FAQ's

Purchasing Femtet

Q: How do I purchase Femtet?

A: Please go to Order for Femtet.

Q: Do you accept an order from individual?

A: We only accept orders from those belonging to corporation and organization.

Q: What is a valid period of the license?

A: The license is valid for one year. If you would like to extend the license, please apply for the license at Order for Femtet to renew the license.

Q: If I don’t intend to apply for license extension, do I have to inform you?

A: No.

Q: I received a notification telling me that my license will expire soon. What should I do to extend the validity?

A: You can extend the validity by order for the license.

Q: I want to buy the Japanese version of Femtet. Can I buy it?

A: There is no difference between Japanese and English versions of licenses. After purchasing the license at Order for Femtet, please download the Japanese version installer.

System Requirements

Q: What is the system requirements for Femtet?

A: The system requirements are as follows.

64-Bit Edition

OS Windows 11 x64 Edition / Windows 10 x64 Edition
CPU Intel® EM64T (Pentium, Xeon, Core, CeleronD)- and AMD® (Athlon64, Opteron)-based processors.
Not operational on Intel Itanium and Itanium2.
Memory Minimum: 4GB, Recommended: 16GB
Graphic Resolution: 1024 x 768 or higher, Color: 16 bits (65000 colors) or more
Others Macros are supported in Excel2000 or higher.

32-Bit Edition

OS Windows 10
CPU Intel® IA32 (Pentium, Xeon, Core, Celeron)- and AMD® (Athlon, Opteron, Turion)-based processors.
Not operational on Intel Itanium and Itanium2.
Memory Minimum: 1GB, Recommended: 4GB
Graphic Resolution: 1024 x 768 or higher, Color: 16 bits (65000 colors) or more
Others Macros are supported in Excel2000 or higher.

Q: Can I run Femtet on a PC that is not connected to the internet?

A: Yes you can. Download Femtet installer on a PC that is connected to the internet, copy the installer on to the PC that is not connected to the internet.

Q: Can I run Femtet on a remote desktop?

A: Yes you can.

Q: Is parallel computing possible?

A: Yes. Please note, however, that the cluster analysis which connects multiple computers are not supported.

Q: Can I check who is currently using Femtet?

A: You can see who is using license on which PC here.

License

Q: I want to manage the optional settings PC by PC.

A: Go to Femtet button on the upper left on the Femtet window > General Settings > Optional Licenses tab.

Q: What is the difference between Femtet Free Trial and Femtet Personal?

A: Please refer to this page.

Q: My security system does not allow me to upload a c2v file on your site.

A: Please contact us through Inquiries. Upon receipt of your inquiry, we will send you a mail. Attach c2v file and send it back to us.

User Support

Q: What support can I expect?

A: We support you with operational issues and actions to take in the case of malfunction of Femtet.

Install Femtet

Q: An error occurs when I try to install Femtet.

A: The administrator rights are required for installation. See Installation Manual for details.

Q: An error occurs when I try to install Rastool.

A: Please ensure that you have the latest driver (Sentinel HASP/LDK – Command Line Run –time Installer) before the install.

  • 1. Decompress the file.
  • 2. [hadpdinst.exe] is created.
  • 3. Open DOS window from the Windows start menu.
  • 4. Drag and drop the [haspdinst.exe] on the DOS window.
  • 5. Type argument -i (see the figure below).
  • 6. Press enter and wait for a while.

If a message like [Operation successfully completed.] appears, proceed to installing Rustool.

Q: I can’t download the installer.

A: Please type your ID and password directly from the keyboard instead of “copy and paste”.

Modeling

Q: Can I import CAD data to Femtet?

A: X_T file and DXF file are supported. If the CAD has Parsolid as a kernel, the data can be handled by Femtet. The typical CAD are, Unigraphics®, IronCAD®, SolidEdge, and SolidWorks®. If you use CAD translator (optional), other formats of data can be imported as well.

Q: How to capture a model diagram?

Q: How to share the body form of a model between different projects?
How to copy the body to another project?

Q: How to set a boundary condition to a part of a body?
How to designate a mesh size discretely on a part of a body?

Q: How much drawable range and resolution of a model does Femtet have?

Q: How to create a coil model having a structure other than a spiral?

Q: How to create 2D models from 3D models?

Q: What is the outer boundary condition?

Q: How to smoothly connect two apart faces having different shapes?

Q: Can Femtet edit the imported CAD data?

Q: Why could a mesh error occur when meshing the model of imported CAD data?

Q: How to convert 2D DXF data to 3D data?

Q: When graphical objects, such as faces, in DXF data are imported to Femtet, why are they not imported as a sheet body?

Q: Why can the wire bodies of imported DXF data not be converted to a sheet body?

Mesher

Q: What kind of mesh is available?

A: Mesh is triangle for 2D analysis, and tetrahedron for 3D analysis. Nastran mesh data can be imported.

Q: Can I export the mesh form to other software after analysis?

A: Go to Tool tab > Service > Save Nastran Data. You can save the deformed shape as well.

Q: How do I determine the proper mesh size?

A: In the finite element method, fine meshes are required for the place where the physical changes are drastic. You can use adaptive meshing function, which will automatically give a fine mesh size to the place where calculation error is large. You can also set a fine mesh size manually.

[Adaptive meshing function]

[Mesh size manually]

Q: How to optimize the mesh size?

Q: What is the difference in analysis accuracy between triangular elements and rectangular elements?

Q: What is the difference in analysis accuracy between tetrahedral elements and hexahedral elements?

Q: How can we reduce meshing errors?

Q: What should be done if you fail to create meshes?

Q: How to set a specific mesh size to a model partially?

Q: Can Femtet save mesh data into a file or read from a file?

Q: Can Femtet only create meshes or perform an analysis?

Q: After the Femtet has been updated to a newer version, the results differ from those obtained previously.

Q: What should be done if Femtet fails to create meshes for a model having many curved faces?

Q: What should be done if you fail to create skin meshes?

Q: How to divide a thin body, which has a large aspect ratio, in the thickness direction into meshes?

Q: What should be done if an error occurs related to a self contact?

Q: How to output the resultant deformed shapes into a CAD format file?

Q: How much memory is required for an analysis?

Q: What is the difference between 1st-order elements and 2nd-order elements?

Q: What is the mesh quality?

Analysis Functions

Q: What analysis can Femtet perform?

A: Femtet has eight solvers.

Electric Field Analysis Solves the electric field distribution when the voltage is applied to dielectric and conductive materials.
Magnetic Field Analysis Solves the magnetic field distribution when the current runs in coil or magnet.
Electromagnetic Analysis Solves the propagation constant, S-parameters, resonance of waveguide, and other various electromagnetic waves problems.
Acoustic Analysis Solves the sound propagation driven by sound pressure or velocity.
Piezoelectric Analysis Solves the behavior of piezoelectric materials such as quartz and piezoelectric ceramics.
Thermal Analysis Solves solid model which has temperature boundary condition or heat transfer boundary.
Mechanical Stress Analysis Solves the deformation and stress distribution of elastic material generated by such factors as pressure, load, acceleration, and thermal load.
Fluid Analysis Solves turbulent flows such as air cooling and water cooling can be taken into account.

Q: Is multiphysics possible?

A: Yes. Various kinds of coupled analyses are available.

The possible solver combinations and the physical properties passed on are shown below. There are two types of multiphysics analyses. In the weak-coupling analysis, results of solver 1 is passed on to solver 2. In the strong-coupling analysis, solvers 1 and 2 interact with each other.

Multiphysics Type
(Solver 1 to Solver 2)
Physical Properties Passed On To Solve
Electric Field-Thermal Analysis
(Strong Coupling)
Current density
Temperature distribution
Heat generated by Joule loss.
Magnetic Field-Thermal Analysis
(Strong Coupling)
Current density
Temperature distribution
Heat generated by Joule loss.
Piezoelectric-Acoustic Analysis
(Strong Coupling)
Displacement
Sound pressure
Velocity converted from displacement.
Electromagnetic-Thermal Analysis
(Weak Coupling)
Current density Heat generated by Joule loss.
Thermal-Mechanical Stress Analysis
(Weak Coupling)
Temperature distribution Mechanical stress with temperature distribution taken into account.
Electric field-Mechanical Stress Analysis
(Weak Coupling)
Electrostatic force
Electrostriction
Mechanical stress with electrostatic force taken into account.
Mechanical stress with rlectrostriction taken into account.
Magnetic field-Mechanical Stress Analysis
(Weak Coupling)
Electromagnetic force Mechanical stress with electromagnetic force taken into account.

Q: Can I automate the analysis process?

A: Femtet has a parametric analysis function. The dimensions and materials of the model and boundary conditions can be changed parametrically. Furthermore, the process from model creation to post-processing can be automated with the macro functions. Macros are written in VBA and work on Excel (see examples). For the details of Macro operations, go to [Macro Help] after activating Femtet.

Q: Is material database available?

A: yes Femtet has an extensive database covering various materials. You can register your won data too.

Q: What options do you offer?

A: CAD Translator is available. See the price.

Q: I want to control the number of cores to use.

A: Go to Femtet button on the upper left on Femtet window > General Settings > Setting for Parallel Computing.

Q: What type of differential equations does Femtet solve?

Q: How many elements of a model can be solved by Femtet?

Q: What should be done if the computer is out of memory?

Q: How much is the efficiency of parallel computing?
How to set the number of cores used for various parallel computing?

Q: What should be done if nonlinear calculation does not converge?

Q: What should be done if the calculation does not converge with the iterative method selected as the matrix solver?

Q: What analysis does the results import function of Femtet allow?

Q: What should be done if an error occurs in the batch simulation?

Q: What should be done if the message, “Failed to allocate the memory area”, appears during the analysis?

Q: What are the benchmark results of analysis time, memory consumption, and efficiency of parallel computing?

Q: How can the Femtet operations be automated?

Q: How to register frequently used conditions including body attributes, material properties, and boundary conditions, and use the conditions in another project?

Q: How to copy the analysis model in a project?

Q: How to group bodies?

Electric Analysis

Q: How to set up anisotropic materials?

Q: How to calculate capacitance between a finger and an electrode?

Q: How to calculate resistance?

Q: How to perform the analysis with an electric load of X [Ω] connected?

Q: What boundary condition can be set at the cutting plane of a symmetric model?

Q: How to analyze nonlinear electric conductivity having electric field dependence?

Q: How to analyze the model including both dielectric and conductive materials?

Q: Can Femtet calculate the stray capacitance of a coil?

Q: An input value for electric potential in the harmonic analysis corresponds to which range: peak-to-peak or peak-to-zero?

Q: Does the capacitance calculated by Femtet for a parallel plate capacitor coincide with the theoretical value?

Q: How to calculate the charge accumulating on the electrodes?

Q: How to solve the value of a current through a conductor?

Q: How much air domain is required for the electric analysis?

Q: How does the floating electrode boundary condition work?

Q: What is analyzed for the model having multiple electrodes?

Q: How to display electric force lines?

Q: How to obtain a difference in electric potential between two specified points?

Q: When viewing the result of a thin model for better visibility, how to adjust to enlarge the result display in a specified direction?

Q: How to calculate the average of the magnitude of the electric field in a body?

Q: How to calculate the shape that has been deformed by static force?

Q: What are the governing equations in the electric analysis of Femtet?

Magnetic Analysis

Q: What material properties does Femtet require in the magnetic analysis?

Q: What kind of analysis can Femtet perform in the magnetic analysis?

Q: Can Femtet perform the analysis with the proximity effect taken into account?

Q: How is the magnetic analysis performed when the required data is out of the domain of the B-H curve table?                

Q: In the harmonic analysis of magnetic fields, does the specified current value represent a peak value?

Q: How to calculate the inductor’s floating capacitance?

Q: How to set a multi-turn coil in the magnetic analysis?

Q: How to set inflow and outflow portions of a coil in the magnetic analysis?

Q: What settings are required to analyze a resonant coil in the magnetic analysis?

Q: How does Femtet calculate inductance?

Q: Why does the calculated inductance of an air-core coil not coincide with the actual measurements?

Q: What kind of loss can Femtet calculate?

Q: Can Femtet calculate electromagnetic force?

Q: Can Femtet perform the analysis with magnetic saturation taken into account?

Q: Can Femtet perform the analysis with the skin effect taken into account?

Q: Can Femtet perform induction heating analysis?

Q: Can Femtet analyze a coil with DC superimposed?

Q: How does Femtet represent the current loss of a conductor?

Q: Can Femtet calculate the electromotive force that is generated by electromagnetic induction?

Q: How to calculate leakage inductance in the magnetic analysis?

Q: How to calculate permeance coefficient?

Q: Why does calculation in the magnetic analysis not converge?

Electromagnetic Analysis

Q: What kind of analysis can the electromagnetic solver ‘Hertz’ of Femtet perform?

Q: What material properties are required for the electromagnetic analysis?

Q: Are there any comparisons between calculations by Femtet and actual measurements?

Q: Can Femtet analyze an antenna array?

Q: Can Femtet perform the analysis with surface roughness taken into account in the electromagnetic analysis?

Q: Can Femtet perform the analysis with surface impedance taken into account?

Q: Can Femtet perform the analysis with the shielding effect taken into account?

Q: Can Femtet display a directivity graph?

Q: How to display horizontal and vertical polarizations from the analysis result?

Q: How to solve current and voltage?

Q: Can Femtet display VSWR or group delay?

Q: Does Femtet implement the renormalize and deembeded functions?

Q: How much size of air domain is required to analyze an antenna?

Q: How does the reference frequency work? What value is usually used?

Q: What structures are required for ports in the electromagnetic analysis of Femtet?

Q: How much size is optimal for meshes?

Q: Why does the Lanczos calculation not converge?

Q: Why does the error ‘E3113 Non-propagating mode is selected’ appear?

Q: When the lumped-constant boundary condition is set, errors can occur. How to solve the problem?

Q: How to increase the accuracy and speed of calculation in Electromagnetic Analysis?

Q: How to avoid the parallel plate mode in the 3D electromagnetic harmonic analysis?
How to examine the waveguide analysis results?
How to select propagation mode?
What is the port index of S-parameters?

Q: How to cope with unexpected results in the electromagnetic analysis?

Q: How to cope with errors in electromagnetic analysis?

Thermal Analysis

Q: What is the difference between steady state analysis and transient analysis?

Q: Can Femtet perform the analysis with heat sources changing over time?

Q: If a heat source switches frequently or varies rapidly, how to analyze the model including that heat source?

Q: If multiple solid bodies are set to one body attribute, how much the heat source for each body is?

Q: How much heat source needs to be specified for an axisymmetric or 2D model?

Q: What is the simple method to set heat dissipation boundary conditions, such as natural convection and ambient radiation, to surfaces of a model?

Q: What material properties are required for the thermal analysis?

Q: How to set the temperature dependency for anisotropic thermal conductivity?

Q: Can Femtet perform the analysis with surface-to-surface radiation taken into account?

Q: How to obtain heat balance or heat transfer balance from the analysis result?

Q: How to represent the maximum and minimum temperatures on the specified face graphically in the thermal-transient analysis?

Q: What assumptions are applied to a 2D analysis of the thermal solver?

Q: Why do the results differ when analyzing the same model in the 2D and 3D analyses?

Q: How is thermal conduction modeled for sheet bodies, or multilayer thermal conductive sheets, in the thermal analysis?

Q: Can Femtet analyze substrate warping caused by heat?

Q: Can Femtet perform the analysis with heat generated by joule loss taken into account?

Q: Can Femtet perform the transient analysis using the results of the steady-state analysis as initial temperatures?

Q: Can Femtet perform the thermal analysis with forced convection taken into account to simulate a thermostatic chamber or reflow furnace?

Q: Can the heat transfer coefficient of convection that is automatically or directly calculated for each case below be checked, and what is the calculation method?
・ For natural convection, determining automatically
・ For natural convection, determining by using a directly entered value
・ For forced convection, determining by using specified air flow speed and typical length

Q: Can Femtet perform an analysis by coupling the contact analysis with the thermal analysis?

Q: How to cope with errors below?
E3058 The calculation did not converge with the iterative method. Try the direct method.
E3041 No convergence in the iterative calculation.

Stress Analysis

Q: What is normal stress, shear stress, and principal stress?

Q: What do the positive and negative components of normal stress or strain represent?

Q: Why is maximum principal stress represented by contours, while principal stress is represented by vectors?

Q: What is the relationship between the maximum value of principal stress and the maximum value of maximum principal stress and between the minimum value of principal stress and the minimum value of the minimum principal stress? How about strain?

Q: Why do the maximum value of principal stress in vectors and the maximum value of maximum principal stress in contours not match?
The same question for strain as well.

Q: Why does stress become highly concentrated or localized at a certain portion of a model?

Q: How to calculate the stress that affects peeling on the bonding face between bodies?

Q: How to calculate the average stress on a face or an edge?

Q: How to analyze a warp deformation with thermal expansion and contraction taken into account due to temperature variation?

Q: In Femtet, which is the temperature-dependent coefficient of linear thermal expansion, an instantaneous one or a secant coefficient one?

Q: Can Femtet set an anisotropic coefficient of linear thermal expansion?

Q: How to create a model including parts adhering to each other?

Q: In Femtet, can bodies be connected with a spring?
How to create a model including a spring?

Q: Can Femtet perform an analysis with centrifugal force taken into account?

Q: How to eliminate the self weight that is generated by optionally setting acceleration or the centrifugal force that is generated by optionally setting angular velocity, for specified parts?

Q: How to use the acceleration that is set optionally in the analysis condition and the acceleration of a boundary condition for different purposes?

Q: In 2D stress analysis, what result is affected by [Thickness in Depth Direction]?

Q: What is the difference between plane strain approximation and plane stress approximation in 2D analysis?

Q: What is the difference between resonant analysis and harmonic analysis?

Q: Can Femtet analyze the vibration test?

Q: Can Femtet analyze the impact test?

Q: Can Femtet analyze the drop test?

Q: What is the multilayer plane stress sheet model?

Q: How to use analysis results to calculate the volume, area or length of the deformed model?

Q: What is the symmetric model? What are its advantages and its application range?

Q: Can an asymmetric deformation be analyzed using the symmetric model?

Q: How to set the resultant deformations of an analysis to forced displacement boundary conditions?

Q: What analysis does the results import function allow for?

Q: How to calculate the torque generated at the fixed portion?

Q: When the damping ratio between two resonant frequencies is given, how to transfer it into the Rayleigh damping coefficients ?

Q: What type of nonlinear analyses does Femtet support?

Q: How to obtain the contact force generated at the contact face?

Q: How to cope with the non-convergence of calculation in the contact analysis?

Q: How to take into account the thermal and electric conductivities for the face that has been in contact during the stress analysis?

Q: When two bodies having the same material name are in simple contact, the cross section contour values on the simple contact face are averaged and displayed to be continuous.

Q: Can Femtet perform the analysis associated with nonlinear geometry?

Q: Calculation does not converge due to mesh collapsing in the large strain analysis.

Q: Does Femtet support nonlinear materials in the analysis?

Q: How does Femtet deal material properties in the range where the input data does not cover?

Q: How to determine the material parameters of a hyperelastic material from material test data?

Q: Can Femtet analyze the material like a sponge?

Piezoelectric Analysis

Q: Why does the result of the harmonic analysis in a piezoelectric analysis indicate that the peak of a resultant displacement is divided around the resonant frequency?

Q: How to calculate the volume, area, or length of a deformed model in an analysis result?

Q: How to calculate the amount of electric charge that has been stored on an electrode?

Q: How does Femtet specify the direction of materials?

Q: What is the relationship between the compliance matrix and the stiffness matrix?

Q: What are the four piezoelectricity forms, such as e-form and d-form?

Q: How to input the parameters of anisotropic materials?

Q: How to set temperature coefficients for temperature-dependent materials?

Q: Can the piezoelectric solver of Femtet analyze a model where electric conductivity is set?

Q: Can Femtet perform the analysis with mechanical damping taken into account?

Q: How to perform the piezoelectric-harmonic analysis with viscoelasticity taken into account?

Q: What is the representation of the electric potential boundary condition in harmonic and resonant analyses: peak-to-peak (P-P) or Root Mean Square (RMS)?
Can the phase be set to the electric potential boundary condition?

Q: What is the difference between harmonic analysis and resonant analysis?

Q: How to obtain the displacement in the resonant analysis?

Q: When resonant frequencies are displayed in the mode on the results tab, why is 'no convergence' displayed there?

Q: How to set a symmetric model?

Q: What is the 2D approximation in 2D analysis?

Q: How to perform the analysis with resistance of air or water taken into account?

Q: How to perform the analysis with initial stress taken into account?

Q: How to switch the S-parameter graph to the Smith chart?

Q: How to display the real and imaginary data using two axes?

Q: A piezoelectric speaker and a piezoelectric microphone are placed apart. Sound waves generated by the speaker are received by the microphone. How to analyze the model including both the speaker and microphone?

Acoustic Analysis

Q: Can Femtet set phase differences to multiple sound sources?

Q: After the acoustic analysis, how to change the phase parameter?

Q: What type of boundary conditions can be set to a vibration source?

Q: How to calculate the sound pressure level?

Q: How does the open boundary condition work in the analysis?

Q: What is acoustic impedance? How does the acoustic impedance boundary condition work in analysis?

Q: What are the suitable applications for acoustic impedance boundaries and open boundaries, respectively?

Q: Can Femtet analyze phenomena related to sound reflection, absorption or damping, or transmission?

Q: Can Femtet perform the analysis with absorption or damping taken into account?

Q: Can Femtet analyze tubes resonating with each other in the acoustic analysis?

Q: How to use Huygens’ principle to calculate waves in the outer space of a boundary?

Q: How to display a directivity graph?

Q: How to calculate the sound pressure distribution at a point away from a sound source?

Q: What is the characteristic of analyzing ultrasonic waves?

Q: How does Femtet represent radiation energy?

Q: What are the advantages of using a symmetric model?

Q: What is the optimal mesh size for the acoustic analysis?

Q: Can Femtet analyze the vibration caused by piezoelectricity and the generated sound waves in a coupled analysis?

Q: What is the difference between longitudinal and transverse waves?

Q: What analysis can be performed by the acoustic-transient analysis?

Fluid Analysis

Q: What to do if the fluid analysis does not converge?

A: Refer to the following technical notes in Femtet Help.
Home/Thechnical Notes/Fluid Analysis/Fluid-Thermal Analysis/If Fluid Anlysis/Fluid-Thermal Analysis Does Not Converge
If the problem persists, contact technical support through Inquiries on the Murata Software Website.

Show Results

Q: How to capture the result display screen?

Q: How to check the analysis results at the specified point?

Q: How to save the analysis results on a specified edge, face, or body in csv format?

Q: How to check the integral and average values on the specified edge, face, or body?

Q: How to calculate the scalar dispersion of results on a face?

Q: How to adjust the ranges of multiple contour displays for comparison?

Q: How to change the range of analysis results?

Q: How to adjust vector diagrams for easy viewing?

Q: Why do the maximum values not coincide between in the output window and the results window?

Q: How to check the results of the parametric analysis?

Q: Why is the displacement diagram in an unnatural and distorted shape?

Q: Why is the contour display terminated abnormally or does the results display not look proper?

Q: A contour diagram may show some field values changing discontinuously at the boundary of bodies. If coordinates on the boundary are specified in the [Results as Specified Coordinates] dialog box, to which body do the acquired field values belong?

Q: How to represent Y-parameter and Z-parameter graphically?

Q: How to represent VSWR and the real and imaginary parts of S-parameters graphically?

Q: How to change the view of a graph?

Q: How to save the data of a graph into a CSV file?

Q: How to compare several data curves on the same plot window?

Q: How to represent XYGraph, SmithChart, or PolarGraph graphically?

Q: If multiple edges are selected to represent the data on them graphically, how to determine its start point?

Macro

Q: What should be done if Femtet macros do not work properly?

Q: What should be done if Excel can terminate abnormally on reading a mesh or result file for a large-scale model using a macro?

Q: Mises's equivalent stress can be acquired by two methods using macros as shown below. Converting from tensor by the TransEquivalentValue method Directly acquiring from the potential of GALILEO_VON_MISES_C Should they be used differently?

Q: How to edit a macro file? Are there any tips?

Q: Are there any samples using macros?

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