CAE Software【Femtet】Murata Software Co., Ltd.
General
Forced oscillation is applied on two standing bars.
The resulting vibrations are analyzed.
Unless specified in the list below, the default conditions will be applied.
Item |
Settings |
Analysis Space |
3D |
Model unit |
mm |
The analysis type is the harmonic analysis.
Item |
Settings |
Solvers |
Mechanical Stress Analysis [Galileo] |
Analysis Type |
Harmonic analysis |
Options |
N/A |
The resonant frequencies of each tower are 1250[Hz] and 1650[Hz], which are acquired by individual analyses.
Therefore, the sweep range is around those frequencies.
The harmonic analysis is set as follows.
Tab |
Setting Item |
Settings |
Harmonic analysis |
Frequency |
Minimum: 1000[Hz] Maximum: 2000[Hz] |
Step |
Linear step: Division number: 20 |
Two bars (TOWER) are standing on a plate (GROUND).
The boundary condition is set on the face topology of GROUND to force the displacement in the Y direction. It is named VIBE_Y
Body Number/Type |
Body Attribute Name |
Material Name |
0/Solid |
TOWER |
001_Al * |
1/Solid |
TOWER |
001_Al * |
2/Solid |
GROUND |
001_Al * |
* Available from the Material DB
The forced displacement is applied on on the face of GROUND in the Y direction. The displacement in X and Z directions are fixed.
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
VIBE_Y/Face |
Mechanical |
Displacement |
Select all X/Y/Z components. UX=UX=0.0, UY=1×10^-3[m] |
This means the magnitude of Y displacement is 1[mm].
The displacement diagrams are shown below. The oscillation frequencies are 1000[Hz], 1250[Hz], 1450[Hz], 1600[Hz] and 2000[Hz] respectively.
The contour diagram shows the displacement.
The displacement is high at the resonant frequencies: 1250[Hz] and 1600[Hz]. (Watch out for the color scales)
The vibrations are out of phase for the non-resonant frequencies.