I am trying to simulate the effects of vibration sweep test on a battery structure, with the acceleration profiles ( converted to loads) as input, using Harmonic Analysis method.
The acceleration load in the sweep test is going to be 3G’s and the sweep range is from 30Hz to 150Hz.
Goals are to check for any resonance, and if any, it’s effect on the structural integrity of the structure.
The CAD setup is such that the Battery Structure is mounted on a Shaker Base (indicated in the Fig. 1 below.
Fig1. CAD Setup
I was able to set up the simulation for X-Axis, and the results seem to be decent, after looking at the Modal Effective Mass plot, Eigenfrequencies, and the direction of the displacement of structure at the corresponding Mode/Frequency.
However, I am getting results other than intended, when I perform it for the Y-axis.
The two main two issues i am facing are :
- Unable to create Coarse mesh for Large Body(s), whose end results are not important. (Fig. 2 and Fig.3 )
Fig. 2 Is there a feature to set the minimum edge length for meshing individual volumes ?
Fig. 3 I would like to coarse mesh this volume as much as large as possible
- For the Y-Axis Simulation, the Shaker Base is absorbing the stresses instead of the battery Structure, while it should be the other way around. I tried increasing the ‘Shaker Base’ Young’s Modulus by 10x, but of not much help. (Fig. 4 and Fig. 5)
Fig.4 : Boundary Conditions Setup for simulation in Y-Axis
Fig. 5: Von Mises Stress from Cyclic loading in Y-Axis.
Am i missing something while setting up the Boundary Conditions, meshes, etc. ?
Would be really great if someone could help me out in this.
My project link would be This.
Fig.6 : Project Tree