Frequency response analysis including frequency/amplitude dependencies
Challenge: Simulating frequency response analysis including nonlinearity characteristics of frequency/amplitude dependencies
Model of bush, such as hydraulic engine mount, utilizing properties representing its dynamics to simulate linear frequency response is not accurate enough, if it has significant nonlinear characteristics like frequency and amplitude dependencies.
- When the structure has a significant amplitude dependency, its response varies remarkably since the amplitude of a bush changes by its resonance characteristics, even if the excitation force and/or displacement are constant.
- Nonlinear solver such as Adams is available to model the amplitude dependency accurately, however, the modeling procedure is tedious and requires longer calculation time.
How to resolve pains:
Applying ESTECH.RIDE makes it possible to calculate frequency response with simplifying model of amplitude/frequency dependencies based on MSC Nastran model
- Defining amplitude/frequency dependent characteristics for scalar spring elements in FE model.
- Defining velocity dependent characteristics for scalar damping element in FE model makes it possible to develop shock absorber model.
- Coulomb friction model of an equivalent viscous damping approach is available for scalar damper element in FE Model.
Strength of the Software
- The computational time is shorter than that of the time domain nonlinear solver such as Adams.
- Utilizing MSC Nastran FE model makes easy to create simulation model.
Software to be applied
*The name of company and/or individual product name mentioned above are either trademark or registered trademark.
