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NVH
Ǵ ļ , Ƿ LS-DYNA ذϰ ϴ ϴ ̴.



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Day

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1st


*Introduction
- Overview of the frequency domain features of LS-DYNA
- Application, Basic theory
- NVH Theory and lab testing technology
- Frequency domain analysis vs. Time domain analysis
- Fourier transform, Windowing technique

*Frequency Response Functions
- Modal superposition method
- Damping
- Pre-stress condition
- Nodal force / Resultant force FRF

*Steady State Dynamics with harmonic loading
- Large mass method for enforced motion

- Modal expanasion

- SSD Fatigue

*Post-processing of analysis results
- Binary plot databases (d3ssd, etc.)
- ASCII databases (frf_amplitude, frf_angle, nodout_ssd, elout_ssd, etc.)






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2nd


*Random vibration with PSD loading
- Correlated multiple excitations
- Restart feature
- Pre-stress condition

*Random Fatigue

- Miners rule
- S-N fatigue curve
- Steinbergs three band technique, Dirlik method

*Post-processing of analysis results
- Binary plot databases (d3psd, d3rms, d3ftg etc.)
- ASCII databases (nodout_psd, elout_psd, etc.)




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