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NVH, Frequency Domain, Fatigue

The objective of the training course is to introduce the frequency domain vibration, fatigue and acoustic features of LS-DYNA to users, and give a detailed look at the application of these features in vehicle NVH simulation.

 

This course is recommended for engineers who want to run NVH or other frequency domain vibra­tion, fatigue and acoustic simulation problems with LS-DYNA. This course is useful for engineers and researchers who are working in the area of vehicle NVH, aircraft/spacecraft vibro-acoustics, engine noise simulation, machine vibration testing and simulation, etc.

 

Contents

  • Introduction
    NVH theory and lab testing technology, overview of LS-DYNA frequency domain features and applications, frequency domain vs. time domain, Fourier transforms
  • Frequency Response Function (FRF)
    Modal superposition method, damping, nodal force/resultant force FRF
  • Steady State Dynamics (SSD) with harmonic loading
    Large mass method for enforced motion, Equi­valent Radiated Power (ERP), mode expansion with LS-PrePost
  • Random vibration with PSD loading
    Correlated and uncorrelated multiple PSD excitations, acoustic wave, pre-stress condition
  • Acoustics
    Rayleigh method, Kirchhoff method, BEM, FEM, acoustic panel contribution analysis, vibro-acoustic problems, Muffler transmission loss analysis, ATV and MATV techniques, acoustic eigenvalue analysis, incident waves, half-space problem, weighted SPL, radiated sound power
  • Response spectrum analysis
    Input earthquake spectrum, modal combination methods (SRSS, CQC, etc.), multi input spectra
  • Fatigue
    Fatigue analysis in harmonic/random vibration environment, Miner’s rule, S-N curves, Dirlik method
  • Advanced topics
    SEA (Statistical Energy Analysis), brake squeal analysis; NVH based on IGA
  • Workshop
Dates
Dates Duration/days Registration Referee Language Location Fee
06.10.2020
1 day Registration
Yun Huang
Ulm
600 €

Lecturers

Yun Huang
Yun Huang

Dr.
Lecturer of the seminar:
- NVH, frequency domain analysis and fatigue with LS-DYNA