In this tutorial, we perform a random vibration analysis on a truss tower to determine the effect of excitation applied to the base. Random vibration analyses determine how the structure of an object reacts to constant, random vibration such as what occurs in a moving vehicle due to road conditions or wind turbulence. The input excitation is in the form of a power spectral density (PSD), which is a representation of vibration frequencies and energy in a statistical form. Random vibration solutions are known as restart analyses, specifically, modal superposition. That is, they require the natural frequency and mode shape results from a previously run modal analysis of the same model.
Features Illustrated:
- Random vibration analysis
- Random vibration results