how we can setup the deck for vibration fatigue analysis in hypermesh Optistruct 2025v. ?
Hello,
You can follow the tutorial bellow:
https://2024.help.altair.com/2024/hwsolvers/os/topics/solvers/os/random_response_fatigue_tutorial_r.htm
From where we can get the data for AutoPSD A , AutoPSD B, and CrossPSD AB, and what this data signify?
You can obtain PSD curves from industry standards, laboratory or field test data, academic publications and online resources, depending on your specific application and industry.
You may find the bellow post helpful:
Hello Ankith,
In the context of vibration fatigue analysis, FEMFAT (Finite Element Methods Fatigue) software offers advanced capabilities to predict fatigue life under random Power Spectral Density (PSD) loading conditions. The software allows users to input both auto and cross PSDs, supporting standard industry profiles such as SAE, among others. Alternatively, custom PSDs can be derived from test data—such as Road Load Data Acquisition (RLDA)—to reflect the specific characteristics of an existing system.
Thank you!
