FEMFAT spectral extension module: Vibration fatigue strength evaluation

It can significantly reduce the computation time for fatigue life analysis, which requires extensive time series data analysis.

In highly random excitation mechanisms (such as vibrations caused by bench tests or road surface inputs), analyzing vast amounts of time series data requires significant computational costs. FEMFAT spectral provides the optimal solution to this challenge. By directly performing damage calculations from multi-axis time series inputs in the frequency domain (random response fatigue), it can significantly reduce the computation time for fatigue life analysis. To achieve this, FEMFAT spectral transforms data into the frequency domain known as PSD (Power Spectral Density). This allows for damage calculations under multi-axis loading conditions to be executed directly in the frequency domain. In many application cases, the excitation loads are not completely independent. Therefore, FEMFAT spectral offers the option to consider the correlation between individual excitation loads by defining the cross power spectral density (cross PSD). Utilizing cross PSD provides an additional advantage by allowing the equivalent stress PSD to be statistically formed correctly. *For more details, please download the PDF or contact us.*

Magna Powertrain ECS Website

basic information

FEMFAT Spectral 【Features】 ■ Multi-axis damage calculation using random vibration input ■ Reduced computation time due to a highly efficient and robust analysis process ■ Equipped with Dirlik and Rayleigh probability models (probability density functions) ■ Damage calculations under different loading conditions can be performed without repeating FE analysis (by changing the load PSD) ■ Capable of considering multiple influencing factors and simultaneously analyzing base material and welded joints *For more details, please download the PDF or contact us.*