This invention relates to the field of
electric drive system design and development for
new energy vehicles, specifically to a method for testing and analyzing the
dynamic stiffness of
electric drive assembly mounts and the accuracy of
simulation. The method involves standardized
frequency response testing of the
electric drive assembly mounts, identification of minimum
dynamic stiffness, and the construction of a
dynamic simulation model consistent with the test boundaries to extract the minimum
dynamic stiffness on the
simulation side. Then, it sequentially performs frequency and amplitude
error analysis of the minimum dynamic stiffness points in the tests and simulations, as well as average dynamic stiffness
error analysis. Finally, it comprehensively calculates accuracy performance coefficients based on multi-dimensional error coefficients and establishes a
scoring system to achieve a quantitative evaluation of the test and
simulation accuracy. This method solves the technical problems in existing technologies where evaluating the dynamic stiffness of electric drive
assembly mounts requires multiple physical
impact tests, which are resource-intensive, time-consuming, and lack a systematic and quantitative
analysis method for testing and quantifying the accuracy of
mount dynamic stiffness, thus failing to utilize the
preliminary analysis results to guide subsequent
mount design and development.