Vehicle body characteristic analysis method and vehicle body characteristic analysis auxiliary device

摘要

PROBLEM TO BE SOLVED: To analyze characteristics of vibration and noise of a car body by using a MATV method for utilizing the analytic result for designing a car body and the like.SOLUTION: A modal acoustic transmit vector (MATV), a mode pungency factor (MPF), and acoustic sensitivity (p) which is a product of the MATV and the MPF on an observation point of the car body are determined on the basis of car body acoustic data and structure data, and an element of the acoustic sensitivity (p) is analyzed. Relative values of the modal acoustic transmit vector (MATV) in resonance frequency of the acoustic sensitivity (p) and the mode pungency factor (MPF) in resonance frequency of the acoustic sensitivity are extracted. Comparing the respective relative values, the larger relative value is determined that it has higher resonance contribution.