実験SEA による回転鉄輪への入力同定法の検討

抄録

As a mechanism for generating tire noise, it is input to the tire due to interference with the road surface. The input vibration propagates through the tire, causing the tire to vibrate. The estimation method of structural radiation sound emitted by the vibration of the tire and other sound than its are collectively called tire road surface noise. In this study, we discuss the investigation using a rotating iron wheel to grasp the vibration phenomenon due to the interference between the tire and the road surface and to estimate the structural radiation sound generated from the tire. Unlike a tire, this rotating iron wheel is a structure with high rigidity and little quantity of the natural frequency．Therefore, this paper discusses the input power to the rotating body is identified using the experimental SEA, and the processing of the experimental SEA model obtained with limited measurement data is examined. First, the rotating iron wheel will be explained. Next, the conventional experimental SEA method is used to evaluate the input power from the road surface to the iron wheel when the iron wheel is rolled. Then, the evaluation result of the identified input power is examined and considered. Then, we show the possibility that the evaluation accuracy of the input power can be improved by numerically processing the frequency characteristics of the experimental SEA model constructed with limited measurement data.