某厢式车行驶时车内闷音成因分析与验证

Analysis and Verification of the Cause of Muffled Sound in the Car While a Van is Driving

本文针对某厢式车行驶至某一车速时,车内出现的闷音问题进行成因分析及验证。通过分析该厢式车动力传动系统振动加速度以及车内闷音强度的测试数据,确定闷音产生的具体原因,并通过相关试验对分析结果的准确性和可靠性进行验证。经分析,该厢式车内闷音的成因是动力传动系统与整车发生共振,前主减速器某悬置隔振效果较差,导致车架端存在较高的振动加速度,再经由各零部件传递至车内,诱发车内严重的闷音。并通过施加相应的约束进行相应的试验,对上述结论进行验证。

This paper analyzes and verifies the causes of the muffled sound problem in a van when it travels to a certain speed.By analyzing the test data of the vibration acceleration of the power transmission system of the van and the intensity of the muffled sound in the car,the specific cause of the muffled sound was determined,and the accuracy and reliability of the analysis results were verified by relevant tests.After analysis,the cause of the muffled sound in the van is that the power transmission system resonates with the whole vehicle,and the vibration isolation effect of a suspension of the front final reducer is poor,resulting in a high vibration acceleration at the frame end,and then transmitted to the car through various parts,inducing serious muffled sound in the car.The above conclusions are verified by applying corresponding constraints and corresponding experiments.