噪声与振动控制2026，Vol.46Issue(2)：185-191,7.DOI:10.3969/j.issn.1006-1355.2026.02.029
内燃机2阶激励引起的车内噪声预测及优化
Prediction and Optimization of Interior Noise of Vehicles Caused by Second-order Excitation of ICE
李记岗 1陶林杰 1张小虎1
作者信息
- 1. 上汽集团创新研究开发总院,上海 201804
- 折叠
摘要
Abstract
A method for predicting interior noise of vehicles caused by second-order excitation of internal combustion engine(ICE)was proposed.Firstly,combustion gas pressures in the cylinders were measured under a certain rotation speed,and then the pressures were applied to the multi-body rigid-flexible coupling model of the ICE to simulate the inertial loads of moving parts.Secondly,combustion gas pressures and inertial loads were simplified as the resultant loads and resultant torques applied at the crank center.Both loads and torques were transformed into the frequency domain based on Fast Fouri-er Transformation,and their 2nd order loads and torques were extracted as the second-order excitation of the ICE.Thirdly,the excitation forces were shifted from crank center to centroid of powertrain assembly,and applied to the vehicle mode for modal frequency response analysis to predicate the interior noise.Meanwhile,this interior noise was also tested.The compar-ison of simulation and test results show that both results of the sound pressure level curves have a good consistency in the frequency range from 50 to 110 Hz,which proved that this method is correct and effective.Finally,the transfer path,noise transfer function,operating deflection shapes and grid participation analyses were used to identify the weak area of the struc-ture,and then the drainage trough rack of front windshield was optimized,resulting in 5.4 dB decrease of the peak sound pressure level at the frequency of 65 Hz.关键词
声学/内燃机/2阶激励力/车内噪声/优化Key words
acoustics/internal combustion engine/second-order excitation/interior noise/optimization分类
通用工业技术引用本文复制引用
李记岗,陶林杰,张小虎..内燃机2阶激励引起的车内噪声预测及优化[J].噪声与振动控制,2026,46(2):185-191,7.
