吳亞萍　秦麗萍　曾樂(lè)彬

摘 要：人們對(duì)汽車(chē)車(chē)內(nèi)噪音舒適性評(píng)價(jià)越顯關(guān)注。車(chē)輛的NVH性能正在成為汽車(chē)開(kāi)發(fā)過(guò)程中的最重要指標(biāo)，白車(chē)身動(dòng)剛度作為NVH性能關(guān)鍵指標(biāo)之一，具有重要意義。本文以某車(chē)型為研究對(duì)象，闡述了白車(chē)身動(dòng)剛度基本分析過(guò)程，并選取后懸減震器接附點(diǎn)動(dòng)剛度為優(yōu)化對(duì)象，通過(guò)CAE仿真技術(shù)，識(shí)別后懸減震器接附點(diǎn)動(dòng)剛度不足的主要原因并進(jìn)行優(yōu)化，實(shí)現(xiàn)了該車(chē)身NVH性能提高。

關(guān)鍵詞：NVH 動(dòng)剛度 模態(tài)分析 ODS診斷

Dynamic Stiffness Analysis and Optimization of BIW Based on CAE Simulation Technology

Wu Yaping Qin Liping Zeng Lebin

Abstract：People pay more attention to the evaluation of the interior noise comfort. Vehicle NVH performance is becoming the most important index in the process of vehicle development. As one of the key indexes of NVH performance analysis， the dynamic stiffness of body in white is of great significance. Taking a vehicle as the research object， this paper describes the basic analysis process of the dynamic stiffness of the body in white， and selects the dynamic stiffness of the connection point of the rear suspension shock absorber as the optimization object. Through the CAE simulation technology， the main reasons for the insufficient dynamic stiffness of the connection point of the rear suspension shock absorber are identified and optimized， and the NVH performance of the body is improved.

Key words：NVH， dynamic stiffness， the modal analysis， ODS diagnosis