南京航空航天大学学报2025，Vol.57Issue(1)：186-194,9.DOI:10.16356/j.1005-2615.2025.01.019
基于有限元分析的模数式伸缩缝振动噪声研究
Investigation on Vibration Noise of Modular Bridge Expansion Joints Based on FEA
摘要
Abstract
Modular bridge expansion joints(MBEJs)is a common form of bridge expansion.So far,it is widely used by different kinds of bridges.However,the noise of joints under vehicle load is still a problem,which seriously influence the life quality of surrounding residents.The paper takes MBEJs as the research object to study the vibration characteristics and noise characteristics of the expansion joints.Several finite element analyses(FEA)are conducted to study the influencing factors of the first-order vertical mode and the variation laws of multiple modes of MBEJs.Besides,analyses for the acoustic frequency responses of joint-cavity system and the acoustic modal responses of the cavity are conducted by using the numerical simulation method.The above results are compared to study the generation and transmission mechanisms for noise of joints under vehicle load.The results show that noise of MBEJs is caused by coupling action of vehicle-induced vibration excitation and cavity acoustic mode excitation.The noise can be reduced by packing and sealing the lower cavity of expansion joint.关键词
模数式伸缩缝/振动噪声/有限元分析/声学频响/声模态Key words
modular bridge expansion joints(MBEJs)/vibration noise/finite element analysis(FEA)/acoustic frequency responses/acoustic modals分类
交通运输引用本文复制引用
李瑞琪,宋晓东,陈素华,丁如珍,费梁,戴世宏..基于有限元分析的模数式伸缩缝振动噪声研究[J].南京航空航天大学学报,2025,57(1):186-194,9.基金项目
国家自然科学基金(52378287). （52378287）
