激励力对发动机机体表面振动影响的仿真分析研究  

Simulation analysis of influence of excitation force on engine block surface vibration

作　　者：喻菲菲[1] 杜灿谊[2] 杨永[1] 曾祥坤[2] 

机构地区：[1]广东技术师范学院机电学院,广州510635 [2]广东技术师范学院汽车学院,广州510635

出　　处：《现代制造工程》2015年第2期73-79,共7页Modern Manufacturing Engineering

基　　金：国家自然科学基金项目(51305085)

摘　　要：发动机工作时内部主要激励力包括燃气爆发压力、活塞连杆等运动件惯性力、配气机构激励力和活塞敲击力等,机体表面振动是发动机内部各种激励力叠加的响应,构成成分复杂。通过AVL EXCITE软件,建立有限元与多体动力学联合仿真模型,计算获得不同激励力作用下的机体表面振动信号数据,再通过时域、频谱分析,研究激励力对机体表面振动的影响,从而解决真实发动机难以进行相关试验测试分析的问题,为发动机振动分析与优化设计提供可靠的依据。The main internal excitation force of the operating engine includes gas explosion pressure, inertia force of the movement mechanisms, valve-train excitation force and piston knocking force and so on. The block surface vibration signal is the superposi- tion response of each excitation force, so the signal composition is complex. On AVL EXCITE platform, a finite element and multi- body dynamics simulation model was established, then the data of block surface vibration signals under different excitation force situations were calculated, the influence of excitation force on block surface vibration were analyzed by time domain and spectrum analysis. This method can overcome the difficulty of doing test with real engine, and the results here could provide a good basis for engine vibration analysis and optimization design.

关 键 词：仿真模型 激励力 机体表面 振动 

分 类 号：TH113.1[机械工程—机械设计及理论]