90°V8柴油机整机结构动态响应分析  

Dynamic Response Analysis of 90°V8 Diesel Engine

作　　者：郭常立[1] 张保成[1] 马艳艳 赵丕欢[1] 

机构地区：[1]中北大学机械工程与自动化学院,太原030051 [2]江阳化工厂

出　　处：《噪声与振动控制》2009年第2期35-37,118,共4页Noise and Vibration Control

基　　金：预研项目资助;项目编号:40402040108

摘　　要：建立了90°V8柴油机整机结构的有限元分析模型,采用Lanczos法对整机组合体的自由模态进行了计算,得到了其固有频率和振型。在此基础上,考虑柴油机在额定工况下,以气缸燃气压力、活塞侧压力和主轴承作用力为主要因素,确定了柴油机所受的激励力,利用模态叠加法对柴油机进行了动态响应分析计算,得出了各阶模态的模态响应函数,为运用ATV技术求解内燃机表面辐射噪声提供了边界条件。A 90° V8 diesel＇ s finite element model is established. Adopting the Lanczos method, its free vibration mode is computed. The natural frequencies and mode configurations are obtained. The exciting force on the diesel under the normal condition is determined and the major factors, such as the cylinder combustion pressure, piston side pressure and main bearing forces, are considered. Mode superposition method is adopted for computation and analysis of dynamic response of the 90 V8 diesel. Modal response functions of all modes are obtained, which provide boundary conditions for the computation of radiation noise from engine surface with ATV technique.

关 键 词：振动与波 柴油机 有限元法 模态叠加法 动态响应分析 

分 类 号：TK42[动力工程及工程热物理—动力机械及工程]