制冷机组发动机隔振仿真分析及机架结构优化  

Simulation Research on Decoupling Theory for Vibration Isolation System of Refrigeration System Engine and Dynamic Optimized Design of Frame Structure

作　　者：孙智慧[1] 高德[1] 郑大宇[1] 王峰林[2] 

机构地区：[1]哈尔滨商业大学轻工学院 [2]哈尔滨工业大学振动与噪声控制研究所

出　　处：《农业机械学报》2007年第6期151-155,160,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：黑龙江省科技攻关项目(项目编号:G00A10090)

摘　　要：利用已建立的制冷机组发动机隔振系统动力学模型及其解耦分析,运用ADAMS10.0建立了发动机隔振系统现有支承和半解耦支承形式的仿真模型,并进行线性模态分析。分析表明:发动机现有支承存在严重的振动耦合;采用半解耦支承形式,其质心的动态响应显著减小,即X和Y方向的位移减至0.79811mm和1.6095mm,解决了发动机的振动耦合问题。运用I-DEAS8.0软件,对原机组的机架进行了振动模态分析和动态响应仿真分析,现有机架固有频率54.6Hz时发生整体变形,最大变形为1.08mm,原机架的整体动刚度差;通过对原机架的结构改进,使机架发生整体变形的固有频率提高到129.5Hz,机架最大变形减小为0.359mm,显著改善了机架的结构动态性能,提高了制冷机组的动态工作性能。On the basis of ever built vibration isolation dynamic model, dynamic equations, and decoupling analysis, the vibration problem of LFQ refrigeration system engine has been focused on. In addition, simulation models of current support mode and the half decoupling support mode for the engine vibration isolation system were established with ADAMS10.0, and linear modal analysis has been given. The result indicated that current engine support mode has severe vibration coupling, dynamic responses of mass center of the engine could decrease dramatically by the half decoupling support mode. Direction X and Y decreased to 0. 798 11 mm and 1. 609 5 mm, the problem of engine vibration coupling has been resolved by way of vibration modal analysis and simulation analysis of the dynamic response by I-DEAS8.0. The maximum deformation was 1.08 mm at the natural frequency 54. 6 Hz （four mode shapes） of frame structure; the total structure rigidity is not ideal. The maximum deformation was 0. 359 mm at the natural frequency 129.5 Hz by structural improvement, dynamic performance increased greatly.

关 键 词：制冷机组 隔振解耦 动力学 优化 仿真 

分 类 号：TH113.1[机械工程—机械设计及理论] TB657[一般工业技术—制冷工程]