离心机臂动特性分析  

Analysis of Dynamic Characteristics of the Centrifuge Arm

作　　者：沈润杰[1] 何闻[1] 梅德庆[1] 陈子辰[1] 

机构地区：[1]浙江大学生产工程研究所,浙江杭州310027

出　　处：《工程设计学报》2001年第2期77-80,共4页Chinese Journal of Engineering Design

基　　金：教育部博士点基金资助项目 !(19990 335 34)

摘　　要：在高线加速度下热与振动复合环境试验中 ,通常用离心机来实现高线加速度环境 .由于离心机臂端安装振动台、温度箱、夹具、试件 ,其总重量很大 ,在高转速下将产生很大的离心力 ,造成离心机臂伸长 ,从而影响加速度输出精度 .因此 ,利用有限元方法 ,对离心机在不同转速下机臂位移场进行计算 ,分析了离心机臂伸长对加速度输出精度的影响 ,并对离心机固有振动特性进行了分析 ,得出了一些有意义的结论 .Centrifuges are often used to realize high\|linear\|acceleration in the test of thermo\|\{vibration\} combined environment under high\|linear\|acceleration. At the end of it is located that vibrating table, temperature box, clamping fixture and test piece, which are often very heavy. The arm of centrifuge will be elongated as the result of large centrifugal force which is generated because of the high rotating speed, so the precision of output acceleration will be affected. Finite element method is used to analyze the deformation field of the arm of centrifuge in different rotating speed, and the relationship between the elongation of the centrifuge arm and the precision of output acceleration is analyzed, then the inherent characteristic of the arm vibration is analyzed, finally the valuable conclusions are gained.

关 键 词：高线加速度 离心机 试验环境 应力场 飞行器 热振动 复合模拟环境试验 机臂 振动特性 

分 类 号：V216.5[航空宇航科学与技术—航空宇航推进理论与工程] TH113.1[机械工程—机械设计及理论]