Mechanical Stability Analysis of BPM Support at SSRF  

SSRF中BPM支撑的机械稳定性分析(英文)

作　　者：王晓[1] 曹云[1] 陈亮 杜涵文[1] 殷立新[1] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]东华大学信息科学与技术学院自动化系,上海201620

出　　处：《Chinese Physics C》2008年第z1期28-30,共3页中国物理C（英文版）

摘　　要：This paper concentrates on investigating the mechanical stability of a Beam Position Monitor (BMP)support prototype of the Shanghai Synchrotron Radiation Facility(SSRF)project.Both finite element analysis and vibration measurements have been performed.Inconsistent results between the simulations and experiments motivate us to study three connections between the support and the ground:ground bolt(used in the initial design),part grout and full grout(proposed in the later research).After changing the connection, the first eigenfrequency is increased from 20.2Hz to 50.2Hz,and the ratio of the integrated RMS displacement (4—50Hz)is decreased from 4.36 to 1.23 in the lateral direction.The mechanical stability is improved greatly.主要对上海光源(SSRF)束流位置监视器(BPM)支撑的机械稳定性进行了研究.受有限元计算与初始设计方案的振动测试结果不一致的启发,对BPM支撑与地面的连接考虑了三种方案:膨胀螺母、半灌浆与全灌浆连接.通过采用改进的全灌浆连接来代替初始设计的膨胀螺母连接,BPM支撑的横向最低共振频率由20.2Hz增加到50.2Hz,支撑顶部与地面的横向均方根位移(4—50Hz)之比由4.36降低到1.32,机械稳定性能得到大大的提高.

关 键 词：vibration measurement Mechanical stability finite element EIGENFREQUENCY 

分 类 号：O329[理学—一般力学与力学基础]