Mechanical Stability Analysis of BPM Support at SSRF

WANG Xiao; CAO Yun; CHEN Liang; DU Han-Wen; YIN Li-Xin

Chinese Physics C> 2008, Vol. 32> Issue(S1) : 28-30

Mechanical Stability Analysis of BPM Support at SSRF

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Abstract：
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.

References

[1]

. ZHAO Zhen-Tang. SSRF Beam Stability Challenge and Comprehensive Measures, Eastern Forum of Science andTechnology, DEC. 7. 2006. Shanghai2. DAI Z M, LIU G M. Study of Orbit Stability in the SSRF Storage Ring, Proceedings of APAC'01, 2001. 293-2953. Doose C, Sharma S. Investigation of Passive Vibration Damping Methods for the Advanced Photon Source Stor-age Ring Girders, MEDSI2002, APS, Chicago 2002. 133-1394. YANG Xue-Shan. Measurement Instrument and Thechiquein Engineer Vibration, China Measurement Publications,2001. 196-2005. WANG Feng. The Latest Tutorial of Classic ANSYS and Workbench, Electronics Industry Publications, 2004(1):328-3386. LI De-Bao. Analysis of Experimens in Engineering Vibra-tion, Tsinghua University Publications, 2004. 291-2957. Sharma S. Design of Accelerator Girder System for Vibra-tion Suppression, Workshop on Ambient Ground Motion and Civil Engineering for Low Emittance Electron StorageRing, Hsinchu, China, 2005

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WANG Xiao, CAO Yun, CHEN Liang, DU Han-Wen and YIN Li-Xin. Mechanical Stability Analysis of BPM Support at SSRF[J]. Chinese Physics C, 2008, 32(S1): 28-30.

WANG Xiao, CAO Yun, CHEN Liang, DU Han-Wen and YIN Li-Xin. Mechanical Stability Analysis of BPM Support at SSRF[J]. Chinese Physics C, 2008, 32(S1): 28-30. shu

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Received: 2008-01-09
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Mechanical Stability Analysis of BPM Support at SSRF

Corresponding author: WANG Xiao,

Received Date: 2008-01-09
Accepted Date: 1900-01-01
Available Online: 2008-01-04

Abstract: 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.