差容式地震计机械摆结构分析与优化设计  

Structural Analysis and Optimal Design of Mechanical Pendulum of Differential Capacitance Seismometer

作　　者：张涛 王顺晔 洪利 高强 韩智明 邱忠超 Zhang Tao;Wang Shunye;Hong Li;Gao Qiang;Han Zhiming;Qiu Zhongchao(Institute of Disaster Prevention,School of Electronic Science and Control Engineering,Sanhe 065201,Hebei,China;Key Laboratory of seismic dynamics of Hebei Province,Sanhe 065201,Hebei,China;Langfang Normal University,Electronic and Information Engineering Department,Langfang 065000,Hebei,China)

机构地区：[1]防灾科技学院,电子科学与控制工程学院,河北三河065201 [2]河北省地震动力学重点实验室,河北三河065201 [3]廊坊师范学院,电子信息工程学院,河北廊坊065000

出　　处：《震灾防御技术》2021年第2期391-397,共7页Technology for Earthquake Disaster Prevention

基　　金：国家重点研发计划项目(2018YFC1503801);中央高校基本科研业务费项目(ZY2018011025,ZY20180112);廊坊市科学研究与发展规划自筹经费项目(2018011025);防灾科技学院“金课”建设项目(JK202025)。

摘　　要：地震计可对地震信息进行实时采集与记录,在地震预测和地震灾后监测中发挥了重要作用。本文针对差容式地震计机械摆固有频率高的问题,采用有限元分析软件ANSYS建立机械摆有限元模型,对关键结构十字簧片进行静态和模态分析,并对簧片形状进行拓扑优化设计。采用正弦标定法对优化前后机械摆固有频率进行测量。试验结果表明:优化后实际机械摆固有频率降低了17%,由5.3 Hz降为4.4 Hz,证明了优化设计的可行性。Seismometer can collect and record seismic information in real time,which plays an important role in earthquake prediction and post disaster monitoring.Aiming at the problem of high natural frequency of mechanical pendulum of differential capacitance seismometer,the finite element model of mechanical pendulum is established by using ANSYS simulation software.The static and modal analysis of key structure cross spring is carried out,and the shape of spring is topologically optimized.The sine calibration method is used to measure the natural frequency of the mechanical pendulum before and after optimization.The experimental results show that the natural frequency of the actual mechanical pendulum after optimization is reduced by 17%,from 5.3 Hz to 4.4 Hz,which proves the feasibility of the optimization design.

关 键 词：差容式地震计 机械摆 固有频率 拓扑优化 

分 类 号：P315.62[天文地球—地震学]