传感技术学报2017，Vol.30Issue(2)：194-199,6.DOI:10.3969/j.issn.1004-1699.2017.02.005
爆炸冲击条件下的加速度传感器结构分析
Structural Analysis of Micro-Accelerometer Under Blast and Impact Load
摘要
Abstract
For the application of micro-accelerometer in the measurement of blast and impact load,the sensor's static and impact structural response are analyzed by theoretical method and finite element analysis.Under static load,the max stress on the beam would exceed the allowable stress which will lead to the rupture of the accelerometer.In the working direction of accelerometer,the half-sine shock pulses with the same peak(15×104 gn)and different semi-period(5μs,10μs,20 μs,40μs)are added to the mass of the sensor.The cantilever will break under the shock whose semi-period is 5 μs,10 μs and 20 μsbecause of the stress centralization.The max stress on the sensor exceeds the allowable stress under a static load of 15×104 gn,which will lead to the rupture of the accelerometer.Under a shock load whose peak is 15×104 gn and semi period is 30 μs,the stress of the sensor's fixed end is 334 MPa that may cause the fracture of the sensor.The sensor will also break under the shock load with the peak is 15×104 gn and the semi-period is 5 μs,10 μs,20 μsfor the fixed end's stress exceeds the allowable stress.The smaller the period is,the bigger of stress is.The resonance arises when the structure is loaded by the impact with a cycle of 10 μs for the inherent cycle is 9.5 μs,which leads to a increase of the stress.The analysis of structure response of accelerometerunder shock pulse offers theoretical according for the structural design and the construe of reliability of the accelerometer.关键词
冲击振动/结构响应/有限元分析/模态分析/加速度传感器Key words
impact and vibration/structural response/finite element analysis/modal analysis/accelerometer分类
数理科学引用本文复制引用
刘波,杨黎明,李东杰..爆炸冲击条件下的加速度传感器结构分析[J].传感技术学报,2017,30(2):194-199,6.基金项目
中国工程物理研究院电子工程研究所科技创新基金项目(S20161102) （S20161102）
