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中文摘要: 针对加速度传感器在爆炸与冲击过载测试中的应用，从理论与有限元仿真出发，分析加速度传感器结构的静态响应与冲击响应。在静态载荷下，加速度传感器结构在g的冲击加速度下应力超过材料的许用应力，将会发生结构断裂。在加速度传感器的工作方向上施加幅值为g，半周期为5、10、20、40的半正弦加速度冲击载荷，悬臂梁在半周期为5、10、20的冲击下，将会出现断裂。大体上，冲击载荷的周期越小，悬臂梁固定端的应力集中现象越严重。由于传感器固有周期为9.5，加速度传感器在半周期为10的冲击载荷下出现谐振，固定端处应力集中现象加剧。分析加速度传感器在冲击载荷下的结构响应为传感器的结构设计与具体应用时的可靠性分析提供了理论依据。
Abstract:For the application of micro-accelerometerin the measurement of blast and impact load，the static and impact response of sensor’s structure 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(g) and different semi-period(5,10,20,40)) are added to the mass of the sensor.The cantilever will break under the shock whose semi-period is 5,10 and 20because of the stress centralization .The smaller the period is,the severer the phenomenon of stress- centralization is.The resonance arises when the structure is loaded by the impact with a cycle of 10 for the inherent cycle is 9.5,which leads to a severer stress- centralization.The analysis of structure response of accelerometerunder shock pulse offers theoretical according for the structural design and the construe of reliability of the accelerometer.
文章编号：cg16000735 中图分类号： 文献标志码：
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
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