压力传感器位移分析及疲劳寿命预测  

Pressure Sensor Displacement Analysis and Fatigue Lifetime Prediction

作　　者：任国晶[1] 蔡春丽[1] 汪大海[2] 

机构地区：[1]中国电子科技集团公司第四十九研究所,哈尔滨150001 [2]哈尔滨汽轮机厂有限责任公司,哈尔滨150046

出　　处：《环境技术》2016年第3期33-36,共4页Environmental Technology

摘　　要：完成了依据有限元疲劳分析为基础的传感器寿命预测研究工作。阐述压力传感器工作原理,定义影响系统寿命的参数组,既包含力学环境参数,亦包括材料属性、几何形式等结构参数。针对不同参数属性,依据疲劳强度计算需求,构建有限元数值计算模型;根据影响传感器寿命的传感单元单晶硅S-N(应力-循环)分布,完成变载荷输入条件下模型疲劳分析,依据数值计算结果完成该压力传感器寿命预测工作。结果表明:压力传感器使用寿命在7.068E8次数以上。本课题研究提出的新方法,摆脱了传统依靠试验完成多种材料组成结构体的疲劳分析及寿命预测窘境,具有通用性。The research on the fatigue prediction of analysis is finished. Work principle of the sensor is materials and geometries for different parts, which the GJB pressure sensor based finite element demonstrated, the influence the According to the different parameter attributes, and based on the cal ife cul param time eters including loading prediction are defined ation requirements of fatigue strength, the numerical calculation model of finite element is established. Then according to the S-N （Stress-Number） distribution of sensor element, Si, which influences the lifetime of the pressure sensor, the model fatigue analysis in the variable load input condition is finished. Finally, according to the numerical calculation results, the life prediction work of pressure sensor is completed. The results show that the service life of the sensor is more than 7.068E8 times. This project proposes a new method, and innovates the traditional method which to complete the fatigue analysis for composition structure of many materials, and gets out of the awkward situation of lifetime prediction. It is of universality.

关 键 词：压力传感器 疲劳分析 寿命预测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]