平面S型微弹簧多轴向弹性系数分析  

Multi-axial Elastic Coefficient Analysis of Planar S-shaped Micro-spring

作　　者：程建建[1] 聂伟荣[1] 周织建[1] 黄庆武[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《仪表技术与传感器》2014年第4期4-6,共3页Instrument Technique and Sensor

摘　　要：针对在集中力作用下S型弹簧弹性系数理论公式不完善以及惯性力环境下弹簧弹性系数理论公式缺乏,推导了弹簧横向、纵向以及垂直方向弹性系数理论公式。利用仿真软件验证理论计算公式的正确性,分析得到在集中力作用下弹簧的弹性系数理论值与仿真值相对误差小于0.3%,惯性力作用下的弹簧弹性系数理论值与仿真值相对误差小于2%。分析表明,弹簧横向弹性系数随着环境力的增大而减小;在纵向惯性力作用下,与锚点相连弹簧U单元弹性系数最小以及最大正应力最大;在垂直方向惯性力作用下,弹簧垂直方向弹性系数随质量块体积增大而减小。Elastic coefficient formula of S-shaped spring under the concentrated force is deficient, and spring is lack of elastic coefficient formula under the inertial force. Therefore multi-axial elastic coefficient theoretical formulas of planar S-shaped micro- spring were deduced. This paper used simulation software verifies the theoretical correctness of the formulas. The analysis results show the relative error of theoretical value and simulation value is less than 0. 3% under the concentrated force, and the relative er- ror is less than 2% under the inertial force. The transverse elastic coefficient is along with the environment force increasing. The longitudinal elastic coefficient of the U unit which is connected with the anchor is minimal, and maximum normal stress is the lar- gest under the inertial force. The vertical elastic coefficient decreases with mass volume increasing under the action of inertial force. The study provides theoretical reference for optimal design of micro inertial device.

关 键 词：微惯性器件 平面微弹簧 多轴向弹性系数 惯性力 集中力 

分 类 号：TH703[机械工程—仪器科学与技术]