摘要
以液压万能材料试验机的下横梁改造为工程实例,在梁型应变式载荷传感器弹性体结构优化的基础上,对采用30CrNiMoTi4V材料制作的弹性梁元件,分别按解析法和有限元法对其应变和强度进行计算,从理论上确定该传感器的最大应变方位及传感器的量程,两种方法的的理论计算结果误差小于6%。在液压万能材料试验机上实际应用表明：该传感器在最大量程为10 kN时可输出4×10^-3ε,应变经放大器放大后可得到5 V电压输出信号,最大应力为226 MPa,能满足测试灵敏度与强度和刚度要求,传感器测试精度在1%之内。梁型载荷传感器还可应用于其他类似设备的改造,实现载荷电量输出。
Taking the rebuilding lower beam of universal material testing machine as an engineering example, on the basis of elastic body structural optimization for strain-type load transducer, spring beam component made of 30CrNiMoTi4V material is adopted. Its strain and strength are calculated by using analytical and finite element method, and the transducer＇s maximum strain orientation and measuring range are determined. Furthermore, the result error of theoretical calculation is less than 6% for both two methods above mentioned. The transducer can produce strain of 4×10^-3ε when it is at maximum range of 10 kN; while the strain is magnified by amplifier, the transducer can achieve voltage output signal of 5 V, maximum stress of 226 MPa. Those can fully meet test quality level, strength and rigidity requirement, also the transducer＇s measuring accuracy is within 1%. Beam-based load transducer can be applied to reform other similar equipment, and it can carry out electric quantity output too.
出处
《实验技术与管理》
CAS
2008年第2期62-65,共4页
Experimental Technology and Management
关键词
载荷传感器
应变
有限元
解析法
load transducer
strain
finite element
analytical method
作者简介
俞然刚（1967-），男，山东省平原市人，博士，副教授，副院长，主要研究方向为材料性能及测试．
