结构试验机因脆性试件加载所致振动的数值仿真分析

结构试验机在脆性试件破坏阶段所产生的振动会导致试验机和附属建筑物损坏以及导致工作人员产生不适感,为了研究振动产生的机理以及影响因素,利用ABAQUS分析了试件脆性特征、试件尺寸、试验机刚度和试验机基础质量对振动的影响规律.研究表明:试件尺寸越大,极限荷载越大,所引起加速度响应则越大.

Numerical Analysis of Vibration Caused by Specimen Fracture of Structural Testing Machine

Environmental vibration caused by specimen's brittle failure leads to damage of the testing machine and auxiliary buildings, and also leads to discomfort of nearby staffs. Reasons and influencing factors of the vibration were studied through ABAQUS finite element simulation in this paper. The influence of specimen's brittle characteristics and size, stiffness of test machine and base weight of test machine were studied. Research shows that larger specimen size and greater applying load cause larger vibration response,increasing the testing machine's stiffness and the base weight reduces the vibration response. The study is valuable for design of structural testing machine.