TLJ-60A型土工离心机转臂系统力学分析与实测分析

目的评估TLJ-60A型土工离心机转臂系统能否满足强度要求,并提出改进建议。方法对转臂系统建立三维有限元数值模型,确定载荷条件和边界条件,计算关键部位的最大等效应力,给出材料使用建议。在建成后离心机运行中进行应变响应实测,并就计算结果与实测数据进行比较分析。结果数值模拟结果与实测结果吻合较好,平均差异为4.5%,最大差异为12.46%,数值模拟偏保守。结论评估结果及改进建议是正确的,支撑了设备研制的一次成功。

Mechanical Analysis and Testing of Rotary Arm System of TLJ-60A Geotechnical Centrifuge

Objective To evaluate whether the rotary arm system of TLJ-60A geotechnical centrifuge can meet the strength requirement and give some suggestions. Methods The 3-dimensional finite element numerical model was built and the boundary and load conditions were determined. Then the maximum equivalent stresses in key locations of the rotary arm system were calculated and a suggestion on the material selection was given. After the centrifuge assembling, the strains of the corresponding locations were tested in a working condition. Results It showed that the numerical results agreed well with the test results. The mean difference was 4.5%, the maximum difference was 12.46%; and the numerical results were conservative. Conclusion The evaluation and the suggestions were correct, which supported the one-time success of the equipment.