基于实验设计法的搁脚机构参数优化设计

Parameter Optimization Design of Footrest Mechanism Based on Experimental Design

针对按摩椅GB/T 26182—2010对机架的力学性能测试要求,运用数值模拟分析软件ANSYS Workbench对设计的按摩椅搁脚机构进行有限元仿真分析。校核其强度和刚度,仿真结果显示,在测试载荷作用下,应力主要集中于搁脚抬升杆且会发生塑性变形;采用实验设计方法研究搁脚抬升杆的参数并进行优化,改善其力学性能,根据参数优化设计结果进行实物样机制作并测试。研究结果表明:通过参数优化设计的方法能够明显改善搁脚机构的力学性能,优化后的结构在测试载荷作用下不会发生塑性变形,实物测试的结果符合仿真结果的预期,证明了参数优化设计的有效性。课题组的研究能够提高机架的强度和刚度,使其满足国标规定的测试要求。

Aiming at the testing requests for the rack of massage chair GB/T26182—2010,the finite element analysis was done to the designed footrest mechanism by using ANSYS Workbench. The strength and stiffness were checked,and the results of simulation showed that the stress was mainly concentrated on the lifting rod and plastic deformation occurred under the test load. By using the method of experimental design,the parameters of the lifting rod of the footrest mechanism were studied and optimized,the mechanical properties were improved. According to the optimized results,the prototype was manufactured and tested. The research results indicate that the mechanical properties of the mechanism can be obviously improved by the method of parameter optimization,and after the optimization,the footrest mechanism will meet the standard requirements,the result of the physical test is in line with the expectation of the simulation result and verifies that the parameter optimization design is effective. The research can improve the strength and stiffness of the rack,so as to meet the testing requirements.