基于DOE/RecurDyn铁路货车基础制动装置缓解性能优化

Release Performance Optimization for Foundation Brake Rigging in Railway Wagon based on DOE/RecurDyn

分析得出影响铁路货车基础制动装置缓解性能的关键因素是机构铰链的间隙配置.采用正交试验设计(Design of experiment,DOE)与RecurDyn多体动力学仿真实验相结合的方法,以缓解力最小作为试验指标,将基础制动装置连接副配置间隙转化为构件的设计参数作为影响因子,运用Minitab设计了L8(2 7)正交试验方案,通过RecurDyn软件对8组试验方案进行多体动力学仿真实验,并借助现场实验数据验证了仿真结果的有效性.根据试验结果分析了各个可控因素的信噪比及贡献度,得出铰链、杆件最佳间隙配置方案,最小缓解力下降了11.3%.上述研究成果为优化铁路货车基础制动装置等复杂空间机构的性能提供了重要技术支持.

It is found that the key factors which mainly affect the release performance of the foundation brake unit belong to the gaps configuration of the mechanical hinges.Then,the experiments are conducted by the combination of experiment design and multi body dynamic simulation.Design parameters,converted by gap configuration of connect sets of the foundation brake unit,are set as the influence factors.In this case,a L8(27)orthogonal test scheme is designed in Minitab software to optimize the release performance of the foundation brake unit and target on the test index.Eight experiment programs in the L8(27)orthogonal test scheme are calculated and simulated with the help of multi body dynamic simulation software,RecurDyn.The reliability of the simulation results was verified by field experiments.The optimized gaps configuration scheme of the mechanical hinges and rods are put forward by analyzing signal-to-noise ratio and contribution degree of each controllable factor according to the simulation results.The simulation results of the optimized scheme show that the minimum release force is reduced by 11.3%.The research outcomes above provide important technical support for optimizing the performance of complex spatial mechanism,such as the foundation brake unit in railway wagons.