梳理机工作辊结构的优化设计

为提高国内梳理机工作辊在缠绕针布和重力作用工况下的直线度,采用ANSYS软件对现有国产某型号工作辊的机械结构进行研究和分析,并在此基础上对梳理机工作辊进行优化设计。首先建立工作辊拓扑优化和尺寸优化数学模型,推导拓扑优化数学模型中目标函数对设计变量的敏度。然后根据分析研究结果,针对工作辊机械结构提出二步优化方案,基于ANSYS软件采用自编优化程序对工作辊进行拓扑优化和尺寸优化。研究结果表明:优化后的工作辊材料分布达到最优;在满足应力约束的条件下,工作辊最大挠度由原结构的0.33 mm减少到优化后的0.11 mm,减少了67%,优化后工作辊直线度和性能得到提升。

Structure optimization for work roll of carding machine

In order to improve the straightness of domestic carding machine work roll subjected to the card clothing weight and with self-weight, the structure analysis and study were carried out for a certain type domestic work roll with ANSYS. On the basis of the analysis and study, the optimum design of carding machine work roll was carried out. Firstly, the mathematical model of topological optimization and size optimization was established, and the sensitivity of the objective function to design variables was deduced in the topology optimization mathematical model. Then, the two-step optimization scheme was proposed based on analysis and study of the work roll, and the structure of work roll was optimized by topology optimization and size optimization successively based on ANSYS APDL and the own optimizer. The results show that the materials are distributed to it's right place, and the maximum of deflection reduce from 0.33 mm to 0.11 mm with the constrained stress, the maximum of deflection obtained by optimization reduces by 67% compared with the non-optimized one, the straightness of the work roll is improved, and the performance of the work roll is also improved.