1.5MW风力发电机轮毂优化计算

轮毂在风力发电机中承受复杂的交变载荷,承担着传递转矩,抵抗风载的作用,因此轮毂设计尤为重要。目前,国内许多兆瓦级轮毂设计得偏重,增加制造成本的同时,由于转动惯量过大,也增加了系统控制的难度。本文通过对轮毂腹板布置方式的优化,重量减轻了12.6%,并采用有限元分析软件,按照德国劳埃德(GL)规范,对优化后的轮毂的极限强度进行有限元计算。通过计算掌握了风力发电机组轮毂的强度分布和厚度分布规律。文中模拟轴承压力角45°的方法,通过了国外认证机构的认可,为进一步开展新型机组轮毂的设计提供了理论支持。

基于有限元风机轮毂结构形状优化与模态分析

利用有限元分析方法,针对风机轮毂结构,建立形状优化分析计算的数学模型,在满足给定条件下,将使轮毂结构的质量降低到最小和结构应力分布得到改善。在此基础上,对轮毂优化前、后的结构进行了模态分析比较,得到的结果显示,结构形状优化设计不仅使轮毂的质量降低和应力分布更加合理,而且轮毂结构的抗振性也得到了改善,该优化结果现已被工程生产所采用。

商用车轮毂设计中有限元分析技术的应用

一些生产商设计车轮毂结构时多延用传统的方法,会产生较多的冗余材料,不仅影响到材料成本控制,还导致了轮毂重量较大,整车的总质量也因此受到了影响,无法达到节能的目的。该文建立了轮毂的有限元分析数学模型,首先结合某商用车轮毂的结构特点借助UG软件建立3D型,然后通过Patran软件划分网格并加载相关的工况条件,最后借助nastran加以求解,对优化前后的轮毂性能进行分析比较,可以为轮毂的优化设计提供了一种新的方法。

Primary studies on integration optimization of differential steering of electric vehicle with motorized wheels based on quality engineering

The model of the differential steering system(DSS) of electric vehicle with motorized wheels and the three-degree-of-freedom dynamic model of vehicle are built.Based on these models,the concepts and quantitative expressions of steering road feel,steering portability and steering stability are proposed.Through integrating the Monte Carlo descriptive sampling,elitist non-dominated sorting genetic algorithm(NSGA-II) and Taguchi robust design method,the system parameters are optimized with steering road feel and steering portability as optimization targets,and steering stability and steering portability as constraints.The simulation results show that the system optimized based on quality engineering can improve the steering road feel,guarantee steering stability and steering portability and thus provide a theoretical basis for the design and optimization of the electric vehicle with motorized wheels system.