摘要
以经验为主导的传统齿轮箱箱体的设计方法已逐渐无法满足大兆瓦风电齿轮箱的设计要求。基于此,利用拓扑优化和尺寸优化方法,以轻量化设计为目的,在提高强度和保证刚度的条件下对风电齿轮箱前机体进行结构优化设计。前机体的有限元分析表明,有必要对其结构进行优化设计;基于多位置工况建立前机体的静动耦合拓扑优化模型,根据拓扑优化传力路径获得概念模型;采用响应曲面法对概念模型的关键尺寸进行优化设计,通过筛选法得到最优尺寸。对优化前后前机体的性能进行比较,质量减少12.79%,第一主应力基本不变,刚质比提高7.19%,实现了结构轻量化的目的。
The traditional structural design of gearbox based on experience couldn ＇t meet the design requirements of large megawatt-level wind gearbox any more,base on this,by using the topology optimization and size optimization method,the front gearbox is optimized and designed for lightening its weight,improving its strength and stiffness.The finite element analysis of the front body shows that,it is necessary to optimize its structure.The topology optimization model of the front gearbox based on the multi-position load cases and multi-objective of static and dynamic performances is built,and the conceptual model is achieved based on the force path of topological optimization.The response surface methodology is used to optimize the critical dimensions of the conceptual model,and the optimal sizes are determined by screening.Comparing the performance of the new design one with the original,it is shows that the change of the first principal stress of front gearbox is very small,however,separately with the mass reduced by12.79% and the ratio of stiffness of the optimum scheme increases 7.19%.The purpose of the structural lightweight design is achieved.
出处
《机械传动》
CSCD
北大核心
2015年第11期50-53,共4页
Journal of Mechanical Transmission
基金
国家自然科学基金(51375065)
辽宁省科技创新重大专项(No.201303004)
"十二五"国家科技支撑计划(2012BAA01B05)
关键词
前机体
结构优化
概念设计
轻量化
Front gearbox Structural optimization Conceptual design Lightweight
