双辐板涡轮盘/榫结构优化设计方法

Structural optimization design method of twin-web turbine disk with tenon

提出双辐板涡轮盘/榫三维结构优化设计方法,包括:以盘/榫总质量作为目标函数,分部管理的设计参数,盘/榫结构分部快速优化/整体精细优化策略;基于ANSYS软件,建立了双辐板涡轮盘/榫结构优化设计平台.针对某高压涡轮转子,设计了两种双辐板涡轮盘/榫模型,分析了盘缘喉部半径、盘缘厚度参数对盘/榫危险区应力的影响.优化结果表明:双辐板涡轮盘比单辐板涡轮盘应力分布更加均匀;在满足结构强度约束条件下,两种双辐板涡轮盘分别比单辐板涡轮盘减质19.90%和17.35%;对双辐板涡轮盘/榫模型进行优化,采用该优化设计方法的计算时间仅为采用常规三维优化方法的1/3,表明其优化设计方法的合理性及高效性.

A 3-D structural optimization design method for twin-web turbine disk with tenon was presented,covering strategies of partial speedy optimization/totality-subtle optimization for disk and tenon structure with total mass of disk with tenon as the objective function and the partial management of design parameters.The structural optimization design platform for twin-web turbine disk with tenon was established based on software of ANSYS. Two models of twin-web turbine disk with tenon were designed for a high-pressure turbine rotor.And the influence of basic parameters,such as radius of disk outside edge neck,thickness of disk outside edge,on the stresses of several critical points of disk with tenon was studied.According to the optimization results,the method presented is proved feasible,as the distribution of stress in twin-web turbine disks is more uniform than that in single-web turbine disk;the masses of two models of twin-web turbine disk are 19.90% and 17.35% lighter than that of the single-web turbine disk model under the condition of meeting structure strength criterions,while the calculational time for optimizing the twin-web turbine disk with tenon model by the method presented is just 1/3of that by the conventional 3-D optimization method.It is demonstrated that the method presented is reasonable and highly efficient.