ANSYS/PDS风电齿轮箱收缩盘联接可靠性分析

Reliability analysis on the shrink disc connection of a wind turbine gearbox based on ANSYS/PDS

笔者建立了某风电齿轮箱主轴收缩盘联接的轴对称参数化有限元模型,并结合主轴扭矩作用应用ANSYS非线性接触对该模型进行了强度分析。由于材料属性、制造过程、边界条件以及载荷等设计参数的不确定性会影响计算的精确性,应用ANSYS/PDS模块,根据失效模式确定整体功能函数并由此建立结构极限状态方程,采用蒙特卡罗超拉丁采样方法对收缩盘联接进行可靠性分析,得到整体联接的可靠度和失效率,并给出累积概率分布。研究结果表明:收缩盘传扭联接性能和结构件强度均满足设计要求,其联接的可靠度达到94.8%,达到了工程设计要求,对风电齿轮箱收缩盘联接的可靠性设计具有一定的指导意义。

An axisymmetric and parameterized finite element model for the shrink disc connection of a wind turbine gearbox was established.And the torque from the shaft was taken into consideration and the nonlinear finite contact software ANSYS was used to analyze the model＇s strength.As material properties,processing tolerance,boundary conditions and loading,etc.affect the accuracy of analysis,we used PDS module in ANSYS and based on structure failure mode to determine the structure function,and then set up a structure limit state equation.The reliability of the shrink disc connection was calculated with Latin hypercube sampling of Monte Carlo method,and its reliability,failure probability and cumulative distribution were obtained. The results indicate that the transmission torque and the strength of components meet design requirements and the reliability of the connection reaches 94.8%.It＇s hoped to provide some references for the design of shrink discs in wind turbine gearboxes.