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| 1 | Design optimization of a wind turbine gear transmission based on fatigue reliability sensitivity显示文摘Fatigue failure of gear transmission is one of the key factors that restrict the performance and service life of wind turbines.One of the major concerns in gear transmission under random loading conditions is the disregard of dynamic fatigue reliability in conventional design methods.Various issues,such as overweight structure or insufficient fatigue reliability,require continuous improvements in the reliability-based design optimization(RBDO)methodology.In this work,a novel gear transmission optimization model based on dynamic fatigue reliability sensitivity is developed to predict the optimal structural parameters of a wind turbine gear transmission.In the model,the dynamic fatigue reliability of the gear transmission is evaluated based on stress–strength interference theory.Design variables are determined based on the reliability sensitivity and correlation coefficient of the initial design parameters.The optimal structural parameters with the minimum volume are identified using the genetic algorithm in consideration of the dynamic fatigue reliability constraints.Comparison of the initial and optimized structures shows that the volume decreases by 3.58%while ensuring fatigue reliability.This work provides new insights into the RBDO of transmission systems from the perspective of reliability sensitivity. | Genshen LIU Huaiju LIU Caichao ZHU Tianyu MAO Gang HU | 2021 | Frontiers of Mechanical Engineering2021，16，1： | 4 |
| 2 | 基于响应曲面法风电齿轮箱行星架拓扑优化设计显示文摘行星架是行星齿轮传动的关键性零件,行星架的自重、应力分布及形变量对行星齿轮啮合具有较大影响。为提高某型号风电齿轮箱行星架综合性能,基于响应曲面法进行拓扑优化,开展有限元分析,并以结构轻量化、减小最大Von Mises应力值及降低最大形变量作为优化目标,获得该型号行星架结构的最佳方案。最终拓扑优化结果表明,该型号行星架自重可降低2.35%,最大Von Mises应力值降低20.58%,形变量降低7.87%,行星架综合性能得到了改善。 | 雷林 丁明泽 胡洪伟 张敏 侯怡鑫 | 2022 | 重庆交通大学学报(自然科学版)2022，41，1： | 0 |
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