考虑棘轮效应的可重复使用火箭发动机涡轮盘损伤分析

孙羽键 ,  杜大华 ,  王珺 ,  李斌潮 ,  徐自力

西安交通大学学报 ›› 2026, Vol. 60 ›› Issue (8) : 240 -248.

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西安交通大学学报 ›› 2026, Vol. 60 ›› Issue (8) : 240 -248. DOI: 10.7652/xjtuxb202608021
专题 先进无损检测技术

考虑棘轮效应的可重复使用火箭发动机涡轮盘损伤分析

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Damage Analysis of a Reusable Rocket Engine Turbine Disk Considering the Ratcheting Effect

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摘要

针对可重复使用液体火箭发动机涡轮盘在多次启停工况下,由非对称循环应力引起塑性应变累积继而引发棘轮效应,从而严重影响结构寿命的问题,开展了涡轮盘在重复使用工况下的结构损伤分析。基于Chaboche随动强化模型,对涡轮盘在循环载荷下的力学响应进行表征,结合应力-应变演化规律系统分析了结构的棘轮行为。通过量化棘轮效应导致的损伤,结合线性累积损伤理论对结构损伤状态进行了评估。研究结果表明:多次启停工况中,涡轮盘出气侧叶型底部区域失效风险较高;棘轮损伤在初始循环周次最大,随后逐渐减小并趋于稳定;累积棘轮损伤在循环过程中呈非线性演化特征,损伤增量随着循环次数的增加逐渐减小;在10次循环中,随着棘轮应变增量减小,棘轮损伤的占比逐渐降低,疲劳损伤占比随循环次数逐渐提升至96%以上。该研究为可重复使用火箭发动机涡轮盘的结构损伤评估与寿命预测提供了理论分析基础。

Abstract

To address how the ratcheting effect—caused by cumulative plastic strain from asymmetric cyclic stresses under multiple start-stop cycles—seriously affects the structural life of reusable liquid rocket engine turbine disks,a structural damage analysis was conducted on turbine disks under reusable operating conditions. Based on the Chaboche kinematic hardening model,the mechanical response of the turbine disk under cyclic loading was characterized,and the ratcheting behavior of the structure was systematically analyzed in conjunction with the stress-strain evolution law. By quantifying the damage caused by the ratcheting effect,the structural damage state was assessed using the linear cumulative damage theory. The research results show that under multiple start-stop cycles,the trailing-edge blade root region is at a higher risk of failure. Ratcheting damage is greatest in the initial cycles and then gradually decreases before stabilizing. Cumulative ratcheting damage exhibits a nonlinear evolution with cycle number,as the damage increment gradually decreases over cycles. Over the 10 cycles considered,as the ratcheting strain increment decreases,the proportion of ratcheting damage gradually decreases,while the proportion of fatigue damage gradually increases to over 96% with cycle number. This study provides a theoretical basis for the structural damage assessment and life prediction of reusable rocket engine turbine disks.

关键词

可重复使用火箭 / 涡轮盘 / 棘轮效应 / 损伤分析

Key words

reusable rocket / turbine disk / ratchet effect / damage analysis

引用本文

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孙羽键,杜大华,王珺,李斌潮,徐自力. 考虑棘轮效应的可重复使用火箭发动机涡轮盘损伤分析[J]. 西安交通大学学报, 2026, 60(8): 240-248 DOI:10.7652/xjtuxb202608021

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