Damage Analysis of Reusable Rocket Engine Turbine Disk Considering Ratchet Effect

SUN Yujian; DU Dahua; WANG Jun; LI Binchao; XU Zili

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Damage Analysis of Reusable Rocket Engine Turbine Disk Considering Ratchet Effect

更新时间：2025-12-08

- Damage Analysis of Reusable Rocket Engine Turbine Disk Considering Ratchet Effect
- JOURNAL OF XI’AN JIAOTONG UNIVERSITY (2025)
- 作者机构：
  
  1.西安交通大学复杂服役环境重大装备结构强度与寿命全国重点实验室，710049，西安
  2.西安交通大学航天航空学院，710049，西安
  3.西安航天动力研究所液体火箭发动机技术重点实验室，710100，西安
- 作者简介：
- 基金信息：
- DOI：
  CLC： V434.211
- Received：31 October 2025，
  
  Revised：2025-12-05，
  
  Accepted：08 December 2025，
- 稿件说明：
移动端阅览
SUN Yujian, DU Dahua, WANG Jun, et al. Damage Analysis of Reusable Rocket Engine Turbine Disk Considering Ratchet Effect[J/OL]. JOURNAL OF XI’AN JIAOTONG UNIVERSITY, 2025.
DOI：

SUN Yujian, DU Dahua, WANG Jun, et al. Damage Analysis of Reusable Rocket Engine Turbine Disk Considering Ratchet Effect[J/OL]. JOURNAL OF XI’AN JIAOTONG UNIVERSITY, 2025. DOI：

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。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

A structural damage analysis is conducted on turbine disks under repeated mission cycles of reusable liquid rocket engines

addressing the ratcheting effect induced by cumulative plastic strain from asymmetric cyclic stresses. Based on the Chaboche kinematic hardening model

the mechanical response of the turbine disk under cyclic loading is characterized

and the ratcheting behavior of the structure is systematically analyzed in combination with the stress-strain evolution law. By quantifying the damage caused by the ratcheting effect

the structural damage state is assessed using the linear cumulative damage theory. The research results show that: under simulated multiple start-stop conditions

the region at the root of the blade trailing edge is at higher risk of failure; in the damage assessment

ratcheting damage is maximal in the initial cycles and then gradually decreases to stabilize; cumulative ratcheting damage evolves nonlinearly during the cycles

with the damage increment gradually decreasing as the number of cycles increases; During the 10 cycles

as the incremental strain of the ratchet decreased

the proportion of ratchet damage gradually decreased

while the proportion of fatigue damage gradually increased to over 96% with the number of cycles. This study provides a theoretical analysis foundation for the damage assessment of reusable rocket engine turbine disk.

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references

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