考虑热-机械载荷的航发齿轮传动系统疲劳可靠性分析方法

doi:10.3901/JME.260094

摘要/Abstract

摘要： 齿轮传动系统是航空发动机的重要部件，长期处于热-机械载荷作用环境，其疲劳可靠性成为制约整机服役性能的关键因素。然而，现有航发齿轮传动系统可靠性评估方法没有考虑热-机械载荷的协同作用，难以准确评估热-机械载荷作用下齿轮传动的疲劳可靠性。考虑温升引起的疲劳强度衰减和载荷谱效应，提出了基于“疲劳寿命-运行历程”干涉的航发齿轮传动系统疲劳可靠性分析方法。发现相比于仅考虑机械载荷，热-机械载荷作用下传动系统关键构件的疲劳损伤有显著差异；进一步通过选取高强耐热钢的齿轮材料，显著提高了传动系统的疲劳可靠性。

关键词: 航空发动机, 齿轮传动, 热-机械载荷, 疲劳损伤, 可靠性

Abstract: Gear transmission system is an important component of aero-engines, operating under long-term thermal-mechanical load conditions. Its fatigue reliability has become a key limit on the service performance of machines. However, current reliability assessment methods of gear transmission systems do not consider the combined effect of thermal-mechanical loads, making them difficult to assess fatigue reliability. A fatigue reliability analysis method based on the "fatigue life-operation history" interference theory for aircraft gear transmission systems is proposed, considering fatigue strength degradation caused by temperature rise and the load spectrum effect. It is found that the fatigue damage of key components of the transmission system under the thermal-mechanical loading condition is significantly different compared with that under merely mechanical loading. The fatigue reliability of the transmission system under thermal-mechanical loading is improved by 21.5% through the selection of gear materials with high strength and heat resistance.

Key words: aero engine, gear transmission, thermal-mechanical loads, fatigue damage, reliability

中图分类号:

V233

路凯屹, 王曾, 王宪良, 卢泽华, 刘怀举. 考虑热-机械载荷的航发齿轮传动系统疲劳可靠性分析方法[J]. 机械工程学报, 2026, 62(3): 407-419.

LU Kaiyi, WANG Zeng, WANG Xianliang, LU Zehua, LIU Huaiju. Fatigue Reliability Analysis of Aero-engine Gear Transmission System Considering Thermal-mechanical Loads[J]. Journal of Mechanical Engineering, 2026, 62(3): 407-419.

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