Rotor tip assembly clearance overproof risk estimation method considering machining precision and assembly process uncertainties

IF 5.8 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-09-26 DOI:10.1016/j.ast.2025.111011

Yingzhi Zhang , Huibin Sun , Wanxuan Liu , Kai Chen , Cheng Yan

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引用次数: 0

Abstract

Rotor tip assembly clearance (RTAC) is a critical assembly precision index of aero-engines. Accurately evaluating the overproof risk of RTAC has great significance for precision and safety control. However, existing evaluation methods fail to consider the uncertainties inherent in machining precision and assembly process execution. To address this issue, this paper proposes an overproof probability estimation method considering machining precision and assembly process uncertainties. Uncertainties related to RTAC are classified into random variables and interval variables. The independence of overproof conditions is analyzed, and the significance of different overproof behaviors is illustrated. The correlation between overproof limit functions under different behaviors is revealed. According to the mutual exclusivity of overproof conditions, the overproof probability is defined. Then, the RTAC prediction model is divided into three sub-models, and the overproof probability estimation method strategy is proposed. The feasibility of the proposed method is verified through a case study. The results provide more reliable reference for engineers in overproof risk evaluation and decision-making.

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考虑加工精度和装配过程不确定性的转子尖部装配间隙过盈风险估计方法

旋翼叶尖装配间隙是航空发动机重要的装配精度指标。准确评估RTAC的过防风险对其精度和安全控制具有重要意义。然而，现有的评价方法没有考虑加工精度和装配过程执行中固有的不确定性。针对这一问题，提出了一种考虑加工精度和装配过程不确定性的超证明概率估计方法。RTAC的不确定性分为随机变量和区间变量。分析了过防条件的独立性，说明了不同过防行为的意义。揭示了不同行为下超证明极限函数之间的相关性。根据过防条件的互斥性，定义了过防概率。然后，将RTAC预测模型划分为三个子模型，并提出了超证明概率估计方法策略。通过实例验证了该方法的可行性。研究结果可为工程师进行超防风险评估和决策提供更可靠的参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.