管路制造偏差传递建模与位姿精度不确定性分析

doi:10.3901/JME.2025.16.013

摘要/Abstract

摘要： 为开展航空发动机外部管路偏差传递建模和位姿精度不确定性分析，首先定义管路弯制的长度偏差、角度偏差、转管偏差，以及焊接长度偏差、翘曲角度和翘曲方向偏差，并结合偏差旋量表示方法建立管路制造偏差传递的指数积模型，进而基于行业标准GJB 3054—97具体化了卡箍安装位置和管路末端连接位置精度评价准则；在此基础上，进一步结合制造偏差均匀和正态概率模型开展管路关键点位姿精度不确定性分析，获得偏差分量对管路整体位姿精度影响的参数全局灵敏度。结果表明偏差旋量和指数积模型能够为管路制造偏差传递建模和位姿精度评价提供有效方法；含有九个制造环节的外部管路模型共需考虑36个偏差分量的耦合影响，其整体位姿精度合格率低于10%；首个弯制和焊接环节对管线整体位姿精度影响最为显著；就偏差类型而言，弯制角度偏差对管路位姿精度影响占比超过75%。为此，工程实践中应加强首个弯制和焊接环节及各环节角度的偏差控制，以提高外部管路整体位姿精度水平。

关键词: 外部管路, 弯制偏差, 焊接偏差, 偏差传递, 不确定性分析, 参数全局灵敏度

Abstract: In order to carry out deviation propagate modeling and pose accuracy uncertainty analysis of aeroengine external pipeline, the length deviation, angle deviation, rotating pipe deviation of pipeline bending, and welding length deviation, warpage angle and warpage direction deviation are defined firstly. Combined with the deviation screw representation method, the product-of-exponential model of pipeline manufacturing deviation propagate is established. Then, based on the industry standard GJB 3054-97, the accuracy evaluation criteria of clamp installation position and pipeline end connection position are specified. On this basis, the uncertainty analysis of the pose accuracy of the pipeline key points is further carried out by combining the uniform manufacturing deviation and the normal probability model, and the parameters global sensitivity of the influence of the deviation component on the overall pose accuracy of the pipeline is obtained. The results show that the deviation screw and exponential product model can provide an effective method for pipeline manufacturing deviation transfer modeling and pose accuracy evaluation. The external pipeline model with nine manufacturing links needs to consider the coupling effects of 36 deviation components, and the overall pose accuracy qualification rate is less than 10%. The first bending and welding link has the most significant influence on the overall pose accuracy of the pipeline. In terms of deviation type, the influence of bending angle deviation on pipeline pose accuracy accounts for more than 75%. Therefore, in order to improve the overall pose accuracy of the external pipeline, the deviation control of the first bending and welding links and the angle of each link should be strengthened in engineering practice.

Key words: external pipeline, bending deviation, welding deviation, deviation propagation, uncertain analysis, parameters global sensitivity

中图分类号:

V233

安鹏宇, 张意章, 刘中华, 邹德坤, 张旭方. 管路制造偏差传递建模与位姿精度不确定性分析[J]. 机械工程学报, 2025, 61(16): 13-27.

AN Pengyu, ZHANG Yizhang, LIU Zhonghua, ZOU Dekun, ZHANG Xufang. Uncertain Propagation and Analysis of Pipelines with Manufacturing Deviations[J]. Journal of Mechanical Engineering, 2025, 61(16): 13-27.

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