基于实测数据的飞机高压液压导管应力分析及结构优化
Stress Analysis & Structural Optimization on High-Pressure Hydraulic Pipe of Aircraft Based on Real Data

飞机液压导管受机体变形、发动机开车以及带应力装配等因素影响，应力状态频繁变化，严重影响到液压系统功能的实现，甚至会给飞机安全带来隐患。针对飞机高压液压导管应力数据难以采集、数据分析方法选择困难及结构优化依据缺乏等问题，开展导管应力分析及结构优化研究。首先，分析飞机高压液压导管应力分析及结构优化全过程，考虑数据采集、数据分析及结构优化不同要素，提出一种基于实测数据的飞机高压液压导管应力分析及结构优化框架模型；然后，在飞机液压导管应力准确测量的基础上，通过数据预处理、数据转换、特征识别等数据分析方法判定应力超限导管，进而实现导管结构优化；最后，以一种飞机的高压液压系统为例，验证了所提方法的可行性和有效性。
The stress state of aircraft hydraulic pipe changes frequently due to the body deformation, engine driving and stress assembly, which seriously affects the function realization of the hydraulic system and even brings hidden dangers to the aircraft. In view of the difficulty in stress data acquisition, data analysis and structure optimization, the research of stress analysis and the structural optimization for hydraulic pipe is carried out. Firstly, the whole process of stress analysis and structural optimization for high-pressure hydraulic pipe is analyzed, and a frame model based on real data is proposed considering different elements of data acquisition, data analysis and structure optimization. Then, after stress data of aircraft hydraulic pipe is measured accurately and reliably, stress overlimit pipes are determined through data preprocessing, data conversion, feature recognition and other analysis method, so as to optimize the pipe structure. Finally, taking an aircraft high-pressure hydraulic system for example, the feasibility and effectiveness of the proposed approach are verified.