复合材料翼面结构载荷测量及温度修正技术研究  

Study on load measurement and temperature correction technology of composite wing structure

作　　者：朱江辉[1] ZHU Jianghui(Chinese Flight Test Establishment,Xi’an 710089,China)

机构地区：[1]中国飞行试验研究院,陕西西安710089

出　　处：《中国测试》2023年第7期101-111,共11页China Measurement & Test

摘　　要：为修正飞行载荷测量时复合材料结构受湿热环境影响作用,提高载荷测量的精准度,开展复合材料翼面结构载荷测量的修正技术研究。首先,综合考虑湿热环境变化引起的作用,通过分析正交各向异性复合材料的本构模型,建立复合材料湿热力环境应变分离方法。进行碳纤维复合材料平尾盒段温度-载荷试验研究,得到不同应变改装方案下电桥热输出规律以及应变电桥响应系数随温度变化规律。针对飞行试验条件,给出复合材料翼面结构载荷测量受温度影响的定量分析结果及其修正方法,并建立载荷修正方程。结果表明,所构建的修正方法,可明显提高载荷测量精准度。In order to correct the influence of humid and thermal environment on composite structure during flight load measurement and improve the accuracy of load measurement,the modification technology of composite wing structure load measurement was carried out.Firstly,by analyzing the constitutive model of orthotropic composite material,a method for separation of strain in humid thermal environment was established.The temperature-load test of carbon fiber composite flat tail box was carried out,the thermal output law of the bridge and the variation law of the strain bridge response coefficient with temperature under different strain modification schemes are obtained.In view of the flight test conditions,the quantitative analysis results and correction methods of the influence of humidity and heat on the load measurement of composite wing structure are given.The results show that the precision of load measurement can be improved obviously by the proposed method.

关 键 词：复合材料 湿热环境 应变电桥 机翼盒段 载荷测量 

分 类 号：V217[航空宇航科学与技术—航空宇航推进理论与工程] TB9[一般工业技术—计量学]