测试装置重量对身管直线度测量精度影响分析

摘要

With the application of composite materials in the defense industry, the straightness measurement of composite material barrel becomes an technical issue that needs to be solved urgently. Traditional equipment used for steel pipe straightness measurement causes larger er-rors in composite material barrel straightness measurement. Therefore, finite element analysis software ABAQUS is used to analyze the composite material barrel deformation under different load and different supporting conditions. The three-dimensional finite element model of the composite material barrel is established. The deformation of composite material barrel caused by different weight measuring equipment under different sup-porting conditions of composite material barrel is obtained. Corresponding test is designed to prove the validity of the finite element analysis re-sults. It is proved that the weight of equipment and the different supporting conditions oif barrel have significant influence on the composite materi-al barrel straightness measurement accuracy. Therefore we can reduce the influence of test equipment weight by changing the different supporting conditions of barrel. The relationship between barrel deformation and test equipment weight is obtained by using the method of data fitting, and it provides theoretical basis for the design of straightness measurement system of composite material barrel.%随着复合材料的广泛应用，复合材料身管直线度测量成为亟待解决的工艺难题，传统用于钢管直线度测量的装置将会引起较大的复合材料身管直线度测量误差，为此，应用ABAQUS有限元分析软件对处于不同载荷、不同支撑条件下的复合材料身管变形进行分析，建立复合材料身管三维有限元模型，分析得到不等重的测试装置在身管不同支撑条件下引起的复合材料身管变形量大小，设计相应试验验证有限元分析结果的正确性。结果表明测试装置自重及身管不同支撑条件对复合材料身管直线度测量精度产生重要影响，因此可以通过改变身管的支撑条件来降低测试装置自重的影响。采用数据拟合得到身管变形量和测试装置重量之间的关系，为复合材料身管直线度检测系统设计提供理论依据。