弯扭组合梁载荷测量试验研究

对金属结构进行载荷测量，应变法是常用方法之一。在弯矩、剪力和扭矩等单独作用下，利用应变法测得数据的准确性以及线性相关性都很好。而实际情况中，结构受力情况复杂，经常受到弯矩、剪力和扭矩等耦合作用，因此利用应变法测得的数据和输入载荷值生成的多元线性回归方程的线性相关性有待进一步验证。本文设计了一种典型的弯扭组合梁结构，在弯矩和扭矩的耦合作用下，利用应变法进行载荷测量，测量数据准确性很好，并且输入载荷值、弯矩和扭矩等多个变量生成的多元线性回归方程的线性相关性很强。

Experimental study on load measurement of flexural torsional composite beams

The strain method is one of the commonly used methods for load measurement of metal structures. The accuracy and linear correlation of the data measured using the strain method under the individual effect such as bending moment, shear force, and torque are very good. In reality, the structural stress situation is complex and structures are often subjected to coupling effects of bending moment, shear force, and torque. Therefore, the linear correlation between the data measured by the strain method and the multiple linear regression equation generated by the input load value needs further verification. A typical flexural?torsional beam structure is designed. Under the coupling effect of bending moment and torque, the strain method is used to measure the load. The accuracy of the measurement data is good, and the linear correlation of the multiple linear regression equations generated by multiple variables such as input load value, bending moment and torque is strong.