Measurement method of flexibility coefficient of large deformation elastic model

Abstract

The measurement method of flexibility coefficient is to apply load step by step with a quantitative loading system, and measure the flexibility coefficient by "fixed-point loading, multi-point measurement". In the case of deformation, the deformation value of the measured point of the model is measured to calculate the flexibility coefficient. However, when facing the large-scale flexible model, if the model is subjected to large load, the free end of the model will produce large deformation; Using the above loading and measuring methods will cause errors between the actual and target measuring points. The surface density function is constructed according to the measured data, and the actual measured points are extracted by the method of measuring point regression. Based on the coordinates of the undeformed model, the deformation of the actual measuring point and the target measuring point is obtained, and then the region containing all points is constructed according to the actual measuring point and the target measuring point, and the load of the target measuring point is calculated using the node load equivalence principle, and the model flexibility coefficient is finally obtained.