Belting connection structure contact friction nonlinear feature simulation method and system

Abstract

The invention provides a belting connection structure contact friction nonlinear feature simulation method. The method includes the following steps that S1, a three-dimensional finite element model of a basic section of a belting connection structure containing a single clamping block is established; S2, correction is conducted on the three-dimensional finite element model to obtain the corrected parameters; S3, a two-dimensional finite element model is established according to the corrected parameters; S4, correction is conducted on the two-dimensional finite element model, a final two-dimensional axisymmetric finite element model is obtained, and analog simulation is achieved. According to the method, a two-step model correct method is adopted, the accuracy of the two-dimensional nonlinear finite element model and the physical significance of all parameters of the model are guaranteed, fast and precise estimation of the belting connection structure nonlinear mechanical property is achieved, and the higher computing accuracy and efficiency are achieved. The invention further provides a belting connection structure contact friction nonlinear feature simulation system.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a method and system for simulating the non-linear characteristics of contact and friction of a taped connection structure. Background technique [0002] Tape connection structure is currently the most widely used form of star-rocket connection structure in the aerospace field. A typical tape connection structure such as figure 1 As shown, it is mainly composed of metal belts, explosive bolts, clamping blocks, satellite docking frames and adapters and other components. Among them, the metal belt, the explosive bolt and the block are the connecting parts, and the satellite docking frame and the adapter are the connected parts. During assembly, by tightening the explosive bolts, a pre-tightening force is applied in the two metal strips, and then a radial pressure is generated on the discretely distributed clamping blocks on the inner side of the metal strips along the circumfer...

AI Technical Summary

Problems solved by technology

However, the axisymmetric approximation introduces errors into this model, affecting the computational accuracy of the model

In addition, due to factors such as processing and assembly errors, there are many uncertain parameters in the actual structure

These uncertain parameters will also affect the accuracy of finite element simulation

[0006] At present, there is no discussion on the error source of the finite element model of the tape and the research on improving the simulation accuracy of the nonlinear characteristics of the tape contact friction through model correction. It is impossible to directly use the uncorrected finite element model of the tape connection structure for engineering problem analysis. Accurately predict the mechanical properties of the tape-wrapped structure and the dynamics of the space-rocket coupling

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