Spatial complex flexible structure multi-body system dynamics modeling and calculating method

Abstract

The invention provides a spatial complex flexible structure multi-body system dynamics modeling and calculating method. The method comprises the steps of 101, building a three-dimensional model and giving parameters; 102, performing mesh generation on the model; 103, calculating a mesh unit generalized coordinate vector q and a generalized velocity vector; 104, building a mesh model constraint equation; 105, according to the mesh unit type, the generalized coordinate vector, the generalized velocity vector and the constraint equation, building a multi-body system dynamics equation on the basis of a first-class lagrange equation; 106, calculating the built multi-body system dynamics equation, and completing modeling calculating of the spatial complex flexible structure multi-body system dynamics problem. The simple and effective dynamics modeling method is provided for the flexible structure multi-body system, and the calculating efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of space structure dynamics calculation, and in particular relates to a dynamic modeling and calculation method of a complex space flexible structure multi-body system. Background technique [0002] In recent years, the development of my country's aerospace science and technology urgently needs to master the on-orbit deployment technology of flexible space structures to meet the major needs of satellite communications, space-based earth observation and deep space exploration. This type of space structure is generally composed of rigid rods, flexible beams, plates, shells, and flexible ropes. In addition to the position constraints at the hinge nodes, there are also a large number of nonlinear constraints such as synchronization and slip between the components. At the same time, this type of spatial structure has a large deployment scale, many soft parts, and complex configurations. The deployment process wil...

AI Technical Summary

Problems solved by technology

Usually, this method can only deal with the large deformation and large displacement of the flexible structure by increasing the number of elements in a large amount, which leads to large calculation scale and low calculation efficiency.

In addition, this method cannot accurately reflect the mechanical properties of complex flexible structures during the unfolding process.

Due to the existence of many nonlinear constraints, kinematic joint gaps and complex load conditions in multi-body systems with complex space and flexible structures, current commercial software has many difficulties in system dynamics modeling and numerical solution efficiency.

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