编织材料变截面双稳态弹性杆性能研究OA

The harsh limitations of space launch drive the space mechanism to develop to be lightweight and have a high folding ratio.The variable cross-section bistable elastic rod of woven material has the characteristics of light weight and high folding ratio,which can be folded and unfolded by driving,and has significant application potential in spatial structure.The purpose of this paper is to study the complex mechanical behavior of this kind of structure in the process of steady-state transformation.Based on the microscopic and mesoscopic multi-scale characteristics of woven materials,a new theoretical calculation model is established by modeling the mesoscopic scale,which provides an effective tool for accurately predicting its mechanical properties.Based on this model,the finite element model of the variable cross-section bistable elastic rod is further established,and the static analysis method is used to calculate and compare the steady-state radius before and after the steady-state transition during the flattening process.By modifying the basic parameters of the woven bimorph elastic rod with variable cross-section,a parametric study on the jump load during the flattening process of the woven bimorph elastic rod was conducted using finite element simulation.Following the parametric analysis,a sensitivity analysis is conducted.These studies have provided important basis for further optimizing the design and enhancing the structural performance and have laid the foundation for the application of woven material variable-section bistable elastic rods in aerospace and other fields.