| Tape spring hinge structure is an important component for connecting microsatellite solar panels.It is directly related to the success or failure of satellite performance and missions.Therefore,it is necessary to inquire into the mechanical attributes of tape spring hinge,and a reliable structural design based on this performance.On the other hand,with the continuous improvement of lightweight design requirements for aerospace missions,composite materials with advantages such as light weight,high specific strength,and high specific stiffness are well applied in aerospace missions,in order to better adapt to the development of aerospace tasks,the introduction of composite materials in the space deployment structure has become a current and future trend.Therefore,this research has important theoretical significance and high engineering application value for the analysis of mechanical attributes of tape spring hinge and the optimization design of deployable structure combined with composite material.This topic mainly studies tape spring hinge structure from the following aspects:(1)A mechanical model of tape spring is established,and the pure bending numerical simulation is carried out.Bending moment change law of tape spring is explored and compared with the classical bending moment theoretical curve;experimental platform is built to verify the numerical simulation results.On the other hand,through Sobol sensitivity analysis and primary and secondary factor analysis methods,parameter sensitivity analysis of the mechanical attributes of tape spring is performed,and the variation of mechanical attributes with geometric parameters(including length,radius,thickness and subtended angle)is further studied,and then key parameters that affect mechanical attributes of tape spring are determined;(2)A mechanical model of tape spring hinge structure is established,and influence of parameters of quasi-static numerical simulation method on the mechanical performance of tape spring hinge is analyzed.The key parameters of complete numerical method are determined in combination with calculation efficiency.Unfolding performance of tape spring hinge is analyzed and feasibility of the structure is verified through experiments.Key parameters affecting the mechanical attributes of tape spring hinge are determined by parameter sensitivity analysis method.Based on Response Surface Methodology,the single-objective and multi-objective optimization design models of tape spring hinge structure are established and solved.A complete established analysis method for designing,analyzing,verifying,and then designing for deployable tape spring hinge structure is obtained;(3)A mechanical model of tape spring structure with laminate composite material is established.Two-dimensional Hashin failure analysis is firstly used to predict the feasibility of the composite used in tape spring structure.Representative voxel model of the plain weave fabric is established by TexGen software.Then the equivalent elastic constants are obtained by homogenization method.The stiffness matrix of the woven composite material is calculated in combination with the classical laminating theory and one structure of the woven composite tape spring is built to investigate change law of mechanical attributes;a bi-stable layered tape spring structure model is established,and similarly the variation of mechanical attributes is studied.A multi-objective optimization design model of bi-stable tape spring hinge structure is established based on Response Surface Methodology,which model is solved by improved Non-dominated Sorting Genetic Algorithm and the feasible solution distribution is obtained,the results of which provid theoretical basis for engineering application.(4)Based on above analysis,and on ABAQUS platform,the bi-stable and woven composite tape spring modeling and analysis program is written using Python language and the modular design of parametric modeling and analysis for composite material tape spring is realized. |
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