Structural Configuration And Stiffness Analysis Of Star-type Tensegrity

In this paper,we construct a tensegrity structure with "end face" as "Star" type and study its advantages compared with the traditional tensegrity structure,and analyze the topological feasibility of multi-layer structure.Firstly,the connection matrix is obtained from the node vector matrix,and finally the vector matrix of the rod and cable is obtained.The construction process of the whole structural model of the tension is given.Based on the principle of exhibition,the two methods of the whole structure of tensegrity are analyzed,and the relationship between parameters is solved.According to the equivalent principle of internal force,the horizontal cables in series are equivalently replaced by the parallel form of horizontal cable.The replaced end cables are star-shaped,and the central axis component connected with the upper and lower ends of the star type is added to make the structure more stable.Then,according to the different forces of the central component of the "Star" structure,it is divided into two types of central cables and central rods.Using the force density method,the torsion angle of the steady state is obtained and the correct twist angle is obtained.The height of the central node and the length range of the central component in the stable state are given,and the correlation between the structure and the geometric parameters is analyzed.Then,by changing the length of the central components,the variation of the stiffness of different "star" type structures can be obtained,and the structural parameters with the highest stiffness can be determined and compared with the traditional structure.The stiffness of the structure before and after the topology is compared under the condition that the parameters of the prestress and the structure material are not changed,and the force characteristics of the topology are analyzed.The influence of prestressing parameters on the geometry of the structure is analyzed.Finally,using the Ansys software,the static analysis of the "Star" tensioned integral structure of the central rod member and the central rope member respectively is carried out,and the displacement and the joint force of the node of the structure are obtained.According to the topological way of unit structure,summarize the characteristics of regularity,continue to the multi-layer structure topology,and analyze the N-layer topology feasibility of thestructure.