Shape Optimization Analysis Of Tensegrity Structure

In order to minimize the cost of building a tensegrity structure, scholars had done many researches, but steel used in each square was very small, there was little using of the work to reduce material dosage. Actuators were introduced into the structure for varying the structure's shape in this paper,ensure the structure at it's best at any time. The primary work in this paper was establishing the optimization model and then gain the needed active displacements of the actuator.The reasonable working state coefficient of the structure was defined, the synthetical stiffness between member and actuator was derived and the nodal displacement equation refer to the actuators' active displacements were established. Then the research gone along with two point, one was structure's intensity, the other was rigidity.The strength optimization was established for minimizing the maximal endogen force subjecting to the limited nodal displacement, cable stress and working parameters of the actuator. And the stiffness optimization was intent to minimize the maximal nodal displacement which was subjecting to the cable stress and working parameters of the actuators. The result indicated that we could reach the objectives of minimizing the interior force and enhancing the stiffness if actuator was installed in the cable. The compression bar's extent should not to be changed.The relationship between the regulate capability to working parameters of actuator and external force was consanguineous. Parameter analysis indicated that structure have stronger regulate capability if the actuator have bigger parameter. But we need to select the most reasonable actuator for particular cable so as to get the optimal economic effect. And the conclution could help us choose the best one.Tensegrity structure show distinct geometric nonlinear character, only resort to the iterative method we could get accurate result. A new intensity optimization model was developed by the idea of load-increment method combinewith Newton method to solve nonlinear problem. we can get the accurate result through solve it. In the foundation of academic analysis, a cyber-program, NLSTATS_opt, was compiled.In the process of regulation, nodal position was changing time and time, the structure's geometric stability need to be rasearched. Forerunners' research harvest was summarized in the paper, and it was used in the program, so that we could estimate structure's geometric stability at every iterative step.At the end of this thesis, the research essential was summed up and some future studies for intelligent structure were proposed.