充气薄膜桁架的协同折叠设计及展开过程仿真

充气薄膜桁架结构可应用于大型空间充气薄膜航天器的展开部件和支撑结构。研究了充气薄膜桁架结构的协同折叠设计方案，首先推导了蒙皮结构的折叠状态几何公式，然后设计充气桁架的折叠方案，以几何适应于蒙皮结构折叠状态。建立了协同折叠设计方法，并得到了参数化模型。方案实现了横向和纵向同时折叠，横向折叠率为267，纵向折叠率为882。基于改进的弹簧 质点系统，完成了充气薄膜桁架结构的充气展开动力学仿真，得到了展开动力学行为和参数。仿真结果表明展开过程平稳可靠，未发生各构件间的物理干涉，从而评估了协同折叠设计方案的合理性，为此类结构的工程应用提供了技术支撑。

Collaborative folding design and deployment simulations of inflatable membrane trusses

The inflatable membrane truss structures can be used in the deployable parts and supporting structures of large inflatable membrane spacecraft. A collaborative fold design scheme of inflatable membrane truss structures was studied. Firstly, the geometric relationship of the folded state for the skin structure was formulated. To be geometrically suitable for the folded state of the skin structure, the fold scheme of inflatable truss was designed. Thus the collaborative fold design method was established and the parameterized model was obtained. Synchronous folding in both horizontal and vertical directions was realized, with a horizontal folding ratio of 2.67 and a vertical folding ratio of 8.82. Based on the improved spring-particle system, the dynamic simulation of inflatable process of the inflatable membrane truss structures was completed. The dynamic behaviors and parameters of the inflatable process were obtained. The simulation results show that deployment process is stable and reliable without any physical interference among all components. The collaborative fold design scheme is proved to be useful and can provide technical support for the engineering application of this kind of structures.