【作者】 石卫华；

【导师】 关富玲；

【作者基本信息】 浙江大学 ， 结构工程， 2003， 硕士

【摘要】 随着科学技术的发展和人类对太空的探索不断深入，可展开结构越来越广泛的得到应用。伸展臂是最基本的可展结构，作为一种有效的支撑结构，可以作为大型可展开天线、太阳帆和望远镜的支撑背架、太空机械手以及空间平台等，已经得到了广泛的应用。本文对索杆式展开结构的结构设计和结构特性等分析理论进行了研究。 首先对国内外伸展臂的研究现状进行了总结，对展开结构常用节点进行了分析，并对以后的发展趋势进行了探讨。 总结了展开结构设计的基本原理和方法，阐述了主要技术指标，概括了设计步骤。提出了一个索杆式展开结构的设计方案，详细讨论了单元的展开机理。设计了节点和杆件，并加工制作了相应的结构模型。 展开结构具有与其他结构具有不同的特性，刚度是结构的主要要求，本文对索杆式伸展臂的频率进行了分析，并对不同参数对结构频率影响进行了分析，根据分析结果对结构设计加以改正。并对结构的频率响应进行了分析。根据连续力学原理推导了结构抗弯刚度、轴向刚度、抗剪刚度公式。 骨架式膜结构是目前应用最广泛的的膜结构，本文运用非线性有限元理论，将找形后的膜面覆盖在骨架结构上，膜面与钢结构组成整体，采用非线性有限元方法对骨架式膜结构在自重和自应力、风荷载、雪荷载等共同作用下的反应进行了分析，对膜结构和骨架结构分开计算和整体计算模型进行了比较。 最后对上述研究成果进行了总结，提出以后要解决的问题。更多还原

【Abstract】 With the development of science and technology and incessant exploring outer space,the deployable structures are being used widely Masts are basic deployable structures,being a effective supporting structures,masts are often used for separating electronic instruments to reduce interference or supporting other structures such as deployable antennas,solar arrays,telescope,outer space manipulator,outer space flat roof. Structural Design and Structure speciality analysis theory have been studied in this dissertation.firstly,the state and abroad research actuality of masts are summarized,and the nodes used in deployable structures are analysed,the developing tendency are discussed in this dissertation.The basic design theory and method are summarized,and primary technique requirements are illustrated,the design process are generalized. A design project of rod-cable deployable structures is put forward. The deployable mechanism of a modular is discussed particular. The detailed construct! on of nodes and bars are designed,and the deployable structures model is made accordingly.The deployable structures are different from other structures,and primary structures requirements are stiffness. The frequency of rod-cable deployable mast is analyzed,and various parameters’ effect on structures frequency is analyzed,based on analysis results the design project is rectified. Frequency response analysis has been performed for the mast. According to Mechanics theory the formulary of flexural rigidity,axial rigidity,shearing rigidity are deduced.The framework membrane structures are widely used present. The nonlinear finiteelement method is used in this dissertation,after form-finding the shape are overlapped the framework structure,the shape and the framework structure make up integrality structure,The nonlinear finite element method is employed,due to deadweight and wind load and snow load and self-stressing the response of the framework membrane structures are analyzed,and computation results of integrality model and dividing model have been compared.At the end of this dissertation some conclusions are reached and the problems that should be studied further are put forward.更多还原