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MODELLING BUILT UP, TAPE SPRING BASED, SPACE DEPLOYABLE STRUCTURES

机译:建模建立,磁带基于Spring,Space Deplyable Structures

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Deployable structures are required for many satellite operations, to deploy booms for communications or area deployment for power generation, and many sophisticated mechanisms have been developed for these types of structures. However, tape springs, defined as thin metallic strips with an initially curved cross-section, are an attractive structural solution and hinge mechanism for satellite deployable structures because of their low mass, low cost and general simplicity. They have previously been used to deploy booms and array panels in various configurations that incorporate small two-dimensional tape hinges, but they also have the potential to be used in greater numbers to create larger, more geometrically complicated deployable structures. The aim of this work is to investigate a computationally efficient method of simulating these tape spring based deployable structures and to determine the limitations of the analysis approach. The study focuses on a specific deployable structure layout that incorporates 148 separate tape spring elements in three fold lines. The static and dynamic properties of the system are initially investigated experimentally allowing the basic parameters of the theoretical model to be determined accurately. It was found that the simulated tape pair stiffness was a key parameter affecting the dynamic properties of the model and the peak shock accelerations. It was concluded that the model was capable of closely simulating the dynamic 'snap through' behaviour of the wall. However, the torsional stiffness around the axis normal to the plane of the structure was found to be too large, resulting in over approximations of the peak shock accelerations.
机译:许多卫星操作需要可部署结构,用于部署用于发电的通信或区域部署的动力,并且为这些类型的结构开发了许多复杂的机制。然而,胶带弹簧定义为具有初始弯曲横截面的薄金属条,是卫星可展开结构的有吸引力的结构溶液和铰链机构,因为它们的质量低,成本低,总体简单性。他们以前已被用于部署繁荣和阵列面板,以包含小型二维磁带铰链的各种配置,但它们也有可能以更大的数量使用以产生更大,更加几何复杂的可部署结构。这项工作的目的是调查计算基于磁带弹簧的可展开结构的计算有效方法,并确定分析方法的局限性。该研究侧重于特定的可展开结构布局,其中包含三条折叠线的148个单独的磁带弹簧元件。最初研究了系统的静态和动态特性,实验地允许准确地确定理论模型的基本参数。发现模拟磁带对刚度是影响模型动态特性和峰值冲击加速的关键参数。得出结论,该模型能够密切地模拟墙壁的动态“弹力”行为。然而,发现沿着结构平面的轴线周围的扭转刚度太大,导致峰值冲击加速度的近似。

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