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首页> 外文期刊>Journal of Spacecraft and Rockets >Modeling of Triangular Lattice Space Structures with Curved Battens
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Modeling of Triangular Lattice Space Structures with Curved Battens

机译：弯曲板条的三角形格子空间结构建模

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摘要

Lightweight triangular lattice beams containing longerons, curved battens, and diagonals have been selected for many space structure applications, such as the supporting booms of future solar sails. The curved battens provide the flexibility needed for the booms to be twisted (coiled) and compressed to a small packing volume for reducing the launch cost. An integrated modeling technique for the analysis of triangular lattice beams with curved battens is presented. This modeling technique is used to simulate the assembly process of a lattice beam and to account for the assembly induced prestresses as well as the curvature of the battens in the subsequent loading response analysis. A key element of this integrated modeling technique is the implementation of a nonlinear cable-pulley element in a general-purpose finite element code. Finite element models representing different assembled-structure configurations were developed for investigating the effects of design variations on the load-carrying capabilities. The results indicate that both the curvature of the battens and the prestress state need to be modeled correctly for an accurate prediction of structural response. It is also shown that the loading capabilities of lattice beams can be significantly reduced if the cable diagonals are not constrained and are allowed to slide freely at the batten-longeron joints.
机译：对于许多空间结构应用，例如未来太阳帆的支撑吊杆，已经选择了包含纵梁，弯曲板条和对角线的轻型三角格梁。弯曲的板条为吊杆扭转（盘绕）并压缩到较小的包装体积提供了所需的灵活性，从而降低了发射成本。提出了一种用于带弯曲板条的三角格子梁分析的综合建模技术。这种建模技术用于模拟晶格梁的组装过程，并在随后的荷载响应分析中考虑组装引起的预应力以及板条的曲率。这种集成建模技术的关键要素是在通用有限元代码中实现非线性电缆滑轮要素。为了研究设计变化对承载能力的影响，开发了代表不同组装结构配置的有限元模型。结果表明，板条的曲率和预应力状态都需要正确建模，以准确预测结构响应。还显示出，如果不限制电缆对角线并允许其在板条-纵梁接头处自由滑动，则可以显着降低晶格梁的承载能力。

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