基于蜘蛛网结构的伞状可展机构设计与分析

摘要/Abstract

摘要： 根据蜘蛛网结构的几何特点，建立了蜘蛛网的结构简化映射模型。在此基础上，以平面四杆曲柄滑块机构为可展单元提出了一种新型伞状可展机构。利用ANSYS Workbench软件对模型进行静力学分析与优化，给出了蜘蛛圆网结构模型中捕丝间距的最佳比例关系；同时，建立了蜘蛛网刚架模型的刚度矩阵，利用矩阵位移法给出了捕丝间的最优夹角。基于捕丝间距的最佳比例和捕丝最优夹角，提出了受力性能最佳的伞状可展机构，并对其静力学性能进行了仿真分析。结果表明：基于蜘蛛网结构模型优化后的伞状可展机构强度性能得到提升。最后，设计制造了展开直径为1.2 m的可展机构模型，并对其运动过程进行模拟，验证了模型展开与收拢过程的有效性。

关键词: 蜘蛛网结构, 伞状可展机构, 最佳比例, 强度分析

Abstract: A simplified structure mapping model of spider web was established according to the geometric characteristics of spider web structures.Then, a new type of umbrella-type deployable mechanism was proposed using a planar four-bar crank slider mechanism as a deployable unit.The static analysis and optimization of the model were performed using ANSYS Workbench, and the optimal ratio of the pitch of the silk thread in the spider circle net structure model was given;at the same time, the stiffness matrix of spider web rigid frame model was established, the optimal angle between the filaments was given by matrix displacement method.Based on the optimal ratio of the spacing of spiral thread and the optimal angle of spiral thread, the umbrella-type deployable mechanism with the best stress performance was proposed, and the static performances were simulated and analyzed.The results show that the strength performance of the umbrella-type deployable mechanisms optimized based on the spider web structure model is improved.Finally，the model of the expandable mechanism with a diameter of 1.2 m was designed and manufactured, and simulation of the exercise processes, verified the effectiveness of the model expansion and collapse processes.

Key words: spider web structure, umbrella-type deployable mechanism, optimal ratio, strength analysis

中图分类号:

TH112

孙建伟；张世梁；孔凡臣. 基于蜘蛛网结构的伞状可展机构设计与分析[J]. 中国机械工程.

SUN Jianwei；ZHANG Shiliang；KONG Fanchen. Design and Analysis for Umbrella-type Deployable Mechanisms Based on Spider Web Structures[J]. China Mechanical Engineering.

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