Abstract

Based on the simplified mapping model of the geometric characteristics of a cobweb structure, a new umbrella-type deployable mechanism with a planar four-bar crank slider mechanism as the deployable unit is proposed. First, the model is statically analyzed and optimized using the Ansys Workbench software, and the optimal ratio of the spiral thread spacing in the model is determined. Additionally, the stiffness matrix of the cobweb rigid frame model is established, and the optimal angle between the spiral threads is determined using the matrix displacement method. Then, according to the optimized model angle and ratio, a new umbrella-type deployable mechanism is proposed, and its static performance is simulated and analyzed. The results show that the strength of the umbrella-type developable mechanism is improved, and the movement process is simulated to verify the effectiveness of the model deployment and folding process.

摘要

基于蛛网结构几何特性的简化映射模型，提出了一种以平面四杆曲柄滑块机构为展开单元的新型伞式展开机构。首先利用Ansys Workbench软件对模型进行静态分析和优化，确定模型中螺旋螺纹间距的最佳配比。此外，建立了蛛网刚架模型的刚度矩阵，并利用矩阵位移法确定了螺旋螺纹之间的最佳角度。然后，根据优化后的模型角度和比例，提出了一种新型伞式展开机构，并对其静态性能进行了仿真分析。结果表明，伞式可展开机构的强度得到提高，