某浮空器抓手结构力学性能仿真与试验

浮空器抓手结构对维持囊体在外载荷下的平衡与稳定起关键作用.文中提出了一种基于褶皱仿真的浮空器抓手结构力学性能分析方法.以尾翼梯形抓手为研究对象,建立其有限元模型与主要力学参数.对尾翼抓手在面内拉伸载荷下的变形机理进行了分析.根据梯形抓手的成形特点,分析了结构典型的破坏方式并预测了破坏载荷.开展了抓手结构破坏试验,从膜面变形、破坏位置和破坏载荷方面验证了仿真方法的有效性.文中的分析方法和结果可以为提升现阶段浮空器抓手的设计效率和设计质量提供技术基础.

Simulation and Experiment of Mechanical Properties of Load Patch Structure of an Aerostat

The load patch structure of aerostat plays a key role in keeping balance and stabilization of the hulls under external loads. One method for the mechanical properties analyses of the aerostat load patch structure based on wrinkling simulation is proposed in this paper. A finite element model of a trapezoid empennage load patch is established and its main mechanical parameters are given. Then, simulation analysis is carried out for the deformation mechanism under in-membrane tensile load of the trapezoid load patch. According to the forming manner of the load patch, typical failure modes of the structure are analyzed and corresponding failure loads are predicted. Finally, damage tests for the load patch structure are carried out to verify the effectiveness of the simulation method from aspects of membrane surface deformation, damage position and failure load. The proposed analysis method and its results could provide technical basis for enhancing the efficiency and quality of current aerostat load patch design.