一种新型张力-杆系结构展开过程动力学研究

Deployment Dynamics Simulation of a Novel Tension/Rod Structural System

针对新型张力-杆系结构展开过程复杂导致动力学分析困难的问题,采用多柔体动力学方法,提出了张力-杆系结构的全新多体系统模型,实现了结构的展开过程仿真,研究了不同的绳索加载方式对桁架展开动力学行为的影响,总结了绳索力光滑加载方式的优势,揭示了桁架壁厚和绳索张紧力大小对张力-杆系结构展开过程的影响机理,结果表明杆件壁过薄及绳索张紧力过大均对结构展开过程中桁架受力产生显著影响。在此基础上,提出了张力-杆系结构的理论驱动力矩,给出了力矩与桁架杆件展开角度之间的关系,可以为电机选型提供参考。新型张力-杆系结构动力学分析为实际工程应用提供一种新的建模与仿真方法。

Concerning solving the problem that the complex deployment dynamics analysis of the novel tension/rod system structure,a multi-body model of the novel tension/rod structural system is proposed using the multi-flexible body dynamics.First,its deplorable process is simulated,and the effect of different cable loading methods on the hoop’s deployment dynamics behavior is studied;the advantages of the smooth loading method of the cable forces are summarized.Then,the effect of the hoop thickness and the magnitude of the cable tension force on the deployment dynamics of the tension-rod system structural system is analyzed.The results show that rod’s thickness and the excessive tensioning force of the cables can significantly affect the hoop’s strength during the structure deployment.On this basis,the theoretical driving moment of the tension/rod structural system is proposed.The relationship between the moment and the deplorable angle of the hoop’s rod is given,providing a reference for motor selection.The structural dynamics analysis of the novel tension/rod system provides a new modeling and simulation method for practical engineering applications.