基于Kresling折纸构型的空间结构可控失稳模式研究

基于Kresling折纸构型的空间结构受压时会发生多种失稳模式。为了实现破坏模式可控的智能结构，该文采用有限质点法对基于Kresling折纸构型的空间结构的失稳模式进行研究，提出通过调节该结构材料、预应力和结构布置的方法对结构刚度和失稳模式进行控制。该文建立了采用有限质点法进行索、杆、膜结构计算的基本流程，通过对Kresling双稳态失稳模式的分析验证了分析方法的有效性。对Kresling索杆模型、索杆膜模型、嵌套模型的失稳模式进行了分析，研究了弹性模量、预应力水平和结构布置对结构失稳模式和结构应变能的影响。实现了双层Kresling模型的失稳模式控制，为设计破坏可控的智能结构提供了一种新的方法。

PROGRAMMABLE INSTABILITY OF SPATIAL STRUCTURES BASED ON KRESLING ORIGAMI

A spatial structure based on the Kresling origami has multiple stability states under external compression. To realize an intelligent structure with a programmable failure mode, the finite particle method (FPM) is used to study the instability of spatial structures based on the Kresling origami. We propose a method of controlling the structural stiffness by adjusting the material, prestress, and structure arrangement. The calculation of the cable, rod, and membrane structures using the FPM is introduced. The method is verified by a bi-stability analysis of the Kresling pattern. The instability modes of the cable-rod model, the cable-rod-membrane model and the nested model based on the Kresling origami are analyzed. The influences of the elastic modulus, prestress level and structural arrangement on the structural instability mode and strain energy conversion are investigated. At last, the programmable failure of a double-layer Kresling structure is realized by adjusting the Young’s modulus of the structure, providing a new method for the design of intelligent structures in the future.