Thickness and gravity are both the significant problems and challenges for origami structures in the field of building construction. This paper described a numerical folding analysis method to investigate the kinematic characteristics of thick origami using movable frame structural models driven by the external forces. The numeric methodology of the folding analysis is based on the generalized inverse theory. Therefore, both the morphing modes and the folding paths can be obtained in the environment of gravity through introducing the nodal forces directly. A general modeling approach is proposed to establish thick origami models using kinematic frames. To demonstrate the proposed method, single-DOF and multi-DOF examples are investigated. The folding procedures are obtained under the external forces, and the rigid motion modes are discussed. The presented method shows feasibility of analyzing the folding process of thick origami, which can help assess the practical rapid construction tasks in the future.

厚度和重力既是建筑结构领域中折纸结构的重要问题，也是挑战。本文介绍了一种数值折叠分析方法，利用外力驱动的可移动框架结构模型研究厚折纸的运动学特性。折叠分析的数值方法基于广义逆理论。因此，在重力环境下，可以通过直接引入节点力来获得变形模式和折叠路径。提出了一种通用的建模方法来使用运动学框架来建立较厚的折纸模型。为了证明所提出的方法，研究了单自由度和多自由度的例子。在外力作用下获得了折叠程序，并讨论了刚性运动模式。