ABSTRACT

Currently, most existing studies and specifications for container stack and securing system are corresponding to static conditions. In this paper, we attempt to investigate the dynamic effects caused by hull movement on the stack and securing system. Based on Froude scaling laws, the four-tier 20-ft ISO container stack and lashing equipment scaled models are constructed. The physical and structural characteristics of the scaled models are determined by two dimensionless parameters: the gravity force/inertia force ratio, and the elastic force divided by inertia force. By inputting the sinusoidal excitation on the excitation device, a series of rolling tests were performed to study the effect of excitation, twist lock gap and payload on the dynamic response of the system. The experimental results are in a good agreement with the numerical simulation results. The results indicate that decreasing gap size and the proper cargo configuration can enhance the safety of the container stack.

摘要

目前，大多数现有的集装箱堆垛和固定系统的研究和规范都与静态条件相对应。在本文中，我们试图研究船体运动对堆垛和系固系统的动态影响。基于 Froude 比例定律，构建了四层 20 英尺 ISO 集装箱堆垛和绑扎设备比例模型。比例模型的物理和结构特性由两个无量纲参数确定：重力/惯性力比，以及弹性力除以惯性力。通过在励磁装置上输入正弦励磁，进行了一系列滚动试验，研究了励磁、扭锁间隙和有效载荷对系统动态响应的影响。实验结果与数值模拟结果吻合较好。结果表明，减小间隙尺寸和适当的货物配置可以提高集装箱堆垛的安全性。