The invention relates to a testing device based on a vortex-induced motion pull-type test and a testing method thereof, and belongs to the technical field of ocean platform tests. The device comprises a floating structure model, the floating structure model is located on the water surface, a plurality of one-way force sensors are arranged on the floating structure model in the circumferential direction, one end of each one-way force sensor is fixed to the floating structure model, and the other end of each one-way force sensor is connected with a light steel wire rope; the other end of the light steel wire rope is connected with a spring set after passing through a universal pulley, and the tail end of the light steel wire rope penetrates through a fixed pulley on a truss and then is fixed to a mooring point of a supporting rod. A trailer system is arranged on the water surface, and the floating structure model is matched with the trailer system and located below the trailer system; and a multi-degree-of-freedom motion measuring instrument is mounted on the floating structure model. The length of the steel wire rope and the spring set is determined by changing the height of the truss, the pretension of the spring system is adjusted by changing the position of the mooring point or shrinking the length of the steel wire rope, the test process is convenient, and the vortex-induced motion test capacity is greatly improved.

本发明涉及一种基于涡激运动拖曳式试验的测试装置及其测试方法，属于海洋平台试验的技术领域。它包括浮式结构物模型，浮式结构物模型位于水面上并沿周向布置多个单向力传感器，单个单向力传感器的一端固定在浮式结构物模型上，另一端与轻质钢丝绳连接；轻质钢丝绳的另一端通过万向滑轮后连接弹簧组，轻质钢丝绳的尾端穿过桁架上的定滑轮后固定在支撑杆的系泊点上；在水面上设置拖车系统，浮式结构物模型与拖车系统匹配并位于拖车系统下方；浮式结构物模型上安装多自由度运动测量仪器。本发明改变桁架高度确定钢丝绳和弹簧组的长短，通过改变系泊点位置或收缩钢丝绳的长短调整弹簧系统的预张力，试验过程方便，大幅度提高涡激运动试验测试能力。