Nowadays, all hydrodynamic testing devices of model ship are planar motion mechanism, thus limiting the measuring range of ship hydrodynamics, while a new hydrodynamic testing device of model ship, the six-DOF hydrodynam-ic testing device can expand it. It is introduced in three ways: the works of six-DOF platform, the method for determining the range of six-component balance, the total design. Firstly, the works of six degrees of freedom platform is introduced in detail,. that the correspondence between the movement of the six sports bars on the platform and the six freedom movement of a ship. Then establishing preliminary equations to calculate the forces and moments of the six freedom movement, and de-termining the range of six-component balance in the experiment device on the basis of specific technical performance of the planar motion mechanism at home and abroad. Finally, the overall structure of the experiment device is determined and the shape and size of the existing ship pool trailer platform are designed. On this basis, the specific structure and size of the trail-er frame, the three-dimensional schematic diagram, two-dimensional installation diagram and size diagram can be determ-ined, considering forces of the trailer platform and installation of the trailer platform and six degrees of freedom platform, and do structural strength analysis.%目前,国内外的船模水动力性能测试装置均为平面运动机构,使得船舶水动力导数的测量范围有限,而一种新型船模水动力性能测试装置,即六自由度船模水动力性能测试装置可以扩大这一测量范围.从六自由度平台的工作原理,六分力天平量程的确定和测试装置总体设计3个方面来具体研究和设计六自由度船模水动力性能测试装置.首先具体介绍六自由度平台的工作原理,即平台6根运动杆的运动与船舶六自由度运动的对应关系;然后建立船舶六自由度运动所受力和力矩的初步计算公式,以国内外平面运动机构的具体技术性能指标为依据,确定试验装置中的六分力天平的量程;最后确定测验装置的整体设计,设计出现有船池拖车平台的具体形状与尺寸.以此为依据,综合考虑拖车平台的受力情况及拖车架和六自由度平台的安装方式,确定拖车架的具体结构形式与尺寸大小,得到三维示意图、二维安装图与尺寸图,进行结构强度分析.
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