文章对中性浮力地面实验系统中实验体的外形进行了设计.首先利用Fluent软件求解计算出几种可供选择的实验体外形在各种工况下的水动力系数,同时通过力矩系数给出几种外形的静稳定性；然后在对水阻力系数和静稳定性进行分析和对比的基础上,选择了正方体作为实验体的外形；最后对正方体实验体进行动力学建模及仿真分析,结果表明此外形实验体的水阻力可以被克服.由此说明从阻力能够被克服和具有良好的静稳定性的角度考虑,此外形可以作为较好的实验体外形选择.研究结果可为相关方面的进一步研究和设计提供依据.%The introduction of the full paper discusses relevant matters and points out that our preliminary exploration faces great difficulties. Sections 1 through 4 explain our preliminary exploration and its evaluation. Subsection 1. 3 gives a 7-step procedure for using Fluent software. Tables 1 and 2 in subsection 1.4 give the results of numerical simulation. Section 2 presents static stability analysis for experimental objects whose geometrical shapes are cylinders, spheres, and cubes respectively. Section 3, based on the results given in section 2, selects cubes as being suitable for the experimental objest. Subsection 3. 1 establishes the dynamic model of the experimental object. Figs. 1 through 6 in subsection 3.2 present the simulation results; in its last paragraph, subsection 3. 2 analyzes the results in Figs. 1 through 6. The core of sections 1 through 4 stated in a different form, consists of: (1) it calculated the hydrodynamic coefficients using Fluent software package to solve several alternative experimental body shapes in different conditions; (2) the static stabilities for these forms were given by analyzing the moment coefficients; (3) a right experimental object shape was selected based on analyzing and comparing the water drag coefficients and the static stabilities and also based on the requirement of some characters like stability and structure and so on; ( 4 ) the dynamical model of the experimental object was established; ( 5 ) it simulated the model and computed the water resistance; (6 ) the decision was made for the experimental object shape based on the requisition to that it can overcome the water resistance.
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