湘江湘潭铁路桥水域的通航条件较为复杂，为了研究船舶通过此水域的安全航速，确保桥和船的安全，进行桥区水域航道的船模试验研究。根据相似准则制作1∶100正态定床水工模型和船模，模拟II级航道各典型船舶在此水域的航行状况。试验采用流场实时测量系统VDMS对船模运动进行快速检测，由其内置程序得到船模的漂角、漂距以及相应的航速。根据安全航行的原则，通过对试验成果的分析，提出了在最大通航流量Q=20 000 m³/s下，2 000 t 级自动船舶、2×2 000 t 级驳船队和4×1 000 t 级驳船队通过此水域的安全航速分别为：18.36~25.49 km/h，14.40~19.40 km/h和14.40~18.47 km/h。该研究方法可供同行参考，其研究可为航道管理部门及设计部门提供依据。

The navigation condition of the water area near Xiangtan railway bridge across Xiangjiang River is very complicated. To investigate the safe speed in this water area, we carried out simulation on the navigation of typical vessels in secondary channel in the water area around the bridge through 1∶100 normal fix-bed hydraulic model and ship model test. We adopted the VDMS(Vehicle Dynamic Matlab Simulink) to rapidly detect the movement of ship models, and obtained the drift angles, drift distances and the corresponding speeds through the system's build-in program. According to the principle of safe navigation and the analysis on test results, we found that under the peak discharge for navigation Q=20 000 m³/s, the safe speeds of 2 000 DWT self-propelled ship, 2×2 000 DWT pushed barge train and 4×1 000 DWT pushed barge train are, respectively, 18.36-25.49 km/h, 14.40-19.40 km/h and 14.40-18.47 km/h. This research could serve as a basis for waterway administration departments and design departments.