内河锚泊浮式码头水动力性能分析

近年来内河水路运输飞速发展,浮式码头以其自身优势多运用于潮差较大的河段,由于浮式结构受风浪等环境因素影响较大,故对其水动力性能的研究至关重要。应用基于三维势流理论的水动力分析软件ANSYS/Workbench/AQWA建立浮式码头数值仿真计算模型,对浮式码头分别进行了频域分析和时域分析,考虑JONSWAP波浪谱与API风谱联合作用下浮式码头的运动响应,研究了不同的码头宽度和吃水深度对其水动力性能的影响。分析研究结果表明,浮式码头固有周期大约为3~8 s,设计时需注意避免固有周期与波浪遭遇周期接近,以免发生共振;浮式码头在高频区域内稳定性较好,但耐波性较差;适当增加浮式码头宽度、减小吃水深度可以减小其运动响应幅值,研究结果可为锚泊浮式码头的设计提供理论参考。

Hydrodynamic analysis of a moored floating pier on an inland river

In recent years, waterway transport on the inland river is springing up vigorously. With their own advantages, the floating piers are located on the river where the tidal range is larger. The floating piers are greatly influenced by the wave conditions, so it is very important to carry out the research on their hydrodynamic performance. A numerical simulation model is established by using a hydrodynamic simulation software ANSYS/Workbench/AQWA based on the 3d potential flow theory. Analysis of the floating piers is carried out in the frequency domain and time domain, predicting the dynamic response of the pier in JONSWAP spectrum and API spectrum. Effects of various parameters such as the beam and draft of the pier are also studied in this paper. Finally the analysis results show that the natural period of the floating pier is about 3～8 s. In the design, attention should be paid to avoid producing resonance when the natural period of the floating pier and the wave period are close. The stability of the floating pier in the high frequency region is better, but the wave keeping is poor. For stable operation of the floating pier, it is necessary to increase the piers width and reduce its draft appropriately. This study can provide a theoretical reference for the design of the similar floating piers.