大开口型船舶在不规则波中的波浪扭矩预报分析

Prediction of Wave Torsional Moment for Large Opening Ship in Irregular Waves

综述了现有船舶波浪扭矩的计算分析方法，用STF切片理论方法计算了大开口船舶波浪扭矩的传递函数。根据不同波谱理论模型对不规则波中的扭矩作了统计预报，讨论了波浪扭矩予报对波谱的敏感性。研究结果表明，波浪扭矩对波谱谱型的依赖程度相当大；特征波浪周期对统计值的影响比有义波高大；对相同有义波高，PM谱相应的预报值比ITTC二参数谱的结果更偏于保守。

This paper reviewed present motheds of wave torsional moment calculation . Computed the transfer function of wave torsional moment for large opening ship, using STF strip theory.Predicted statistical values of wave torsional moment in irregular waves, based on different wave spectral models, and discussed the sensitivity of wave torsional moment depend on wave spectral. It's shown that wave to rsional moment depend tomuch degree on wave spectral; effect of wave period to statistical values is more important than significant wave height; under the same significant wave height, predicted values using the Pierson-Moskowitz spectral is more conservative than ITTC spectral.