Roll Damping Prediction Method for a High-Speed Planing Craft
Roll Damping Prediction Method for a High-Speed Planing Craft
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发表时间：
2000
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通讯作者：
Y. Ikeda;T. Katayama
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作者：
Y. Ikeda;T. Katayama
通过受迫振动实验测量的高速滑行艇横摇阻尼表明，现有方法预测的阻尼明显低估了实验阻尼。这可能是因为预测方法没有考虑作用在飞行器上的垂直升力对阻尼的影响。基于准静态假设推导了预测垂直升力对侧倾阻尼的贡献的方法。利用测得的稳定速度运行的船舶的升力系数（取决于船舶的纵倾和上升），可以通过本方法近似预测横摇阻尼。经证实，预测结果与实测结果吻合较好。基于同样的假设，还推导了滑行艇升沉阻尼的预测方法。
The measured roll damping of high-speed planing craft by forced oscillation experiments demonstrate that the predicted damping by an existing method significantly underestimate the experimental ones. This may be because the effect of the vertical lift force acting on the craft on the damping is not taken into account in the prediction method. Methods to predict the contributions of the vertical lift force to the roll damping are deduced on basis of a quasi-static assumption. Using the measured lift coefficient of a craft running in steady speed which depends on trim and rise of it, the roll damping can be approximately predicted by the present method. It is confirmed that the predicted results are in fairly good agreement with the measured ones. A prediction method of heave damping of planing craft is also deduced on basis of same assumption.