风浪流作用下单船艏艉锚泊允许波高的试验研究

研究风浪、浪流和风浪流联合作用对275HP拖网渔船单船艏艉双锚锚泊时锚泊力和运动量的影响。试验结果表明,风浪作用下的锚泊力和横摇角度均大于纯浪作用的情况;流速小于1.0 m/s时浪流作用下的锚泊力大于纯浪作用的情况,而横摇角度则略小于纯浪作用的结果;风浪流联合作用下的艏艉拉力均大于风浪或浪流作用下的拉力值。由于渔船艏艉受风和受流面积的区别,导致艏拉力时流的影响较大,而艉拉力时则风的影响较大。由于流作用时渔船具有的初始横摇角度对其运动具有抑制,从而风浪流联合作用时的横摇角度要略低于风浪作用下的角度值。在本次试验范围内,当港内同时有10级左右风和小于1.0 m/s流速的流共同作用时,建议允许有效波高取0.6 m比较合适。

Experimental research on allowable wave height of bow-stern mooring of a single ship under combined action of wind,wave and current

This paper studies the mooring force and movement of 275HP bow-stern double mooring trawler under the action of wind and wave,wave and current or wind and wave and current.The experimental results show that the mooring force and rolling angle under the action of wind and wave are both higher than that under the action of wave.When current velocity is less than 1.0 m/s,the mooring force under the action of wave and current is greater than that under the action of wave,while the rolling angle is slightly less.Bow-stern tension force under the combined action of wind,wave and current is greater than that with the effect of wind and wave or wave and current.Because of the difference of bow-stern area of fishing boat affected by wind and current,the influence of current on bow tension force is greater and the influence of wind on stern is greater.Considering the inhibitory effect of the initial rolling angle of fishing boat on its motion,the rolling angle under the combined action of wind,wave and current is slightly lower than the value under the action of wind and wave.According to the experiment,the allowable wave height of 0.6 m is suggested when there are about force 10 wind and current with the velocity less than 1 m/s at the same time in the port.