Abstract: The submergence depth of the floating dock is adjusted according to the ballast water and determined by the quantity of the ballast water in the ballast tank. And the length of the air pipe in the ballast tank is the key factor affecting the quantity of the ballast water. The length of the air pipe in the floating dock is very important to the ship performance, because too long air pipe will affect the lifting capacity of the floating dock, while too short air pipe will cause the floating dock to capsize. It focuses on the theoretical calculation method of the length of the air pipe in order to solve the problem of accurately positioning the length of the air pipe in the floating dock, which has been proved by the sinkage test in a full scale. The results can provide reference for the subsequent design and manufacture of the floating dock.

Key words: floating dock, ballast water, air pipe, calculation method, sinkage test

摘要： 浮船坞下潜深度是通过压载水调节来实现,压载舱内压载水量决定浮船坞的下潜深度,而压载舱内空气管长度是影响压载水量的关键因数。空气管过长会影响浮船坞的抬船能力,空气管过短则会导致浮船坞翻沉,所以浮船坞空气管的长度对船舶性能保障至关重要。为解决浮船坞空气管长度精确定位问题,该文着重对空气管长度进行理论计算方法研究,且通过实船沉浮试验论证,该研究成果可为后续浮船坞的设计与制造提供参考。

关键词: 浮船坞, 压载水, 空气管, 计算方法, 沉浮试验