下水计算 meaning in Chinese

launching calculation

At present , more and more large tonnage ships are built with the development of ship industry , the force between hull and shipway increased , the damage of ship structure was also reported . but the existed method is not efficiently for calculating the distribution of force acted on forward during stern floating which is the moment of truth during ship launching , so it is important to calculate ship launching precisely and take measure to preclude such accident
目前随着船舶工业的发展，建造船舶吨位越来越大，船体所受滑道反力随之增大，在实际生产过程中已有船体局部结构不同程度损坏的报道，而现有的下水计算方法在下水的最危险时刻艉浮时滑道反力的分布情况方面的计算显得不够准确，如何准确进行计算并采取相应的措施来防止这类问题发生显得十分重要。