An elastic calculation of ship launching has been developed for the structural safety of ship during launching operation.

为保证船舶下水过程中的结构安全，提出了一种船舶弹性下水计算方法。

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This paper presents the stability calculation for box culvert's launching into water with gas cushion combining an engineering project, the result of which can be used to guide construction.

结合工程实例，介绍直接利用气囊搬运箱涵下水时的稳定计算，并用计算结果指导施工。

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The reliability of moving time parameter was calculated about the launching equipment cap opening. The calculation result shows that the time parameter reliability is very high.

并具体计算了该发射装置顶盖开启运动时间参数的可靠度。由计算结果可知，时间参数具有很高的可靠度。

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