First, analyzing ship launching process and dividing ship launching process into three stages according to the actual circumstance.
先对船舶下水运动过程进行分析，根据实际情况将船舶下水过程分为三个阶段。
However, there is no feasible method for quantitative assessment of the strength of hull girder and safety of airbags during launching process.
近年采用气囊下水的船舶重量不断增大，下水安全性问题日益突出。
Then we analyzed the force acting on the hull during ship launching process, and established the ship launching model equation in mathematics at different stages.
然后对船舶下水过程中船体受力进行分析，建立不同阶段的船舶下水运动数学模型方程。
The launching process in interior ballistics is numerically simulated, the comparison of simulation results with experimental ones indicates that the simulation agreed well with the experiments.
利用该模型对电热化学发射内弹道过程进行了数值模拟，并将模拟结果与实验数据进行了分析比较，结果表明模拟结果与实验数据基本吻合。
The launching process in interior ballistics is numerically simulated, the comparison of simulation results with experimental ones indicates that the simulation agreed well with the experiments.
利用该模型对电热化学发射内弹道过程进行了数值模拟，并将模拟结果与实验数据进行了分析比较，结果表明模拟结果与实验数据基本吻合。
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