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中文摘要：
应用随机非线性动力系统理论，借助随机Melnikov方法及rate ofphasesPaceflux理论，从系统稳定性的角度分析了船舶在随机波浪上的运动稳定性．通过求相流函数的零点得到了船舶运动全局稳定性丧失时的海浪条件闽值，从而对船舶的抗倾覆能力做出定量的判断．
英文摘要：
By using the stochastic nonlinear dynamics theory, based on the stochastic Melnikov method and rate oi phase space flux theory, the dynamical stability of ships in random ocean wave and the method on reducing its capsizal are studied. Through calculating the zero of the rate of phase space, the threshold of the dangerous ocean wave condition is obtained. And the threshold can serve as an item to assess the capacity of the ship anti-capsizal.
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