And establishes a responding mathematical model for ship roll with analog modeling method and puts forward the concept of the indexes of rolling K1, T1;
采用类比建模的方法建立了船舶横摇响应型数学模型，并首次提出了船舶横摇指数K1、T1的概念；
The 4 degrees responding mathematical model for ships established in the paper is simpler than those conventional ship hydrodynamic mathematical models. And the precision also meets the requirements.
本文最终建立的船舶4自由度响应型数学模型比传统的船舶水动力数学模型更为简捷方便，且精度基本能满足要求。
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