Ship cabin layout problem is a multi-objective optimization problem. As the polymorphism and ambiguity in program evaluation, evaluation and optimization of ship cabin layout is very difficult. In this paper, evaluation index of cabin layout design is regarded as the activity of the cabin space utilization. Based on an improved genetic algorithm method, a mathematical model of ship cabin layout is set. The energy method is used to get feasible layout programs of the ship cabin. Through calculating the effective space utilization of various feasible layout programs and making a comparison among them, optimal solution can be obtained. Simulation tests show that this proposed approach is feasible and valid and the result is satisfied.%船舶居住舱室布局优化是一个多目标优化问题，由于居住舱室布局方案评价指标的多态性及模糊性，不利于船舶居住舱室布局方案的自动评价及优选。论文基于改进遗传算法建立船舶舱室布局优化数学模型，综合考虑舱室的采光性、舒适性等因素采用能量法实现舱室内待布置物的自动布局，并得到多个可行方案；最后，利用本文提出的船舶居住舱室有效活动空间利用率的概念，通过计算各个可行方案的舱室有效活动空间利用率，选出最优方案。仿真实验证明：该方法可行、有效，优化结果令人满意。
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