Then , as such , the first goal toward maximum efficiency is obtained . the fifth part establishes the model to allocate flow machines in the assembly line according to above dock crane efficiency , furthermore , uses dynamic planning method to draw a final solution in order to reach maximum efficiency and minimum cost of the assembly line 第五章以门机分配为基础，建立流动机械的网络分配模型，对已经分配的门机作业量，在流动机械网络中进行再分配，并利用动态规划的方法进行求解，确定优化的工艺流程方案和机械类型、型号、数量的分配，从而实现效率最大、成本最低的优化目标。
Taking the cause analysis and its repair scheme optimization of the rotating platfome sleeve crack with the 16t / 33m gantry of the sixth harbour company of tianjin harbour as the main research line , the dissertation makes such researches as on the conception and method of caea of stevedoring gantry crane structure , which includes the generating and treating method , the controlling method on the units and meshes 本文以天津港第六港埠公司16t 33m门机转台筒体开裂的原因分析和修复裂纹方案优化为主线，研究了装卸型门机结构caea的概念和方法，包括模型的生成和处理的方法、单元和网格的控制方法等。
