一种船用LNG管路管夹布局优化方法

船用LNG管路的应力大小和分布对于管夹的布局非常敏感，提出一种船用低温管路管夹布局优化方法，建立以管路应力为目标函数，管夹数量和位置为变量的优化模型，并提出一种基因同化-遗传算法。在该算法中，管夹的数量和位置可同时进行优化。将该方法应用于某LNG液相管路，有效的降低了管路的应力。

A layout optimization method for onboard LNG pipe support design

Due to the character of ultralow temperature of LNG, the stress of LNG pipe onboard is very sensitive to the layout of pipe supports. In order to improve the safety of LNG pipe and avoid structure damage such as yield and crack under complex loads, a Layout Optimization Method for Cryogenic Pipe Supports (LOMCPS) of LNG ship is proposed in this paper. The objective of LOMCPS is to deduce the structure stress, and both the pipe supports number and their distribution are taken as variables. Considering the specificity of LOMCPS, an improved Genetic Algorithms (GA) named Genetic Assimilation-Genetic Algorithms (GA-GA) is adopted in LOMCPS, in which a new factor named Magnetic Factor (MF) is introduced in mutation operation and the number of pipe supports is optimized by MF. LOMCPS is applied to a dual-fuel harbor tug, and the maximum stress of the LNG pipe is significantly decreased by the optimization of pipe supports.