基于改进遗传算法的船体板架结构优化设计
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摘要
为了有效降低船体板架振动幅度,针对当前船体板架结构,提出基于改进遗传算法的船舶板架结构优化方法。以遗传算法为核心,对当前船体板架结构优化设计变量求值,明确变量关系,划分当前板架结构元,根据船体板架不同部位的受力特征,将当前船体板架划分为梁元和壳元2个受力分区,通过弹性截面受力关系,确定其弹性系数,建立船体板架优化的目标函数,引入屈服强度和刚度2个参数,求取优化变量值,实现对当前船体板架结构的优化。实验数据表明,优化后的船体板架结构,横向振幅降低了23%,纵向振幅降低了29%,有效降低了船体板架振动幅度。
in order to effectively reduce the vibration amplitude of hull plate and frame, aiming at the current hull plate and frame structure, a ship plate and frame structure optimization method based on improved genetic algorithm was proposed. Genetic algorithm as the core, to the current hull grillage beam structure optimization design variables, clear relationship between variables, dividing the current frame structure yuan, according to the mechanical characteristics of the different parts of hull grillage beam, force partition Liang Yuanhe shell element divided into two, and through the elastic section stress relationship, determine its elasticity coefficient, to establish the objective function of the optimization of hull grillage beam,and the function of the introduction of yield strength and stiffness constraints to improve the optimized hull seismic parameters, calculate the optimization variable values, to realize the optimization of the structure of hull grillage beam. The experimental data show that the transverse amplitude of the optimized structure is reduced by 23% and the longitudinal amplitude by 29%, which effectively reduces the vibration amplitude of the structure.
in order to effectively reduce the vibration amplitude of hull plate and frame, aiming at the current hull plate and frame structure, a ship plate and frame structure optimization method based on improved genetic algorithm was proposed. Genetic algorithm as the core, to the current hull grillage beam structure optimization design variables, clear relationship between variables, dividing the current frame structure yuan, according to the mechanical characteristics of the different parts of hull grillage beam, force partition Liang Yuanhe shell element divided into two, and through the elastic section stress relationship, determine its elasticity coefficient, to establish the objective function of the optimization of hull grillage beam,and the function of the introduction of yield strength and stiffness constraints to improve the optimized hull seismic parameters, calculate the optimization variable values, to realize the optimization of the structure of hull grillage beam. The experimental data show that the transverse amplitude of the optimized structure is reduced by 23% and the longitudinal amplitude by 29%, which effectively reduces the vibration amplitude of the structure.
引文
[1]曾晓宏.基于改进遗传算法的企业组织结构优化设计[J].统计与决策,2016,2(8):173–176.
[2]刘波,林焰,吕振望,等.基于量子行为遗传算法的船体局部结构优化设计[J].船舶力学,2017,21(4):484–492.
[3]刘文进,王晓明,李新春.无线传感网络下的固定节点优化定位仿真[J].计算机仿真,2016,33(7):281–284.
[4]翟少兵,任德均.基于改进遗传算法的插齿机主运动机构优化设计[J].精密制造与自动化,2016(1):25–28.
[2]刘波,林焰,吕振望,等.基于量子行为遗传算法的船体局部结构优化设计[J].船舶力学,2017,21(4):484–492.
[3]刘文进,王晓明,李新春.无线传感网络下的固定节点优化定位仿真[J].计算机仿真,2016,33(7):281–284.
[4]翟少兵,任德均.基于改进遗传算法的插齿机主运动机构优化设计[J].精密制造与自动化,2016(1):25–28.