基于参数化CAD模型的船型阻力/耐波性一体化设计

Integrated Ship Resistence/Seakeeping Optimization Based on Parametric CAD Model

在舰船概念设计阶段,往往需要快速生成阻力和耐波性能兼优的船型。采用基于母型船的船型融合生成方法,实现了参数化船型自动生成。在此基础上,采用iSight优化平台,将参数化船型生成技术与阻力、耐波性计算模型集成,运用多学科设计优化技术实现了船型阻力/耐波性性能一体化设计。优化方法采用多目标遗传算法以获取Pareto前沿。以一艘46 000 DWT油船的型线优化为算例对这个过程进行了具体说明,试验结果表明总阻力降低了3%,验证了这种方法的可行性。

The hull forms of ship both with optimal resistance and seakeeping performances are required to create quickly in the conceptual design phase.Parametric ship hulls were achieved automatically with a blending method according to the baseline ship design.Based on that,the resistance and seakeeping performance integrated optimization was implemented with multidisciplinary design optimization method,combining parametric ship hull blending method and the resistance and seakeeping performance procedures through iSight optimization software.A multi-criterion,population-based evolutionary algorithm optimization process was used to provide a more thorough representation of the numerically approximated Pareto front.The resistance and seakeeping integrated optimization of 46 000 DWT oil tanker was presented as an example to illustrate the process.Model test results show that total resistance reduction is up to 3%.The feasibility of this integrated optimization method was also validated.