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A nonlinear optimization tool to simulate a marine propulsion system for ship conceptual design

机译：用于模拟船舶概念设计海洋推进系统的非线性优化工具

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摘要

An optimization tool is developed to simulate the performance of a marine propulsion system of a fishing trawler for ship conceptual design. It consists of two modules implemented in Matlab. The first optimization module simulates the performance of a high speed turbocharged four-stroke marine diesel engine along the engine load diagram. It couples 1D engine simulation tool and a nonlinear optimizer to minimize the BSFC of the marine engine and to verify the limitations of emissions defined by international organizations, by optimizing turbocharger and injection parameters. The second module assists in the selection of a suitable fixed pitch propeller from Wageningen B-series at the ship design speed at engine operating point with minimum fuel consumption and by verifying the propeller cavitation, strength and noise issues, instead of only maximizing the propeller efficiency or minimizing the BSFC as considered in previous researches.Then, the objective of the propeller optimization module is changed to compute the propeller performance by (1) maximizing the propeller efficiency (2) minimizing the BSFC, for the purpose of comparison with the current study. The current case shows a significant reduction in the amount of fuel consumed by around 30% in comparison with the other two cases.
机译：开发了一种优化工具来模拟渔船船舶概念设计的船舶推进系统的性能。它由MATLAB中实现的两个模块组成。第一优化模块沿发动机负载图模拟高速涡轮增压的四冲程船用柴油发动机的性能。它耦合1D发动机仿真工具和非线性优化器，以最大限度地减少海洋发动机的BSFC，并通过优化涡轮增压器和注射参数来验证国际组织定义的排放限制。第二个模块有助于在发动机操作点处选择从Wageningen B系列的合适的固定间距螺旋桨，​​以最小的燃料消耗，并通过验证螺旋桨空化，强度和噪声问题，而不是仅最大化螺旋桨效率或者最小化在以前的研究中考虑的BSFC。该改变螺旋桨优化模块的目的被改变为计算推进器性能（1）以最大限度地提高BSFC的推进器效率（2），以便与当前的研究进行比较。与其他两种情况相比，当前情况显示燃料量大约30％的显着降低。

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