| 非线性约束在柴油机缸径与活塞行程优化设计中的应用 |
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| 引用本文： | 李国超,简弃非,刘海燕.非线性约束在柴油机缸径与活塞行程优化设计中的应用[J].华南理工大学学报(自然科学版),2005,33(11):107-110. |
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| 作者姓名： | 李国超 简弃非 刘海燕 |
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| 作者单位： | 华南理工大学,汽车工程学院,广东,广州,510640 |
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| 摘 要： | 柴油机的结构及工作参数均为非线性变化关系,活塞行程与气缸直径的比值（S/D）将直接影响柴油机的热负荷与散热面积.文中以最小散热面积为目标函数,建立了中、高速柴油机S/D为变量的优化设计数学模型;同时,在非线性约束条件下,利用序列二次规划法（SQP）在Matlab软件系统上进行优化计算.以国产135系列和4102Q系列柴油机为实例进行对比分析,结果与实际情况相一致.
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| 关 键 词： | 柴油机 缸径 活塞行程 优化设计 非线性约束 序列二次规划法 |
| 文章编号： | 1000-565X（2005）11-0107-04 |
| 收稿时间： | 2005-01-04 |
| 修稿时间： | 2005年1月4日 |
Application of Nonlinear Constraints to Optimized Design of Cylinder Diameter and Piston Stroke in Diesel Engines |
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| Li Guo-chao,Jian Qi-fei,Liu Hai-yan.Application of Nonlinear Constraints to Optimized Design of Cylinder Diameter and Piston Stroke in Diesel Engines[J].Journal of South China University of Technology(Natural Science Edition),2005,33(11):107-110. |
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| Authors: | Li Guo-chao Jian Qi-fei Liu Hai-yan |
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| Institution: | College of Automotive Engineering,South China Univ. of Tech. , Guangzhou 510640, Guangdong, China |
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| Abstract: | Since both the structure and the operating parameters of a d iesel engine change nonlinearly,the heat load and heat rad iation area are d irectly influenced by the ratio of piston stroke to cylinder d iameter(S /D).In this paper,an optim ized mathematicalmodel is established formoderate-speed and high-speed d iesel engines,with the m inimal heat rad iation area as the object function and theS /Dvalue as the variable.In the cond ition of nonli-near constraints,the proposed model is optim ized by Sequential Quadratic Programm ing(SQP) on Matlab system.An illustrated analysis is finally performed by using Series 135 and Series 4102Q d iesel engines as the objects,with the results accord ing well with those in actual situations. |
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| Keywords: | diesel engine cylinder diameter piston stroke optimized design nonlinear constraint Sequential Quadratic Programming |
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