磁流变阻尼器结构参数多目标优化设计和实践-仪器仪表工程专业论文.docx

重庆大 重庆大学硕士学位论文 中文摘要 PAGE PAGE III the electromagnetic loop can thus be calculated. ④ Aiming at the adjustable damping force and the response time, the multi-objective optimization process of the MR fluid damper was introduced. The type solution obtained from the mixing method and the optimized result obtained from the weight coefficient method were compared, the parameter which suits engineering application better were chose to be processed to verify the rationality of optimization. ⑤The indicator diagram under different field currents was obtained by testing the indicating character of the MR fluid damper. By adding series resistance, the electromagnetic response time was measured. Compared with the theoretical calculating value of the damping force and electromagnetic, the experimental value of the damping force slightly deviated. And the reason of deviation was analyzed. At last, all the procedures from this article was concluded, also, the deficiencies during researching and the further research direction was pointed out. Key words: magnetorheological fluid damper, Chain-model, Genetic Algorithm, Multi-objective optimization 重庆大 重庆大学硕士学位论文 目 录 PAGE PAGE IV 目 录 中文摘要 I 英文摘要II 1 绪 论 1 1.1 课题背景 1 1.2 磁流变液研究现状1 1.2.1 磁流变液概述 1 1.2.2 磁流变液宏观本构模型 2 1.2.3 基于微观结构的分析模型 5 1.3 磁流变阻尼器研究现状7 1.3.1 磁流变阻尼器概述 7 1.3.2 磁流变阻尼器结构方面研究现状 8 1.3.3 磁流变阻尼器优化方面研究现状 8 1.4 课题研究意义9 1.5 本论文将开展的工作10 2 基于偶极子的磁流变液微观分析12 2.1 引言 12 2.2 偶极子理论12 2.3 磁偶极子间的相互作用力14 2.4 微观模型 15 2.5 影响因素分析19 2.6 本章小结 21 3 磁流变阻尼器设计 22 3.1 引言 22 3.2 磁流变阻尼器的工作模式22 3.3 磁流变阻尼器流变学分析23 3.3.1 牛顿流体模型分析 24 3.3.2 双粘度模型分析 26 3.4 磁流变阻尼器磁路设计28 3.4.1 磁路设计准则 29 3.4.2 电磁磁路设计 29 3.4.3 磁路电磁响应时间 31 3.5 本章小结 32 PAGE PAGE VI 4 浮动活塞式磁流变阻尼器的多目标优化设计33 4.1 引言 33 4.2 多目标遗传优化理论概述33 4.2.1 遗传算法 33 4.2.2 多目标优化 33 MATLAB 概述 34 4.3 多目标优化设计35 4.3.1 目标函数 35 4.3.2 设计变量 35 4.3.3 约束条件 37 4.3.4 优化流程 37 4.4 优化结果分析37 4.4.1 混合法分析 37 4.4.2 权重系数变换法分