汽车盘式制动器结构优化设计（本科毕业论文设计）.doc
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汽车盘式制动器结构优化设计（本科毕业论文设计）,摘要如何应用现代化的设计制造手段，设计生产出性能优异、成本合理的盘式制动器一直是各大汽车公司和专业生产厂家所关注的问题之一。随着参数化建模和优化设计技术的日益成熟，参数的优化设计方法在工程中的应用越来越广泛，也为盘式制动器的快速和精益设计提供了现代化的设计方法。然而，制动器设计模型的日益复杂化，使得应用传统优化方法进行...
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摘 要
如何应用现代化的设计制造手段，设计生产出性能优异、成本合理的盘式制动器一直是各大汽车公司和专业生产厂家所关注的问题之一。
随着参数化建模和优化设计技术的日益成熟，参数的优化设计方法在工程中的应用越来越广泛，也为盘式制动器的快速和精益设计提供了现代化的设计方法。然而，制动器设计模型的日益复杂化，使得应用传统优化方法进行参数优化设计出现了一定难度。随着计算机软硬件并行化的方向趋势，MATLAB优化工具箱在工程优化领域显现出一定优势，为制动器的参数优化设计提供了新的方法。
本设计是针对盘式制动器进行的优化设计。通过摩擦片的中心圆半径，摩擦片直径，活塞直径，制动盘厚度，油缸内的油压，制动盘的直径等数值对盘式制动器的影响来进行优化设计。通过以上设计变量对制动器的性能及结构安排的合理性，以及制动力矩、制动时间、制动盘的厚度为优化设计的目标，来限定约束条件。通过以上优化设计可以得出盘式制动器较合理的尺寸。
关键词：盘式制动器，优化设计，Matlab
ABSTRACT
How to design high quality and cheep disc brake based on modern design and manufacture technology is always the major problem concerned by all automobile factories and professional manufactories.
While designing new brakes,the internal manufactories generally adjust the parameters by experience base on the known drawing of brake.As to the recurrence of calculation and the complexity of brake model,the process of thedesign can be only repeated in limited times manually,it results the parameters are rough.With the development of Parametric Modeling and Structural Optimization,the Parametric Optimization has been used widely in the engineering,and provided modern method to design automobile brake rapidly and delicately.However,as the brake model become complex gradually,the traditionalalgorithms make the Parametric Optimization more and more hardly.Fortunately,the parallelization trend of computer hardware and software brings us the parallel algorithm,such as MATLAB,and it provide new selection of Parametric Optimization Algorithm used in brake design.
This design is a optimized plan for disc brake .It optimizes the design though the influence of the radius of center circle of friction sheet, the diameter of friction sheet, the diameter of piston, the deep of dish brake, the oil pressure in oil jar, the diameter of disc drake and so on .It limits the condition of restrain by the design variable influent the function of disc brake, reasonable of the plan of structure, and the time of limitation, the deep of disc brake as the aim of optimized plan. We can conclude the reasonable dimension of disc brake though the optimized design of the about.
Key words： Disc brake, Optimum design, Matlab
目 录
中文摘要 Ⅰ
ABSTRACT Ⅱ
1绪论 1
1.1 盘式制动器参数优化的意义 1
1.2 制动系概述 1
1.3 优化设计概述 2
1.3.1 优化设计与传统设计的比较 2
1.3.2 我国机械优化设计的历史与发展现状………………………………………………2
1.3.3 机械优化设计的一般过程……………………………………………………………3
2 盘式制动器简介 5
2.1 盘式制动器的工作原理……………………………………………………………………5.
2.2 盘式制动器的优越性………………………………………………………………………6
2.3盘式制动器应用现状……………………………………………………………………….6
2.4 盘式制动器的发展趋势……………………………………………………………………7
3 优化模型的建立…………………………………………………………………9
3.1 多目标优化方法简介………………………………………………………………………9
3.2模型假设……………………………………………………………………………………10
3.3设计变量的选取……………………………………………………………………………10
3.4 目标函数的选取与构造………………………………………………………………….11
3.4.1 制动力矩………………………………………………………………………………11
3.4.2制动时间……………………………………………………………………………….13
3.4.3 制动盘厚度……………………………………………………………………………14
3.5 约束条件的选取……………………………………………………………………………15
3.6 数学模型的建立………………………………………………………………………….16
4 MATLAB优化设计计算…………………………………………………………18
4.1 MATLAB及其优化工具箱简介………………………………………………………………18
4.2 非线性约束问题的求解………………………………………………………………… 19
4.2.1 MATLAB默认的非线性约束问题的形式………………………………………………19
4.2.2 fmincon函数的介绍…………………………………………………………………20
4.3 fmincon在盘式制动器优化问题的应用…………………………………………………21
4.4 优化前后比较、结果圆整及验算…………………………………………………………23
5 结论 25
致谢………………………………………………………………………26
参考文献 27
如何应用现代化的设计制造手段，设计生产出性能优异、成本合理的盘式制动器一直是各大汽车公司和专业生产厂家所关注的问题之一。
随着参数化建模和优化设计技术的日益成熟，参数的优化设计方法在工程中的应用越来越广泛，也为盘式制动器的快速和精益设计提供了现代化的设计方法。然而，制动器设计模型的日益复杂化，使得应用传统优化方法进行参数优化设计出现了一定难度。随着计算机软硬件并行化的方向趋势，MATLAB优化工具箱在工程优化领域显现出一定优势，为制动器的参数优化设计提供了新的方法。
本设计是针对盘式制动器进行的优化设计。通过摩擦片的中心圆半径，摩擦片直径，活塞直径，制动盘厚度，油缸内的油压，制动盘的直径等数值对盘式制动器的影响来进行优化设计。通过以上设计变量对制动器的性能及结构安排的合理性，以及制动力矩、制动时间、制动盘的厚度为优化设计的目标，来限定约束条件。通过以上优化设计可以得出盘式制动器较合理的尺寸。
关键词：盘式制动器，优化设计，Matlab
ABSTRACT
How to design high quality and cheep disc brake based on modern design and manufacture technology is always the major problem concerned by all automobile factories and professional manufactories.
While designing new brakes,the internal manufactories generally adjust the parameters by experience base on the known drawing of brake.As to the recurrence of calculation and the complexity of brake model,the process of thedesign can be only repeated in limited times manually,it results the parameters are rough.With the development of Parametric Modeling and Structural Optimization,the Parametric Optimization has been used widely in the engineering,and provided modern method to design automobile brake rapidly and delicately.However,as the brake model become complex gradually,the traditionalalgorithms make the Parametric Optimization more and more hardly.Fortunately,the parallelization trend of computer hardware and software brings us the parallel algorithm,such as MATLAB,and it provide new selection of Parametric Optimization Algorithm used in brake design.
This design is a optimized plan for disc brake .It optimizes the design though the influence of the radius of center circle of friction sheet, the diameter of friction sheet, the diameter of piston, the deep of dish brake, the oil pressure in oil jar, the diameter of disc drake and so on .It limits the condition of restrain by the design variable influent the function of disc brake, reasonable of the plan of structure, and the time of limitation, the deep of disc brake as the aim of optimized plan. We can conclude the reasonable dimension of disc brake though the optimized design of the about.
Key words： Disc brake, Optimum design, Matlab
目 录
中文摘要 Ⅰ
ABSTRACT Ⅱ
1绪论 1
1.1 盘式制动器参数优化的意义 1
1.2 制动系概述 1
1.3 优化设计概述 2
1.3.1 优化设计与传统设计的比较 2
1.3.2 我国机械优化设计的历史与发展现状………………………………………………2
1.3.3 机械优化设计的一般过程……………………………………………………………3
2 盘式制动器简介 5
2.1 盘式制动器的工作原理……………………………………………………………………5.
2.2 盘式制动器的优越性………………………………………………………………………6
2.3盘式制动器应用现状……………………………………………………………………….6
2.4 盘式制动器的发展趋势……………………………………………………………………7
3 优化模型的建立…………………………………………………………………9
3.1 多目标优化方法简介………………………………………………………………………9
3.2模型假设……………………………………………………………………………………10
3.3设计变量的选取……………………………………………………………………………10
3.4 目标函数的选取与构造………………………………………………………………….11
3.4.1 制动力矩………………………………………………………………………………11
3.4.2制动时间……………………………………………………………………………….13
3.4.3 制动盘厚度……………………………………………………………………………14
3.5 约束条件的选取……………………………………………………………………………15
3.6 数学模型的建立………………………………………………………………………….16
4 MATLAB优化设计计算…………………………………………………………18
4.1 MATLAB及其优化工具箱简介………………………………………………………………18
4.2 非线性约束问题的求解………………………………………………………………… 19
4.2.1 MATLAB默认的非线性约束问题的形式………………………………………………19
4.2.2 fmincon函数的介绍…………………………………………………………………20
4.3 fmincon在盘式制动器优化问题的应用…………………………………………………21
4.4 优化前后比较、结果圆整及验算…………………………………………………………23
5 结论 25
致谢………………………………………………………………………26
参考文献 27
