齿轮减速器的最优化设计

在齿轮减速器优化设计目标函数建立、设计变量选取和约束条件确定的基础上,建立其优化设计数学模型,利用MATLAB的优化工具箱对齿轮减速器进行优化设计,并通过实例与常规设计结果进行了分析。优化结果表明采用MATLAB算法求解优化设计问题,算法有效可靠且优于常规设计。     

基于MATLAB的齿轮减速器优化设计

以减速器中齿轮的齿数、模数、齿宽及轴的直径等作为设计变量，以减速器的体积为目标函数，利用MATLAB的优化工具箱，对减速器进行优化设计，简化了复杂的编程，提高了设计效率和质量。     

齿轮减速器可靠性优化的MATLAB实现

以直齿圆柱齿轮的体积为优化的目标函数，建立了单级斜齿轮减速器的可靠性优化设计数学模型，并结合实例介绍了MATLAB优化工具箱（Optimization Toolbox）在优化计算中的应用。利用MATLAB优化工具箱来求解优化问题，程序简单，算法可靠，大大提高了设计效率。     

二级圆柱齿轮减速器优化设计及其MATLAB实现

通过设计变量的选取、目标函数和约束条件的确定,建立了二级斜齿圆柱齿轮减速器的优化设计数学模型,最后借助MATLAB的优化工具箱进行了寻优计算。结果显示,采用此方法不仅算法可靠有效,而且编写程序简单,设计效率得以提高。     

基于MATLAB的牙轮钻机回转减速器的模糊优化设计

介绍了牙轮钻机回转减速器齿轮传动单目标优化问题数学模型的建立,以中心距最小为目标,以齿轮的强度、结构要求和减速器的性能要求等为约束条件,采用模糊设计理论和MATLAB优化函数程序相结合进行优化,为回转减速器和钻架的合理设计提供了理论依据。     

锥齿轮减速器的遗传算法优化设计

确定进行齿轮减速器的优化设计目标函数与设计变量,建立约束函数得出相应的约束方程,采用遗传算法进行优化设计,最后,借助MATLAB的优化工具箱进行优化计算,计算结果表明,优化设计的效果显著。     

MATLAB遗传算法对轮边减速器的优化设计

本文以轮边减速器的体积最小作为优化目标函数,根据轮边减速器的结构特点确定设计变量和约束条件,并建立数学模型;采用MATLAB优化工具箱,用遗传算法对其结构进行优化计算,以某一型轮边减速器为例。结果表明:此方法有很好的优化效果,大大减少了轮边减速器的外形尺寸;此方法的可行性也对工程机械领域的结构优化有了一定的理论依据。     

基于Matlab的圆柱齿轮减速器最小中心距优化设计

圆柱齿轮减速器作为一种机械传动装置,其主要作用是降低输入轴的转速并增大机械结构间的转矩,在建筑业、运输业、采矿业等领域都有所运用。[1]为了降低制造成本,提高研发人员的效率,需要对圆柱齿轮减速器中心距进行适宜的优化设计。寻找与优化二级圆柱齿轮减速器最小中心距相关的约束条件并建立对应的数学模型,利用MATLAB中的fmincon函数对数学模型进行优化求解,得到圆柱齿轮减速器的最小中心距。圆柱齿轮减速器最小中心距优化得到的结果符合设计要求。     

基于MATLAB的多级齿轮传动多目标可靠性优化设计研究

机械可靠性优化设计是以机械产品的可靠度作为目标函数或约束条件,运用优化设计方法获得最佳设计方案的现代设计方法。本研究以三级斜齿圆柱齿轮减速器可靠性优化设计为例,以减速器体积最小、传动平稳可靠为目标函数,将强度设计可靠性纳入约束条件,建立多级齿轮传动多目标可靠性优化设计数学模型,利用MATLAB优化工具箱进行可靠性优化设计。     

基于MATLAB优化工具箱的机械优化设计

以齿轮减速器为例,介绍了MATLAB优化工具箱在机械优化设计中的应用,根据减速器的设计要求和特点,建立了减速器的优化设计数学模型,以减速器体积最小进行了优化。利用MATLAB优化工具箱来求解机械优化问题,具有编程简单、可靠性好、效率高的特点。     

某型号飞机起落架支柱减振筒内壁腐蚀原因分析

飞机起落架减振支柱在飞机起落和滑跑时,吸收撞击能量,对飞机安全起降的意义重大.减振筒是减振支柱中的重要部件,本文从工艺流程、理化分析、外场使用和腐蚀机理分析等方面,对减振支柱减振筒内壁的腐蚀原因及危害进行了综合分析,并提出了相应措施.     

磨粉机快辊轴承座加工工艺设计

设计了磨粉机快辊轴承座的加工工艺和具体的工装夹具.利用卧式加工中心加工磨粉机快辊轴承座,辅以能够高效快速夹紧的夹具,既可以保证加工精度,又能够提高加工效率.     

Natural frequencies of vibration of a class of solids composed of layers of isotropic materials

In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape.     

叶切面最大厚度数值计算与应用

以叶切面最大厚度的数值计算方法为基础,探讨叶切面最大厚度计算的计算机实现,介绍叶切面厚度数值计算法的应用实例.     

两种仪表功能合理性评述

本文以某些积算和双笔记录仪产品为例说明由于仪表功能设计的不合理或选型不当，影响了仪表的正常使用，制造厂和用户应关注这类问题。     

膨胀套导向机构的设计

通过分析膨胀套在实际使用产生滑移受阻现象、卡死现象原因的实质,并在分析产生问题原因的基础上提出了改进措施即：增加导向机构。     

Effect of Impregnation of Iodine Complex on Friction of Anodic Oxide of Aluminum

Polyvinyl pyrrolidone-Iodine complex (PVP-I) molecules were impregnated into the anodic oxide of an aluminum disk specimen. It was rubbed against a silicon nitride ball specimen using a ball-on-disk type friction test rig. Over the limited range of parameters studied (load: 0.2-1.0 N, sliding velocity: 0.6 mm/s, and sliding distance: 1-7 m), the coefficient of friction decreased to a value as low as 0.01 from values of 0.3 to 0.7 for the anodic oxide surface. Single-crystal iodine rubbed against silicon nitride showed a coefficient of friction of 0.1. The low coefficient of friction is attributed to the thin PVP-I film on the relatively hard anodic oxide. The mechanism of coefficient of friction reduction is the same as that of a thin soft film on a hard substrate.     

双丝杠驱动机构同步分析

介绍了双丝杠驱动机构工作原理,论述了双丝杠运动产生不同步的原因以及如何判定与解决同步问题。     

我校工业设计教育改革初探

针对目前市场对工业设计人才的需求,本文论述了我校在工业设计教育方面的改革措施,着重介绍了我校工业设计教育在软件和硬件方面所进行的一系列的改革。     

Modeling of coefficient of contraction of differential pressure flowmeters

The article provides a solution to the problem of contraction process modeling when measuring the flow of fluids and gases using differential pressure flowmeters. The article shows the feasibility of obtaining the coefficient of contraction from the mathematical model of the reduced/contracted flow of fluids or gases. An analytical expression is obtained for the coefficient of contraction, which agrees well with the results of the experiment. Analysis of this expression is performed and dependencies on the geometrical parameters of the pipeline and orifice plate are obtained.