空间多级齿轮传动系统设计的自动设计系统研究

为了解决空间多级齿轮传动系统方案求解和优化缺乏统一支撑体系、建模困难的问题,提出了空间多级齿轮传动系统设计的自动化系统架构,结合Visual Basics6.0研制了空间多级齿轮传动系统的方案设计、优化设计集成建模的自动设计软件系统,设计师仅需输入少许设计需求,系统能自动完成方案设计;并根据确定方案自动完成优化建模和求解,真正实现了空间多级齿轮传动系统设计的自动化。实例结果验证了系统的可行性和可靠性,是一款建模过程简单,设计质量和效率高的设计工具。     

多级齿轮传动系统的空间最佳布局方案设计

分析多级圆柱齿轮传动系统的设计过程,提出分步优化设计方法,建立了相应的分步优化数学模型,基于MATLAB编制了设计程序,获得了多级齿轮传动系统主要设计参数的最优值和各个传动零件的空间最佳布局方案,并实现了方案的可视化。实例分析表明所提方法是有效的和可靠的,对提高设计效率和设计质量帮助明显,是解决该类工程问题的便捷工具。     

齿轮传动系统的动态性能分析和优化设计

为了分析多级齿轮传动系统的动态性能,构建了齿轮传动系统仿真模型,通过仿真,分析多级齿轮传动系统的主要物理参数对于齿轮传动系统动态性能的影响规律。并基于仿真得到的分析数据据和相应的实验测试数据,提出了应用谐波平衡法的多级齿轮传动系统优化设计方法,并获得最优设计参数。     

平行轴齿轮传动系统的紧凑布置设计

平行轴齿轮传动系统的占用空间主要取决于轴横截面上的占用面积，减小轴横截面占用面积是其紧凑布置设计的重要组成部分，而其中的关键是如何实现啮合齿轮系凸包面积的计算方法。研究了啮合齿轮系凸包面积的计算模型，配合啮合和干涉约束的定义，给出了优化模型和算法实现。结果表明可以有效地缩小传动系统的占用空间，且对此类布置设计具有一定的通用性。     

转台齿轮传动系统的误差建模及其精度分配研究

针对齿轮传动系统误差建模分析和精度分配这一问题,以新型转台传动系统为例,提出了一种具备良好鲁棒性、经济性及实用性的新传动系统优化设计方案。首先,建立了从单个齿轮到一对齿轮再到齿轮传动系统的传动误差分步计算体系,以概率统计法为基础创建了传动误差数学模型,对其传动误差进行了计算;然后,针对传统遗传算法进行多目标拓扑优化,创建了具备良好经济性和工程意义的齿轮精度分配方案,对齿轮精度进行了分配;最后,将两者进行有机整合,得到了新的传动系统优化设计方案,并设计实验对其正确性进行了验证。研究结果表明:采用新传动系统优化设计方案进行优化后,转台传动系统在满足设计要求的前提下,相关的齿轮精度等级得以降低,转台成本下降;同时,经过实验验证,采用该传动误差计算模型能够使齿轮传动系统的设计周期缩短7%,并降低对经验的依赖程度。     

风机齿轮传动系统整体方案的粒子群算法两层优化设计方法

提出了一种基于粒子群两层优化的风机齿轮传动系统整体方案设计方法,在充分考虑风机齿轮传动系统内在机理的前提下,以系统整体的可靠性为设计目标,通过两层优化相结合的方式,使用改进的粒子群算法寻找整个优化空间中的最优设计方案。该设计方法能够有效避免齿轮传动系统中常出现的短板效应,提高风机齿轮传动系统的可靠性。     

双速卷扬机减速器多流传动系统的运动学分析与网络化设计

结合现代设计技术,探讨了基于Internet网络化的双速卷扬机传动系统设计方法,讨论了双速卷扬机齿轮传动多级优化设计,双速卷扬机设计系统的软件开发问题,为研制开发传动系统提供了现代设计的理论和可靠的技术方法.     

NGW型行星齿轮系优化及软件开发

以体积最小为优化目标,建立了NGW型行星齿轮传动系统的优化设计数学模型.以MATLAB软件为平台,开发了相应的优化设计计算软件,并结合算例给出了优化计算结果.此研究工作能为NGW型行星齿轮传动系统的优化设计提供指导.     

提高多级齿轮传动系统动态性能的优化设计

提出了提高多级斜齿圆柱齿轮传动系统动态性能优化设计方法。重点论述了系统动力学模型的建立,运动微分方程的求解方法和优化数学模型。由于系统动力学模型考虑了多对齿轮的转动惯量、时变啮合刚度、误差、阻尼以及轴的转动惯量和刚度,因此,所建立的微分方程式是多自由度时变方程组,对此,本文采用模态分析法与状态空间法相结合的方法进行求解。在此基础上,建立了提高齿轮传动系统动态性能优化设计的数学模型。实例计算证明,动态性能优化设计后的齿轮传动系统,其动态性能有明显的改善。     

基于改进粒子群算法的齿轮传动优化设计研究

针对齿轮传动系统多目标优化设计问题,选取了齿轮传动系统的体积和重合度作为优化目标函数,建立了以可靠性约束、齿数约束、模数约束等作为约束条件的齿轮传动系统多目标优化数学模型。将收缩因子和线性递减惯性权重引入到基本粒子群算法中,得到了带收缩因子的线性递减惯性权重粒子群寻优算法;利用该算法具有收敛速度快和搜索能力强的特点,对二级斜齿圆柱齿轮传动系统的优化数学模型进行了求解,最终得到了齿轮的关键参数(齿数、模数、螺旋角)的最优解。研究结果表明:在齿轮传动优化设计中采用带收缩因子的线性递减惯性权重粒子群寻优算法,可以使二级斜齿圆柱齿轮传动系统的体积减少39.8%,重合度提高7.3%,降低成本,提高齿轮传动的稳定性;该结果可为齿轮传动系统的优化设计提供参考依据。     

Multiobjective optimization of three-stage spur gear reduction units using interactive physical programming

The preliminary design optimization of multi-stage spur gear reduction units has been a subject of considerable interest, since many high-performance power transmission applications (e.g., automotive and aerospace) require high-performance gear reduction units. There are multiple objectives in the optimal design of multi-stage spur gear reduction unit, such as minimizing the volume and maximizing the surface fatigue life. It is reasonable to formulate the design of spur gear reduction unit as a multi-objective optimization problem, and find an appropriate approach to solve it. In this paper an interactive physical programming approach is developed to place physical programming into an interactive framework in a natural way. Class functions, which are used to represent the designer’s preferences on design objectives, are fixed during the interactive physical programming procedure. After a Pareto solution is generated, a preference offset is added into the class function of each objective based on whether the designer would like to improve this objective or sacrifice the objective so as to improve other objectives. The preference offsets are adjusted during the interactive physical programming procedure, and an optimal solution that satisfies the designer’s preferences is supposed to be obtained by the end of the procedure. An optimization problem of three-stage spur gear reduction unit is given to illustrate the effectiveness of the proposed approach.     

多级平行轴齿轮传动系统方案设计平台

在汽车、航空、船舶等动力传动系统设计中,多级平行轴齿轮传动方案应用广泛,其设计处于整个传动系统研发周期的最前端,更是决定传动系统性能的关键环节。因此,开发智能化的多级平行轴齿轮传动方案设计软件对于缩短设计周期、提高设计质量等都具有重要的意义。在C#.Net 2005环境下,使用MindFusion程序组件,调用Matlab和Pro/E程序,开发集方案图绘制、参数计算、三维输出于一体的多级平行轴齿轮传动方案设计平台。该设计平台数据计算高效、界面友好,是传动方案设计的有力工具。     

Optimum weight design of functionally graded material gears

Traditional gear weight optimization methods consider gear tooth number, module, face width or other dimension parameters of gear as design variables. However, due to the complicated form and geometric features peculiar to the gear, there will be large amounts of design parameters in gear design, and the influences of gear parameters changing on gear trains, transmission system and the whole equipment have to be taken into account, which increases the complexity of optimization problem. This paper puts forward to apply functionally graded materials(FGMs) to gears and then conduct the optimization. According to the force situation of gears, the material distribution form of FGM gears is determined. Then based on the performance parameters analysis of FGMs and the practical working demands for gears, a multi-objective optimization model is formed. Finally by using the goal driven optimization(GDO) method, the optimal material distribution is achieved, which makes gear weight and the maximum deformation be minimum and the maximum bending stress do not exceed the allowable stress. As an example, the applying of FGM to automotive transmission gear is conducted to illustrate the optimization design process and the result shows that under the condition of keeping the normal working performance of gear, the method achieves in greatly reducing the gear weight. This research proposes a FGM gears design method that is able to largely reduce the weight of gears by optimizing the microscopic material parameters instead of changing the macroscopic dimension parameters of gears, which reduces the complexity of gear weight optimization problem.     

A study on load-sharing structure of multi-stage planetary transmission system

Unequal load distribution is a crucial factor in decreasing bearing capacity and stability of the planetary transmission system. In this paper, a dynamical model of two-stage helical planetary gear transmission system is established based on lumped-parameter method and Lagrange general function. Nonlinearity of gear tooth backlash and error is taken into account. Four load-sharing structures are proposed to study the load-sharing performance. A method to calculate dynamic sensitivity of load-sharing coefficient to errors is presented that can provide a reference to component precision determination in order to make planetary system have a better load distribution. Finally, a numerical method of load-sharing performance is validated by a test. These results provide fundamental basis for multi-stage planetary gear transmission system design.     

基于动力学的风电增速箱多级齿轮传动系统可靠性评估

针对风力发电机齿轮传动系统在变风速工况下失效率高的问题,在模拟真实风速的基础上,建立了考虑外部随机风载及内部轮齿时变啮合刚度、轴承时变刚度、综合传递误差等激励因素的风力发电机齿轮传动系统齿轮-轴承耦合动力学模型,通过对动力学模型进行仿真计算,得到了各齿轮副的动态啮合力和各支承轴承的动态接触力,并求得齿轮的使用系数、齿轮和轴承的载荷系数。在此基础上,建立了基于动力学的风电齿轮传动系统可靠性评估模型,并求得了各零件及传动系统的可靠度,较全面地评价了随机风载作用下风力发电机齿轮传动系统的可靠性,为风力发电机齿轮传动系统可靠性设计和动态优化奠定了基础。     

基于精确传动比的多级平行轴齿轮减速器齿数设计

以精确保证多级平行轴齿轮减速器的总传动比为设计目标,研究了在给定中心距、总传动比条件下,齿轮各参数之间的数学关系;建立了多级减速器齿轮齿数选择的数学模型;开发了多级齿轮减速器的齿数计算程序,使设计者可以快速确定多级平行轴齿轮减速器各级齿轮的齿数组合,在合理的模数、螺旋角、变位系数取值范围内,保证各级中心距,并精确保证总传动比。     

销齿传动的优化设计

对于普遍使用的渐开线圆柱齿轮传动的计算机辅助优化设计已多有研究,但对于应用日渐广泛的销齿传动的优化设计报道甚少。本文对销齿传动的计算机辅助优化设计作了初步探讨,试图对从事齿轮传动设计的同仁能有所益处。     

Summary and outlook on gear system's kinetic study

Gear system is widely used and often act an important role in essential equipment. Aiming at the problem that its vibration problem at high rotation speed, interior complex structure and various nonlinear factors bring huge diificulty to its kinetic analysis and design, to summarize its kinetic study is of theoretical significance. Based on the analysis and summary on gear transmiision's dynamics research achievements, the basic framework of gear system's dynamics theory was described, the results indicate that the content includes system input, system model and system output. According to the research methods of nonlinear systems, the study on gear system's nonlinear dynamics and the research status of whole multi-stage gear system during past ten years were summarized, especially the typical automotive transmission, and the focus of future research was shown. Finally, the possible research focus and directions in dynamic behavior, vibration and noise, fault diagnosis and reliability of the transmiision were put forward. [ABSTRACT FROM AUTHOR]     

齿轮传动系统动态优化设计研究

以齿轮箱体振动加速度最小为目标函数,以动应力和动位移为约束条件对齿轮传动系统进行动态优化设计,降低齿轮传动系统的振动幅值和变形,并分析齿轮传动系统动态优化设计结果。     

高速重载齿轮传动系统动态响应优化设计

以振动加速度最小为目标函数,以动应力和动位移为约束条件,对高速重栽齿轮传动系统进行动力响应优化设计,降低了齿轮传动系统的振动幅值和静态变形,并分析了高速重栽齿轮传动系统响应优化设计结果。