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考虑不同学科间的相互影响及耦合作用对受电弓设计优化的影响,分析了高速受电弓不同性能的设计要求,采用多学科设计优化思想建立了受电弓多学科设计的系统级优化模型及运动学、静力学、动力学和控制学的子系统优化模型;根据不同学科设计参数的耦合关系,采用协同优化方法,获取高速受电弓整体设计优化结果;建立受电弓的三维模型,采用有限元软件ANSYS验证了受电弓优化结果的有效性。结果表明:受电弓多学科协同设计优化不仅满足系统级和各个学科的设计要求,还获得高速受电弓系统的整体最优解或满意解,提高了受电弓的工作性能,降低了弓网接触力的波动,改善了弓网受流质量。 相似文献
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高速受电弓整体结构特性分析 总被引:1,自引:0,他引:1
受电弓整体结构分析对于改进受电弓的设计,提高受电弓的性能,具有重要意义。为保证良好的受流质量,新型高速受电弓大量采用轻型合金材料制作,这可能导致机械强度和刚度的不足。在满足强度与刚度的前提下,最大限度减小受电弓归算质量,以改善弓—网动态性能是受电弓设计的关键问题。文中结合受电弓的开发过程,建立三维仿真模型,利用有限元计算软件Ansys,进行受电弓的强度和刚度校核以及动力特性分析。研究受电弓动力特性的目的在于优化其结构,以控制其模态频率与模态振型,对受电弓的设计具有指导意义。通过对受电弓有限元分析,进行虚拟设计,首次进行高速受电弓的整体结构特性分析。 相似文献
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高速列车在运行过程中速度、加速度的变化以及其他的一些诱因,会使受电弓在服役过程中产生共振,可能导致受流质量的降低和弓网离线等严重问题。对受电弓进行模态试验,获得其固有频率和模态振型,对受电弓的安装以及后续的优化设计有着重要的指导作用。针对某型高速受电弓,通过DHDAS软件平台,分别对长期服役后有、无裂纹的两个受电弓上框架进行模态试验,获得其固有频率和模态振型,试验结果表明:裂纹的产生对上框架的振动特性有一定的影响。 相似文献
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针对高速列车受电弓区噪声相对较高的问题,提出受电弓减振安装方案,并在模拟实车环境下验证了其降噪效果和可靠性。首先,在某高速列车上进行了线路运行条件下受电弓区振动和噪声测试,分析发现结构振动是该区域噪声传播的重要方式,设计了一种独特的锥形椭圆结构减振座,用于受电弓弹性安装;其次,搭建了模拟现车试验台,验证减振座的降噪效果;最后,进行了总计252万次的疲劳试验以验证减振座的可靠性。试验结果表明,该减振座能够有效减小受电弓振动对车体的激励,从而降低该区域的噪声,降噪效果约为4dB(A),其疲劳可靠性能够满足线路运行要求。 相似文献
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Jin-Hee Lee Young-Guk Kim Jin-Sung Paik Tae-Won Park 《Journal of Mechanical Science and Technology》2012,26(10):3253-3260
The global trend in the railway industry is the effort to increase the maximum speed and stability of a train. For an electric railway vehicle to meet this driving performance, stable electric power should be supplied by a catenary system. Various factors affect the current collection performance, most important of which is the dynamic characteristics of a pantograph. In this paper, the sensitivity analysis and design optimization of a pantograph for a high-speed train were conducted using a finite element method. The dynamic catenarypantograph interaction was analyzed by using the commercial finite element analysis software, SAMCEF. The pantograph was modeled as a three degrees of freedom mass-spring-damper system, and the pre-sag of the contact and messenger wire due to gravity was implemented. The span data of a high-speed line was applied in the analysis model. And the dynamic characteristics of the pantograph model were obtained by a performance test. The reliability of the simulation model was verified by comparing the analysis contact force results with the test data. By simulation, the mean contact force and its standard deviation etc. were evaluated, and then sensitivity of the pantograph was analyzed. Based on the sensitivity analysis results, the specification of the pantograph was optimized. In the optimization process, response surface analysis and differential evolutionary algorithm were applied to define the regressive function and to determine the optimum values for stable current collection performance. Finally, the improvement of the current collection performance was verified by comparing the optimum specification results with the original specification. 相似文献
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J. Zhang G. F. Ding Y. S. Zhou J. Jiang X. Ying S. F. Qin 《The International Journal of Advanced Manufacturing Technology》2014,73(1-4):251-265
As a complex mechatronic system, the running stability, safety, and comfort of high-speed train are affected by many design variables. It is of great difficulty to identify a set of effective design parameters to optimize its running performance. The current simulation systems like the SIMPACK can simulate the running dynamics, but cannot be used effectively for optimal design of the train and rail system because there are too many design variables being supposed to be dealt with. Therefore, there is a need to make a software solution from simulation analysis to optimal design so that the computer-aided design (CAD) and engineering (CAE) can be integrated into an integral design process. This paper presents a new method to identify the key design variables against the running performance indicators based on the sensitivity analysis, which in turn bases itself on simulation-oriented surrogate models. In this way, the optimal design of a high-speed train can be successfully conducted because (1) the surrogate model can reduce the simulation time greatly and (2) the design variable space with the key variables will be reduced significantly. The research shows that this method is of practical significance for speeding up the design of high-speed train or similar complex mechatronic systems. 相似文献
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根据空间圆柱凸轮的结构特征、使用和工作特性等要求,提出了利用光滑型、保形性能好的三次参数样条曲线拟合测量数据的圆柱凸轮曲线反求设计方法,介绍了圆柱凸轮齿轮部分齿形测量的基本内容,研究了齿轮结构参数和齿轮精度反求分析的基本方法,反求设计后的圆柱凸轮类产品已实现批量化生产. 相似文献
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针对电控喷油器动态响应性能需要改善的问题,运用Ansoft Maxwell电磁场仿真软件建立了喷油器的计算模型,对包括轭铁厚度、铁芯外径、衔铁长度、工作气隙、线圈匝数和线圈电阻在内的关键结构参数对其动态响应性能的影响规律进行了研究,在此基础上以各关键结构参数作为设计变量,开启滞后时间和落座滞后时间作为目标函数建立了相应的优化模型,通过遗传算法对这些结构参数进行了匹配优化,并通过仿真和试验的方法对该优化方案的有效性进行了验证。研究结果表明,经过优化后电控喷油器的开启滞后时间和落座滞后时间分别缩短了33.1%和37.1%,其动态响应性能得到了提高。 相似文献
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飞机翼面结构形状的控制设计是提高飞机性能的关键技术。本文以压电纤维复合薄膜(Microfiber Composite,MFC)为驱动器,研究了协同优化设计MFC驱动器结构参数与控制电压以使飞机翼面结构具有理想形状的方法。以MFC的电极宽度、电极指间距、MFC厚度、压电陶瓷体积分数等驱动器结构参数以及控制电压为设计变量,以控制偏差最小为优化目标,以驱动器的击穿电压为约束,建立了驱动器结构参数与控制电压协同优化设计的模型;通过分析MFC驱动器结构参数对驱动性能的影响,给出了最优的驱动器结构参数;针对类似机翼翼面形状的平板扭转型面,给出了驱动器结构参数与控制电压协同的最优控制设计。设计结果表明:对于扭转变形,多个不同控制电压控制的型面均方差是相同控制电压控制均方差的45%,分析结果验证了本文所建立的协同优化设计方法的有效性。 相似文献
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斜齿齿轮泵在保持直齿齿轮泵优点的基础上降低了压力脉动和躁声,但流量脉动性能没有得到明显改善。双斜齿轮在满足一定参数关系和装配关系的条件下,能有效改善瞬间排量和流量脉动,更具优良性能。基于VC软件,构建稳健优化设计系统(RODS),通过RODS设计平台实现双斜齿轮泵结构参数的优化设计,分析建立两个约束条件,分析可控因素,建立优化目标,分析约束条件,并优化求解,使双斜齿轮齿泵的流量脉动最小的同时,满足其它限制条件。 相似文献