双质量飞轮-周向短弹簧型扭振减振器弹性特性设计原理及性能分析

分析了双质量飞轮-周向短弹簧型扭振减振器机构特点及其特殊的多级式非线性弹性特性的实现原理，建立了该减振器非线性弹性特性的解析表达式及各级扭转刚度的计算公式，阐述了该减振器结构设计的要点，对汽车怠速和行驶工况下该减振器的扭振控制性能进行了摸拟计算分析。     

200km/h六轴大功率客运电力机车故障态动力学性能分析

针对弹性架悬的2C0轴式200 km/h大功率客运电力机车,采用多刚体动力学软件SIMPACK建立了该机车动力学模型,对不同速度下机车各减振器故障态工况进行了动力学分析,并相应计算高干扰线路不平顺下机车最高运行速度.结果表明:只有当车轮磨耗接近限度,抗蛇形减振器失效以及前后转向架二系垂向减振器全部失效时,机车才不能达到...     

高速动车组半主动悬挂系统几种控制策略对比仿真分析

为了克服数学模型不能反映列车运行的真实情况,利用Adams/rail建立基于磁流变阻尼器的高速动车组8车模型,提出了基于一般模糊控制的量化因子、比例因子的参数自适应模糊控制策略。通过Matlab/Simulink环境中对高速动车组模型与被动控制和简单开关半主动控制、一般模糊控制、参数自适应模糊控制策略进行联合仿真分析。结果表明,一般模糊控制和参数自适应模糊控制比简单开关半主动控制控制品质好,参数自适应模糊控制控制效果最佳;半主动控制策略在降低车体横向加速度,脱轨系数和轮重减载率方面,明显优于被动控制。在提高列车运行平稳性,乘客乘坐舒适度和运行安全性方面显出优势。     

Semi-active suspension systems for railway vehicles using magnetorheological dampers. Part II: simulation and analysis

In this paper, the semi-active suspension system for railway vehicles based on the controlled (MR) fluid dampers is investigated, and compared with the passive on and passive off suspension systems. The lateral, yaw, and roll accelerations of the car body, trucks, and wheelsets of a full-scale railway vehicle integrated with four MR dampers in the secondary suspension systems, which are in the closed and open loops respectively, are simulated under the random and periodical track irregularities using the established governing equations of the railway vehicle and the modelled track irregularities in Part I of this paper. The simulation results indicate that (1) the semi-active controlled MR damper-based suspension system for railway vehicles is effective and beneficial as compared with the passive on and passive off modes, and (2) while the car body accelerations of the railway vehicle integrated with semi-active controlled MR dampers can be significantly reduced relative to the passive on and passive off ones, the accelerations of the trucks and wheelsets could be increased to some extent. However, the increase in the accelerations of the trucks and wheelsets is insignificant.     

阻尼器在接触网设计中的应用探讨

本文阐述了机械阻尼实现的种类及在接触网系统中的应用.由于承力索在承力索座内呈刚性连接,在机车高速运行时受电弓对接触网的冲击通过吊弦传递到承力索座处,尤其机车列数较为频繁时,一方面加速了承力索悬挂点处的累计疲劳,另一方面不利于接触网的弹性,削弱了接触网系统的寿命.应用阻尼耗能原理的阻尼器可有效地缓解对承力索定位点的冲击,并能提高接触网的弹性均匀度及机车受流的平稳性.     

Periods and energy dissipations of a novel TLD rectangular tank with angle-adjustable baffles

A novel tuned liquid damper (TLD) rectangular tank with two angle-adjustable baffles was presented. The numerical analysis was performed using the commercial code FLUENT. The standard kinetic energy and dissipation rate turbulent model was employed, which was solved using volume of fluid (VOF) method able to treat both the free surface motion and the viscous stresses over the rigid walls accurately. The relationship between the natural periods of water and the angles of its baffles was studied by numerical sim- ulating of a case, and the changes of energy dissipations were investigated. The natural periods and dampers of the novel TLD can be changed in a wide range by adjusting the baffles' angle, thus it is more effective in controlling the vibration of structures in a wide frequency range.     

厦漳跨海大桥北汊主桥斜拉索外置式阻尼器及其参数分析

简要介绍厦漳跨海大桥工程概况,阐述国内外对斜拉索振动及振动控制的研究.针对厦漳跨海大桥北汊主桥超长拉索柔性大、内阻尼低、固有频率分布广,极易在风、风雨和支承端位移等激励下发生振动的特点,从斜拉索振动频率分析、阻尼器安装高度确定、粘性体粘度选择、阻尼器箱体大小计算等几方面进行分析,最终选择粘性剪切型阻尼器作为斜拉索外置式阻尼器来保证斜拉索安全.     

基于基础知识进行的传动轴运动校核

运用CATIA三维数字模型"DMU Kinematics"模块,分别对悬架相关件进行约束。扶得悬架运动模型及传动半轴运动包络及传动轴运动轴运动滑移曲线,验证传动轴与周边件间隙是否符合设计要求、验证传动轴的轴向滑移量及传动轴万向节角度是否符合设计要求。     

可模拟车辆实际应用工况的油压减振器试验设备的开发

介绍了所开发的能够模拟车辆实际应用情况的油压减振器试验设备,重点阐述了减振器特性的自动识别功能.     

斜拉桥拉索MR模糊半主动控制研究

提出了使用MR阻尼器（Magnetorheological Damper）作为控制设备,模糊集为基础的半主动控制算法,并运用提出的算法对索-阻尼器系统进行了振动控制分析.本文方法的优势在于算法自身的鲁棒性、处理非线性问题的能力和不需要结构的精确数学模型,算法需要的输入变量少,可以解决实际工程中斜拉索的振动响应信息难以测量的困难.模糊算法的输出直接控制MR阻尼器的输入电压,与LQR-Clipped算法不同,MR阻尼器的输入电压可以是零与最大值之间的任意值.本文以实际斜拉桥拉索为例,分析了拉索在谐荷载及风荷载作用下的系统振动控制效果,数值结果表明,本文提出的模糊半主动控制算法比MR被动控制效果好,且可以减小需要的控制力,使MR阻尼器的功能得到了更好的发挥.