1.In order to reduce the "wind vibration" and steel dosage,this paper chooses the Ball Vibration Absorber(BVA) to be mounted on the top of the structure to reduce the response of displacement after comparing various kinds of control equipments.
为了有效抑制“风振”、降低用钢量,本文在比较多种被动控制装置的基础上提出在结构顶部安装钢球动力减振器(Ball Vibration Absorber)来减小位移反应。
2.Suppose we view a locomotive as a whole system,the space configuration of each locomotive is described by a 17-freedomed in horizon surface.Taking into account the elastic supporting of first and second system,hanging equipment and resistance characteristic,a space vibration model of four-axis bogie vehicle crawl vibration is presented.The characteristic root of the model is calculated.The stability of vehicle crawl vibration and critical velocity is researched.The result is that increasing vertical and horizontal stiffness and resistance of every wheel can decrease crawl vibration of bogies and carriages.And the optimization parameters are given.The improvements lie in using electromagnetic or crawl vibration absorber to replace hydraulic pressure vibration one and using awl spring to replace old pillar one.
将机车作为一个整体系统，用17个自由度描述机车在一般情况下横向平面的空间位置.考虑到一系、二系悬挂装置的弹性支承以及减振器的阻尼特性，建立了四轴转向架式车辆蛇形运动力学模型，列出运动微分方程.用变步长法求出的特征值研究车辆蛇形运动稳定性及机车临界速度，结论为：增大轮对的横向及纵向刚度和阻尼，可以减小转向架和车体的蛇形运动.得出了合理的优化参数，并提出了改进措施：将液压减振器改为电磁液压减振器或蛇形减振器，用锥式弹簧代替原来的柱式弹簧.
3.Analyze these data with time domain and frequency domain method and calculate vibration frequency according to vibration mark of work roller and strip, look for the vibration rule and vibration main frequency and suspicious vibration fountain, and primary make certain the cause consecutive hot rolling mill vibration.
对轧机在正常和振动的情况进行数据采集,在取得科学数据的基础上采用时域及频域分析的方法和根据带钢振痕计算的结果,并和前面的计算结果相对照,找寻轧机振动的规律和主频律以及可疑的振动源,确定了轧机振动的原因。
4.Abstract: Suppose we view a locomotive as a whole system,the space configuration of each locomotive is described by a 17-freedomed in horizon surface.Taking into account the elastic supporting of first and second system,hanging equipment and resistance characteristic,a space vibration model of four-axis bogie vehicle crawl vibration is presented.The characteristic root of the model is calculated.The stability of vehicle crawl vibration and critical velocity is researched.The result is that increasing vertical and horizontal stiffness and resistance of every wheel can decrease crawl vibration of bogies and carriages.And the optimization parameters are given.The improvements lie in using electromagnetic or crawl vibration absorber to replace hydraulic pressure vibration one and using awl spring to replace old pillar one.
文摘:将机车作为一个整体系统，用17个自由度描述机车在一般情况下横向平面的空间位置.考虑到一系、二系悬挂装置的弹性支承以及减振器的阻尼特性，建立了四轴转向架式车辆蛇形运动力学模型，列出运动微分方程.用变步长法求出的特征值研究车辆蛇形运动稳定性及机车临界速度，结论为：增大轮对的横向及纵向刚度和阻尼，可以减小转向架和车体的蛇形运动.得出了合理的优化参数，并提出了改进措施：将液压减振器改为电磁液压减振器或蛇形减振器，用锥式弹簧代替原来的柱式弹簧.
5.Compared with other kinds of gyro, FOG has born ability to restrict vibration, but its performance is still affected by vibration. This paper discusses the discipline of FOG vibration characteristic in mechanical vibration theory and vibration modulation on waveguide.
虽然与其它形式的陀螺相比，光纤陀螺具有天生的抗振优势，但使用中也暴露出振动环境对陀螺精度的不良影响，本文分别从机械振动理论和光路的振动调制理论对光纤陀螺振动误差的机理进行了研究，并且提出了抑制措施。
6.YBJ 1 blasting vibration self recording system and CRAS (The random signal and vibration analysis system) software were selected to survey, analyse and deal with the signal of blasting ground vibration. A practical equation about attenuation of blasting ground vibration wave was derived and blasting according to Safe Controlling Index was suggested. Finally, the problem on blasting vibration liquefaction under the river bank was discussed.
采用YBJ 1型爆破振动自记系统及CRAS随机信号与振动分析软件包对爆破地震振动信号进行了观测、分析和处理 ,得出了爆破地震波衰减经验式 ,并结合爆破现场实际与河堤防护要求建议严格按安全控制参数实施爆破 ,最后还讨论了河堤的爆破地震液化问题。
7.The paper studied controlling rotor vibration with the super-elasticity of SMA and SFD, set up the new equation of sys tern vibration according to the stress-strain curve of SMA in super-elasticity state, used the nonlinear theory and the dynamic stability theory to study the vibration of rotor controlled by SMA, discussed the stability condition of the system, obtained the relationship of system parameters when bifurcation was appeared, supposed a method that improves the stability of rotor system and restrains vibration amplitude though changing parameters, and finally validated the effect of restraining vibration of the improved system through emulation.
摘要研究利用形状记忆合金的超弹性和挤压油膜阻尼器控制转子振动，利用形状记忆合金在超弹性状态下的应力－应变曲线，建立了新的系统振动方程，运用非线性理论和运动稳定性理论研究转子在形状记忆合金控制下的振动状态，讨论了系统的稳定性条件，获得系统发生分岔时系统参数之间的关系；并提出了通过改变参数来提高系统稳定性和抑制振幅的方法，最后通过仿真验证了改进后的系统振动抑制效果。
8.ABVI model intelligent digital type automatical bearing vibration (velocity)tester is suitable for vibration test and selection of ball bearings from bearing bore diameter 10mm to outside diameter 62 mm. It can automatically sort two or four vibration classes according to preset vibration permissible value and peak factor value, and carry on doublefaced vibration measuring of bearing.
ABV?1 型智能化数字型全自动轴承振动（ 速度） 测量仪适用于轴承内径10 m m 到外径62 m m 的球轴承振动检验与分选，能够按预置的振动允许值和波峰因数值自动分选两个或四个振动等级，可自动进行轴承两面振动测量。
9.First making use of finite element analysis software Patran/Nastran to analyze the frequency response, the paper add the dynamic vibration absorbers to the host system, impose a steady-state simper harmonic motivation on the host system, and then calculate the vibration displacement and the vibration velocity of forced vibration of the finite element nodes.
在有限元分析软件Patran/Nastran中进行频率响应分析,计算主振系附加动力吸振器后受到稳态简谐激励时有限元节点的振动位移、振动速度,研究动力吸振器对结构振动的影响,动力吸振器自由度数与其减振频带宽度之间的关系;
10.Using the general software ANSYS in this paper, vertical coupling vibration of vehicle-rail-floating slab system is simulated, and then natural frequencies, foundation counterforce, vibration acceleration and displacement of car body, interaction force of wheel and rail are obtained, the decreasing vibration efficiencies of floating slab structure and it of general monolithic roadbed are compared, the vertical vibration characteristic of car body is analyzed asa train is passing through the floating slab structures different frequency.
本文利用通用软件ANSYS,进行了车辆—轨道—钢弹簧浮置板系统的竖向耦合振动分析,得到了耦合系统的固有频率、基础反作用力、车体振动加速度、车体位移、轮轨力等,比较了浮置板结构相对于普通整体道床结构的减振效果,分析了列车经过不同固有频率浮置板时的车体振动特性。
