Based on the theoretical formula of fluid force acting on a lateral vibrating cylinder immersed in unbounded fluids, expressions for dimensionless dynamically additive mass and damping are obtained by inductive definition and non-dimensionalization.
根据文献报道的圆柱体在无限域流场中横向振动时受到的流体作用力解析表达式，通过归纳定义和无量纲化处理得到了代表圆柱体在流体中动力学特性的无量纲动力附加质量和无量纲动力附加阻尼表达式，又通过分析各种因素对动力附加质量和动力附加阻尼的影响，研究了圆柱体在无限域流场中横向振动时的动力学特性。
The results state as follows: the attenuation coefficient of acceleration increases linearly with the decrease of the distance between sideform and vibrator, as well as with the decrease of concrete slump; the acceleration amplitude distribution in slip forming concrete is a surface on which the maximum acceleration at vibrator is peak, damping exponentially on both lateral and longitudinal directions; if slip forming concrete is consolidated completely and obtains enough strength, the maximum acceleration in concrete should excess 8g; when concrete has 0 —2, 3—5 or 6—8cm slump, the suitable paving speed is 1, 3 or 6m/min respectively.
研究结果表明：加速度衰减系数随侧模板到振捣棒的距离的减小和混凝土坍落度的减小而线性增大；滑模混凝土中加速度幅值的分布呈现出以棒位最大加速度为峰值、沿纵横向为指数衰减的曲面；滑模混凝土达到充分密实和足够强度的混凝土内最大加速度值应超过8g；对坍落度分别为0～2、3～5和6～8cm的混凝土混合料，适宜的滑模摊铺速度应分别为1、3和6m/min。
Fringe to output of signal, the transmitting object is always digital signal, A/D is no needed, so it has advantages of anti-jamming, easy to transmit and simple signal processing. It is radically different from existing digitized geophone. 2 The input signal from platform vibrator can be really restructured by dynamic test. 3Resolution of amplitude measured by grating geophone can reach to 2.5μm. 4 Quick response and large dynamic range (reach to 84dB). 5 No impact of transverse vibration to number representation of moir? fringes is beneficial to restrain disturbance. 6 Principle of sensor brings down the risk of industrialization. 7 In the structure, Designs of lateral vibration limiting spring, adjuster of grating and damping assure the parameter consistency of sensor, it is easy to volume production.
本研究成果形成光栅数字地震检波器产品具有以下特性：1）传感器直接输出数字脉冲信号；从莫尔条纹的产生到信号的输出，均以数字信号为传输对象，不需要A/D转换环节，因此具有抗干扰、易传输和信号处理方便等优点，从本质上不同于现有的数字化地震检波器；2）动态测试能够真实重构振动台输入信号；3）动态测试检测振幅的分辨力达2.5微米；4）响应快、动态范围大（目前已达84dB）；5）横向振动对光栅莫尔条纹记数信号无任何影响，有利于压制干扰；6）传感器原理降低了产业化的风险；7）结构中设计了横向限振片、光栅调节器及阻尼调节器，保证了检波器参数的一致性，易于批量生产。
The sensitivity of short period damping ratio ζ〓 and frequency ω〓 subsidence of roll mode constant τ〓, Dutch roll mode damping ratio ζ〓 and frequency ω〓 and lateral acceleration of the position of pilot seat a〓 which are closely relative with an aircraft's high AOA maneuvering to aerodynamic derivatives at high AOA before stall AOA has been studied with equivalent system method. And the results show that ζ〓 and ω〓 are very sensitive to the aerodynamic derivatives Cmδh and Cmα, τ〓 and a〓 are sensitive to Clδa and Clp, ζ〓 and ω〓 to Cnr, Cnδr, Cnβ and Cyβ, and the other aerodynamic derivatives have only a little influence on the dynamic characteristics of the aircraft.
大迎角飞行品质对气动导数的敏感性：利用等效系统拟配方法，计算并讨论了纵向短周期阻尼比ζ〓及频率ω〓，横向滚转模态时间常数τ〓，荷兰滚模态的阻尼比ζ〓、频率ω〓及驾驶员座位处的侧向加速度a〓对大迎角气动导数的敏感性，结果表明ζ〓及ω〓对升降舵操纵效能C〓及升力线斜率C〓比较敏感，τ〓及a〓对副翼操纵效能C〓及滚转阻尼C〓比较敏感，而ζ〓及ω〓则对方向舵操纵效能C〓、偏航阻尼C〓及侧滑导数C〓与C〓比较敏感，其余导数影响相对较小。
Secondly, the air damping of CFRP cable of free vibrationg and forced vibration induced by lateral forces of the wind was analyzed and the effect of vibration amplitude as well as wind speed on the damping of CFRP cable was discussed based on the comparison with that of steel cable.
其次，对CFRP斜拉索自振状态及横向静风作用下的空气阻尼特性进行了计算分析，通过与钢索计算结果的对比，讨论了拉索振幅及风速对CFRP斜拉索阻尼特性的影响。
The nonlinear Winkler-Kelvin sub-grade model is adopted in this simplified model and the complicated 3-D problems of the soil-single piles dynamic interaction are simplified to the 1-D, that is to say, the lateral nonlinear acting force of the soil to the pile shift is simulated with thehorizontal nonlinear springs which have the continuous uniform distribution, while the nonlinear spring restoring force is described by the deteriorated Bouc-Wen model; the radiation damping and material damping due to the energy dissipation and inner friction in the soil are displayed with the dashpots which are in parallel with the horizontal nonlinear springs.
该模型采用非线性Winkler-Kelvin地基模型，将复杂的地基土-单桩动力相互作用的三维问题，简化为一维问题，即，地基土对桩轴的横向非线性作用力，由随深度均匀分布的水平非线性弹簧模拟，非线性弹簧恢复力由退化的Bouc-Wen模型描述；地基土中由于能量耗散和内部摩擦而产生的幅射阻尼和材料阻尼，由与水平非线性弹簧并联的粘壶表示。
The results show that the transverse perturbation is a major factor in generating system shimmy, and the saddle damping moment imposed appropriately can be effective in improving the lateral stability of the system.
研究结果表明：横向扰动是产生系统摆振的主要因素，施加适当的鞍座阻尼力矩可有效改善系统横向稳定性。
Lateral seismic response analysis of end bearing pile under the influence of bedded ground wave motion and radiant damping
端承桩在层状地基波动与辐射阻尼影响下的横向地震反应分析
The lateral semi-active damper based on On/Off damping control laws was adopted in secondary suspension system. The time delay of the semi-active suspension system was taken into account.
在客车二系悬挂系统中采用具有开关阻尼控制的横向半主动减振器，并考虑半主动悬挂系统的时滞。
At the same time, the analysis results also show that the main parameters affecting the isolation effect of story isolation are lateral stiffness、location and damping ratio of isolation system.
研究还发现隔震层的水平刚度、位置和阻尼比是影响层间隔震结构减震效果的主要参数。
Analysis on joint operation of swash plate lateral slope and distributor damping aperture in axial piston pump
轴向柱塞泵斜盘横向倾角和配流盘减振孔共同工作时的计算
For a four-axle power car with secondary big deflection helical springs, it is important that the secondary lateral stop clearance matches well with the secondary lateral damping characteristic to obtain a good dynamic curve negotiating performance.
对于采用二系高挠螺旋弹簧的动力车，二系横向止挡间隙与二系横向减振器阻力特性的合理匹配是获得良好的动态曲线通过性能的一个重要因素。
The influence of different factors to the dynamic response of bridges is analyzed, such as vehicle speed, loading lateral position, road surface roughness, radius of curvature, super elevation degree and damping of bridge.
在此基础上，分析了车速、车辆横向位置、路面不平顺、曲率、超高及桥梁结构阻尼等因素对桥梁动力响应的影响。
By adding stiffening ring on the bellows, both the axial and lateral damping ratios increase, while the natural frequencies decrease.
给波纹管加上加强环后，轴向和横向阻尼比均增加，而固有频率均降低，动态刚度则与层与层之间是否有阻尼材料有关；
While the added-mass, damping coefficient as well as exciting force and moment are the each coefficient of the lateral coupled equations that Salvesen derived by the section velocity potential.
其中附加质量、阻尼系数和扰动力及力矩利用赛尔维逊由剖面速度势导出的横向耦合运动方程组中的各个系数。
Sequentially, a numerical simulation of the coupled lateral and torsional vibrations of FRC is carried out by considering several aspects, such as changed speeds, mass eccentricities, misalignment values and damping coefficients.
从转速、质量偏心、不对中量和阻尼系数等几方面进行弯扭耦合振动数值仿真。
Due to the vibrational damping of soils at various frequencies, the internal forces may be less than that when subjected to unidirectional lateral loads under static conditions.
由于土的振动阻尼参与，致使基桩的受力状况较静力分析时更为复杂，在不同的频率下，桩身内力可能较单向水平力系作用下的要小。
Applying phase of strain mobility, damping of torsion vibration is bigger than lateral vibration.
通过应变导纳位相，分析了弯扭杆件材料的扭振阻尼是大于弯曲振动的阻尼。
In the paper, the mathematical model of lateral vibration dynamic system for a bit of hole digger was established. Regarding the damping function as the control variable, the optimal control problem of the system was studied and two conclusions were made in the end.
建立了一类挖坑机械钻头横向振动系统的数学模型，并以阻尼函数作为控制变量，研究了该系统的最优控制问题，得出了两个定理。
The lateral semi-active damper based on On / Off damping control laws was adopted in secondary suspension system. The time delay of the semi-active suspension system was taken into account.
在客车二系悬挂系统中采用具有开关阻尼控制的横向半主动减振器，并考虑半主动悬挂系统的时滞。