本文介绍了一种在现场用振动衰减系数来估计岩体质量的新方法。
This paper presents the field estimation on rock mass quality by means of vibrational decrement.
爆破振动衰减较快，而后座和塌落振动因其低频特性衰减相对较慢。
We also found that attenuation of backlash and collapse vibration wave are more rapid than the backlash and blasting vibration wave for the low velocity trait of them.
结果表明发动机振动衰减明显，该振动主动控制系统的设计是可行的。
The results show that there is obvious vibration reduction for the engine, and the design of active vibration control system is feasible.
试验结果表明：具有不同石墨形态的铸造合金材料对振动衰减的能力差别很大。
The experimental results show that the morphology of graphite has greater effect on the vibration attenuation property of the casting alloy materials than other factors.
水平向振动与竖向振动衰减快慢不同，难以用同一衰减公式表示等有意义的结论。
The attenuation rate of horizontal vibration is different from that of vertical vibration and could not be expressed by using a same formula.
抗阻尼性能强：金属钛受到机械振动、电振动后，与钢、铜金属相比，其自身振动衰减时间最长。
Strong antidumping property: When titanium is affected by mechanical vibration or electric oscillation, its vibration damping time lasts the longest time, compared to that of steel and copper.
对龙滩水电站蠕变体边坡的爆破振动进行观测、分析和处理，得到了爆破地震波衰减经验公式。
The blasting vibration of creep mass slope of Longtan hydropower station is observed, interpreted and analyzed. The experiential formula of decay for the blasting earthquake wave is obtained.
本方法亦可用于分析爆破振动信号在传播过程中能量随时间的衰减规律，对综合研究爆破机理和爆破地震波有指导意义。
The method can be also applied to analyze the attenuation laws of energy for blasting vibration signals during the propagation, blasting mechanism and blasting seismic effects in its entirety.
分析认为，氧化锌晶须渗入在复材中将形成微观的阻尼结构，起到降低固有振动频率和增大衰减率的作用。
By the analysis penetration of ZnOw into the compound board will compose a microscopic damping structure, which can reduce the vibration frequency and increase the damping ratio.
从而得到了打桩引起的地面振动的衰减特性。
The attenuation characteristics of ground vibration caused by pile driving were proposed.
结果表明，当反应时间较大时，反应速度是以指数衰减或小阻尼振动的方式趋向稳态。
The result indicates that the enzyme reaction velocity tends towards steady state with the form of index attenuation or small damped vibration when reaction time is longer.
本文给出了一种汽轮发电机组轴系扭转振动模态对数衰减率的计算方法。
This paper presents a method for calculating the modal logarithmic decay ratio of the shaft set torsional vibration in a turbogenerator unit.
得到竖向和水平向振动位移衰减公式。
The attenuation formulas both of vertical and horizontal vibrating displacements are obtained.
最后给出数值结果，表明磁场的变化对振动频率及衰减系数的影响。
By using a numerical method, the effect of changing in magnetic field upon vibration frequency and coefficient of reduction is presented.
隔振沟对振动加速度的衰减作用随载荷强度的增加而增强。
The attenuation function of the isolation trench to the shock vibration is more effective with increase in the intensity of the blast loading.
当扭振振幅或扭振应力超过限值时，设计橡胶扭振减振器将振幅衰减到容许范围内，消减曲轴系统的扭转振动。
When the torsional vibration amplitude and stress exceed the limit, the rubber torsional vibration damper should be designed to reduce the amplitude within the permitted range.
该变阻尼能有效地衰减振动。
轴系扭振的模态对数衰减率正比于每个振动周期耗散的能量与峰值应能的比值。
This logarithmic decay ratio of the shaft set is in direct proportion to the ratio of the energy dissipated per cycle to the peak strain energy.
对某水电站地下洞室爆破振动进行观测、分析和处理，得到了爆破地震波传播衰减经验公式。
The blasting vibration of an underground chamber is observed, analyzed and interpreted. The experience formula of decay for the blasting earthquake wave is obtained.
本文通过大量实测实验研究了火车、汽车在运行过程中引起的地面振动特性和衰减。
This article introduces the characteristics and attenuation of ground vibration caused by moving trains and motor vehicles obtained from a great number of tests, research and field work.
应用振动波传播理论引出加速度衰减系数的概念，并对加速度衰减系数的试验结果进行了分析。
Using theory of vibration wave propagation, the concept of the attenuation coefficient of vibrating acceleration is drawn, and the test results of attenuation coefficient are analyzed.
悬架系统的主要作用是缓和车辆在行驶中所受路面的冲击，衰减振动，保证车辆行驶的平顺性和操纵稳定性。
Suspension system is mainly used to relax road surface impact, attenuate vibration, ensure vehicle ride comfort and stability control capacities during running.
数值结果验证了该主动控制策略能够有效衰减风荷振动，从而提高了馈源轨迹跟踪精度。
Numerical simulation results show that this active control strategy can effectively attenuate the wind-induced vibration and improve the tracking accuracy of the feed source.
结果表明，具有主动控制悬架的汽车，其纵向角振动得到明显的衰减。
The simulation results indicated that the severity of pitching vibration of vehicle with an active suspension can be obviously reduced.
针对自由衰减振动信号的连续谱，提出了一种估计特征参数的方法。
A new method of estimating characteristic parameters for continuous spectrum of response signal of damped free vibration is presented in this paper.
因而在实际传输的条件下，光纤振动引起的附加衰减完全可以忽略。
Through numerical calculation and experiments, conelution is made that these additional attenuations are quite small, which can therefore be neglected, in the first approximation.
结果表明，主动悬挂方式能有效衰减振动，尤其是共振点处的振动。
The result shows that the active suspension mode can damp the vibration effectively, especially the vibration at the resonance point.
提出了一种既能减小管路振动又能衰减流体压力脉动的管路消振器结构。
In this paper, a new pipe attenuator that can reduce both the pipe vibration and the pulsating fluid pressure is designed and developed.
提出了一种既能减小管路振动又能衰减流体压力脉动的管路消振器结构。
In this paper, a new pipe attenuator that can reduce both the pipe vibration and the pulsating fluid pressure is designed and developed.
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