理论分析表明，采用损耗因子在0.1至0.4之间的常用的橡胶O型圈，即可极大地降低一阶临界振动响应。
Theoretical results showed that EORD, using general elastomer O-rings with loss-factor between 0.1 and 0.4, was enough to reduce first critical response vibrations of the experimental rotor system.
从机械振动理论出发，用可靠性设计中的联结方程，得出了其在常用工况下按传动轴的临界转速进行可靠性设计的公式。
The paper starts from the theory of mechanical vibration, with tie equipment in the reliability design, and obtains a formula of design on critical speed in common use situation.
研究流体的速度和压力对载流三维管道振动频率的影响，并且探讨管道失稳时流体的临界速度。
This paper deals with the influence of fluid velocity and pressure on vibration frequency of stereoscopic pipe, and investigates the critical velocity of fluid in unstable case.
从松散与密实的概念入手，提出用临界孔隙比等参数判断散料的振动松散与密实效应，并进行了相关的实验研究和理论分析。
Beginning with the concept of loosening and compacting, the paper determines effect of vibration on loosening and compacting of dispersed media using such parameters as critical porosity.
并利用转子支承都具有一定弹性的特点，通过改变转子支承刚度达到调整转子临界转速和振动形态的目的。
Then the critical rotate speed and vibration shape are changed by changing the supporting stiffness with the characters of flexibility of rotor.
本文利用振动测试记录，具体论证了汽轮机排汽端一侧轴承松动，而导致汽轮机第二临界转速共振和强烈共振。
By analysing the amplitude of the shaft vibration, this article concludes that when the bolts get loose, it will result in resonance at the second critical speed and serious vibration.
研究表明，当扰动频率低于多壁碳纳米管的临界频率时，振动模态是同轴的；
The analysis shows that when the frequency is lower than the critical frequencies of the shells in MWCNT, the vibration mode is almost coaxial.
采用振动理论，对立式冲击破碎机转子系统临界转速进行理论分析，并进行了实验验证。
The paper theoretically analyzes the critical speed of the rotor system of a vertical impact crusher by use of the vibration theory, and the analyzed result is verified by experiments.
研究结果为亚临界雷诺数范围内热交换器管束的复杂流体诱导振动等问题提供了一种可能的计算方法。
The proposed method enables to simulate complex flow induced vibration occurring in heat exchanger tube bundles at sub-critical Reynolds number.
计算表明，2 750TEU集装箱船的局部振动性能良好，满足亚临界动态设计的设计衡准。
The results indicate that the local vibration characteristics of 2 750 TEU container vessel are satisfactory and meet the requirements of sub-critical dynamic design criteria.
根据这一振动模型，推导了齿轮副的平均单齿刚度、单对轮齿啮合综合刚度、有效质量、固有频率与临界转速等一系列计算公式。
The model is used to understand a series of formulae, for example, mean single tooth stiffness, gear pair mesh synthesizing stiffness, effective mass, nature frequency and critical rotating speed.
介绍了溶剂气冷却器振动原因是进口区域的横流速度大于临界速度，以及壳程结构不合理。
Investigation was showed that the vibration of solvent vapor cooler was caused by excessive flow velocity and improper shell structure.
建立了深水环境下涡激振动的非线性微分方程，给出疲劳计算公式，并对比了浅水控制方法与深水控制方法计算的临界跨长。
This paper establishes nonlinear differential equations, gives the fatigue equations and compares the critical spanning of pipeline of calculated results from the shallows and deep water.
在稳态试验的基础上，对转子过前两阶临界转速的振动抑制进行了研究，并实施开环瞬态振动控制。
On the basis of steady state tests, the vibration suppression of the rotor through the first two critical speeds has been done.
当本体长度达到直径的6倍以上时，转子的第二临界速度将接近于电机的运转速度，运行中可能发生较大的振动。
When the body length to 6 times the diameter of the above, the rotor speed will close to the critical speed motors, operation of vibration may occur.
根据振动流化床床层动力学特性，提出了第一、第二流化段，第一、第二临界流化速度的概念。
According to the dynamical characteristic of the vibrated fluidized bed, the first and second fluidization stages and the first and second critical fluidization velocities were put forward.
从流化床临界流化速度的定义出发，得出了振动流化床第一临界流化速度数学模型。
Based on the original definition of the critical fluidization velocity, a mathematical model was proposed to predict the first critical fluidization velocity.
讨论了一类中立型时滞微分方程所有解的振动性，获得了临界状态下该方程所有解振动的一个充分条件。
Considering a kind of neutral delay differential equations, a sufficient condition for the oscillation of all solutions of neutral delay differential equation in critical state is obtained.
该模型具有简便、快捷以及能够对亚临界雷诺数下的流体诱导振动问题进行计算等优点，为多圆柱流体诱导振动问题提供了一种新的计算模型。
The proposed model is expected to provide a new method to evaluate the flow induced vibration of a large number of flexible tube bundles with a relatively simple computing task.
轴系非稳定振动是超临界机组的一种重要的振动故障。
It is concluded that, the property of non-steady vibration of such kind unit is of steam-excited vibration.
通过建立2.5维有限单元结合薄层单元方法，研究了接近或超过临界速度的移动荷载作用下地基三维振动问题。
A hybrid method of 2.5 dimensional finite element and thin-layer element was developed to study dynamic ground responses due to moving loads.
通过试验得到了涡激振动的临界风速，并分析了栏杆、风攻角对涡激振动的影响。
Through experiments, the critical wind speed of the vortex-induced vibration is received. And analyzed effect of the railing and the wind attack angle on the vortex-induced vibration.
通过试验得到了涡激振动的临界风速，并分析了栏杆、风攻角对涡激振动的影响。
Through experiments, the critical wind speed of the vortex-induced vibration is received. And analyzed effect of the railing and the wind attack angle on the vortex-induced vibration.
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