- 更多网络例句与可振动的相关的网络例句 [注:此内容来源于网络,仅供参考]
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Methods electromagnetic shaker was used to create reproducible 250 hz vibration on the guinea pig bulla. the hearing function was monitored by compound action potential measurement. five animals were evaluated from 3 hours to 4 days after vibration stimulation for the blood labyrinth barrier change with 4.7 t experimental magnetic resonance imaging.
用电磁振荡器在5只豚鼠听泡上产生可重复的振动,其振动频率为250 hz,用复合动作电位评估其听功能,振动后3小时至4天用4.7特斯拉磁共振成像分析其血迷路屏障变化。
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The effect of tribology factors on bearing vibration is studied experimentally. AR model and WPT are used to processing the normal arid abnormal signals. The results are as follows:1. The vibration of ball bearings is caused by the tribology action of contact pairs of ball and ring races and has the essential of tribo-dynamics. Any factors affecting the tribology characteristics of contact pairs will affect vibration and noise of bearings consequently.2. Vibration characteristics of bearing keep almostly unchanged with the increasing of axial load expecting the increasing of nature frequencies. When radial load increasing with axial load unchanged, nature frequencies keep unchanged but some new vibration peaks appears in the spectrum.3. Vibration amplitudes are damped and nature frequency are enhanced with sufficient lubrication. Vibration and noise of bearings increase obviously and roar can happen and the contact surfaces scratch slightly under insufficient and unclean lubrication state. Bearing will be disabled in a few minutes without any lubrication.4. Bearing vibration is unstable under low speed. With the speed increasing, the vibration become stable and natural frequencies increase slightly but the amplitudes increase apparently.5. Bearing vibration can be excited only by some harmonics ofwaviness without lubrication and by all harmonics with lubrication based on the theoretical analysis.6. The nature frequencies of ball bearings decrease with the increasing sizes. When international clearance increasing, nature frequencies decrease in radial and increase in axial and angular and the amplitudes increase in radial and decrease in axial and angular. When the number of balls increasing, nature frequencies increase and amplitudes decrease. When the pitch diameter increasing, axial nature frequency increase and others nearly keep no change. When outer race groove curvature radius increasing, nature frequencies increase in radial and decrease in axial and angular and amplitudes keep no change in radial and increase in axial and angular. When inner race groove curvature radius increasing, nature frequencies decrease and amplitudes increase.7. The distortion in amplitude and frequency components of bearing vibration signals picked up by the present probe measurement method is founded and right conclusions cannot be achieved by the signals. When accelerometer is rigidly screwed with steel stud onto a flat outer surface of a ball bearing, vibration signal can be got without distortion and the reliability of research on bearing vibration is assured.8. AR model is suitable for large samples of bearing vibration signals, square root of length of samples can be used as the upper limitation of order determination and the FPE order selection criterion is effective. Many advantages of AR spectrum are founded over the classical based on FFT.9. Time-Frequency analysis is necessary for abnormal noise of ball bearings. WPT overcomes the principle shortcomings of STFT and proved to be a best tool to process the abnormal signals.
理论分析和试验研究表明: 1球轴承振动是钢球—滚道接触副中的各种摩擦学作用引起的,具有摩擦动力学的本质,任何对接触副的摩擦学特性有影响的因素都将对球轴承的振动和噪声特性产生影响; 2中心轴向载荷作用下,载荷增大使球轴承的固有振动频率升高,载荷越大同样的载荷增幅引起的频率升幅减小,足够大的中心轴向载荷作用下载荷的变化对球轴承振动的频率特性不会产生明显的影响; 3轴向和径向联合载荷作用下,径向载荷不大时球轴承振动的固有频率基本不变,但是可能引起变刚度激励的非线性振动,出现新的频峰,过大的径向载荷将使部分钢球脱离接触,使球轴承的振动和噪声呈现不稳定状态; 4润滑对球轴承的振动和噪声特性有重要的影响,良好的润滑对振动有明显的抑制作用,润滑不充分时,振动和噪声的水平会有明显增高,一定条件下还会激发接触副中的谐振,发出啸声,造成接触表面的伤害,无润滑干接触时,短时的运转就会损伤接触副表面,使振动和噪声迅速增大,并随时可能引发严重的磨损和卡滞失效;接触副润滑良好时,油膜的"刚化效应"使球轴承振动的固有频率有所提高,润滑剂中含有弥散性污浊时,振动的幅度总体升高,但弥散性污浊不会改变球轴承振动的频率特性;浙江大学博士学位论文:球轴承振动的研究 5低速时,球轴承振动的基本特征呈现不稳定状态,随着转速的提高,球轴承振动的频率特性趋于稳定,固有频率频峰升高; 6理论分析表明,干接触时钢球和滚道表面波纹度的某些谐波分量能激励球轴承的振动,振动的幅值与谐波幅值成正比,实际球轴承中钢球的分布不可能完全均匀,波纹度的激励作用会随时发生;润滑接触的分析表明,波纹度的任意谐波分量均能激励球轴承的振动; 7球轴承的几何和结构参数分析表明,球轴承尺寸越大,径向、轴向和角振动的固有频率越低;钢球中心圆直径增大,球轴承的径向和轴向振动的固有频率基本不变,角振动的固有频率有所上升,振动的幅频特性基本不变;径向游隙加大使球轴承的径向振动固有频率降低,轴向和角振动的固有频率有所升高,径向振动幅频特性的幅值升高,而轴向和角向降低;钢球的数量增多使球轴承振动的固有频率上升,幅频特性的幅值下降,径向振动的幅值下降最为明显;外圈沟曲率半径系数增大使球轴承径向振动的固有频率升高,轴向和角振动的固有频率降低,径向幅频特性基本不变,轴向和角向幅频特性幅值升高;内圈沟曲率半径系数增大使径向、轴向和角振动固有频率均下降,振动幅频特性的幅值均有升高; 8试验对比表明,传感器采用探针式安装时,由于探针接触副接触特性的影响,钡(量得到的球轴承振动信号有失真,采用专门设计和制作的试验球轴承,以固定式安装加速度计,首次测量得到了球轴承振动的真实信号,通过对振动信号的分析,验证了球轴承振动的理论模型; 9)基于时间序列分析的AR模型适用于大样本球轴承振动信号的分析,以样本长度的均方根值作定阶上界,FPE做判阶准则,给出的AR谱光滑,频率分辨率高,是球轴承振动分析的简便而可靠的手段; 10以时频域分析的小波包变换分析球轴承异音信号能够比较好地定位和聚焦异音发生的时间,时间间隔,频率范围,同样是球轴承振动分析的可靠的手段,可用作球轴承故障诊断技术。
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Under the high frequency vibrating action, the crystal grain formed on the surface of the crystal nucleus eradiation equipment would be broken and peeled off, thereby ejected to zinc molten pool continuously and served as crystal nucleus source of equiaxed grain during solidification.
结果表明,当一种带有冷却结构且进行高频振动的晶核发射器插入锌液内时,锌液在晶核发射器表面迅速形核且长大,在高频振动作用下表面形成的晶粒将被折断剥离,从而连续不断地弹射到锌液中,成为凝固过程中形成大量等轴晶的晶核来源;采用带有水冷和气冷结构的晶核发射器对锌液进行振动激发形核处理后,锌凝固组织中的等轴晶率可分别提高到65%和80%。
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Since the High-Lying Vibrational excited levels and dissociate behavior of gas diatomic molecules: H2, O2, N2 and CO are very important in actual studies and applications, using the algebra method and the algebra energy method to obtained full vibrational energy spectra {E} and molecular dissociation energies are base on limited experiment energy level {E} in this paper. The study result has provided the important high vibrational excited state energy level and the reliable dissociation energy data for the research partial dissociating gas physics and the chemical property.
鉴于气体双原子分子H2、O2、N2和CO的高振动激发态能级和离解行为在实际研究中的重要性,本文应用代数方法和代数能量方法,以部分气体双原子分子有限的实验能级[E]为基础,获得了H2-X1Σ、O2-A^3Σ、O2-c1Σ、N2-X1Σ和CO-X^1Σ共5个电子态的完全振动能谱{E}及其分子的离解能,为研究部分离解气体的物理和化学性质提供了重要的高振动激发态能级和可幸的离解能数据。
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In the present paper, the application of finite element method and its principle is discussed for this kind of calculations, a technique for the calculation of local grillage vibration is deduced and an example for...
本文讨论用有限元方法和原理应用于这类计算,推导了板架局部振动的计算方法,给出了计算实例。通过计算表明,本文方法可用于实际,为舰船振动校核计算提供了手段。
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The study on the attenuation law with statistic analysis and dimension analysis reveals that the attenuation index, closely relative to the properties of soil mass, can be expressed as a third order polynomial of vibrating frequency f.
用统计分析和量纲分析的方法研究了强夯振动的衰减规律,发现强夯振动衰减指数与场地岩土体的性质密切相关,可表示为振动频率的三次多项式的形式,为强夯振动的频域分析以及利用强夯振动研究岩土体的性质奠定了基础。
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Thirdly, the Hopf bifurcation of the self-excited vibration model with moving boundaries is considered.
研究了具有运动边界的自激振动模型的Hopf分叉问题,从系统自激振动的极限环生成和消亡的过程可发现:系统在边界的运动速率变化时能够发生一阶超临界Hopf分叉。
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From the angle of vibration, powertrain is divided into a bending system and a torsional system.
从振动的角度看,车辆动力传动系可分为弯曲振动系统和扭转振动系统。
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From the view point of vibration,automobile is divided into a body vibration system and powertrain torsional vibration system.
从振动的角度看,汽车振动系统可分为车身振动系统和动力传动系扭转振动系统。
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The non-uniform flow behind a rigid cylinder row with a small pitch ratio T/D= 1.5 is characterized by narrow and wide near wakes and multiple frequencies, and the vortex shedding behind a rigid cylinder row with T/D= 2.0 is replicated properly by the simulation results.
此外,还研究了单列自由振动的弹性圆柱在间隙比为2.0时的流体诱导振动问题,结果表明:在大振幅条件下,流体诱导力在x方向和y方向有较强烈的耦合;随着振幅的减小,x方向振动对y方向振动的影响可以忽略,可采用单自由度的动力学模型假设进行计算。
- 更多网络解释与可振动的相关的网络解释 [注:此内容来源于网络,仅供参考]
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forced vibration:强迫振动
按照振动系统中是否存在阻尼作用,振动分无阻尼振动(non-damping vibration)和 阻尼振动(damping vibration) ;按照对系统所施加作用力的形式,振动又可分为自由振动 (free vibration)和强迫振动(forced vibration) .下面分别进行分析.
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forced vibration:振动
按照振动系统中是否存在阻尼作用,振动分无阻尼振动(non-damping vibration)和阻尼振动(damping vibration);按照对系统所施加作用力的形式,振动又可分为自由振动(free vibration)和强迫振动(forced vibration).
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harmonic oscillation:谐振动
在振动中,又分为谐振动(Harmonic oscillation)与非谐振动(Non-harmonic oscillation). 不论是谐振动或简谐振动 (又名简谐运动),它们的共同特徵即是其函数拥有相同的频率,且可将两个以上的三角函数(ex:sine, cosine函数)用适当的单一三角函数来替换.
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vibrate:振动
vibraphonist 铁琴演奏家 | vibrate 振动 | vibratile 可振动的
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vibrated:响遍四方/十分响亮
vibraphonist /铁琴演奏家/ | vibrated /响遍四方/十分响亮/ | vibratile /可振动的/颤动的/振动的/
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vibratile:可振动的
vibrate 振动 | vibratile 可振动的 | vibratility 振动性
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vibratile:颤动的
vibratile 颤动的 | vibratile 可振动的 | vibrationg 心情激动
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vibratile:可振动的/颤动的/振动的
vibrated /响遍四方/十分响亮/ | vibratile /可振动的/颤动的/振动的/ | vibratility /振动性/
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vibratility:振动性
vibratile 可振动的 | vibratility 振动性 | vibration 振动
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accostable:可驶近的
accordion-vibration mode 水平纵向振动形式 | accostable 可驶近的 | accostable 可驶近的可接近的