- 更多网络例句与接触作用相关的网络例句 [注：此内容来源于网络，仅供参考]
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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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With the increase amount of power, the magnetic flux density in the mold and the soft contact effects of high frequency magnetic field all increased.
随着电源功率的提高，电磁结晶器内高频磁场的磁感应强度增大，高频磁场的软接触作用效果增强。
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In this simulation, it is the first time to take both of the hydrodynamic interaction and fiber-fiber collision into consideration.
本文首次在数值模拟中同时考虑纤维间的水动力相互作用和纤维间的直接机械接触作用。
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Incurrent research, aiming at the rupture problem engendered in the shooting process of acertain 5.56mm automatic rifle, the strain and stress distributions on the cartridge caseunder the action of axial pull have been analyzed. Based on the theories of elastic-plasticmechanics and contact mechanics, a mathematic and physical model of the cartridge-caseand chamber system has been set up; and based on the platform of the general softwarepackage APDL of ANSYS for finite element analysis, a parameterized model of thecartridge-case and chamber system has also been established. The method for nonlinearFEA has been adopted to analyze the stress distribution on the entire cartridge-case andchamber system, and the method of contact element has been employed to investigate thecontact stress between the cartridge case and chamber, and then the influences of frictioncoefficient and locking space on the static and dynamic stress and strain response of thecartridge case and chamber to the action of power gas have also been discussed. On thebasis of a lot of numerical tests, a kind of element Plane13, which is concentrated incoupled computation of heat and construction, has been used finally to simulate thetransient response of the cartridge-case and chamber system to the power gas. Throughloading the temporary thermal characteristics of explosive gas in the procedure of emulate, the corresponding transient thermal stress distributed on the entire system under thecombined load of transient thermal stress and transient pressure has been obtained. Owingto these comprehensive considerations, the numerical results obtained in this paperrepresent the actual situations comparatively exactly.
本文针对某5.56mm自动步枪在工作中出现断壳的问题，分析了弹壳在轴向拉力作用下的应力应变；基于弹塑性力学及接触理论，建立了弹壳弹膛系统的数学、物理学模型，在通用有限元ANSYS软件的参数化建模工具APDL平台上，建立了弹壳弹膛系统的参数化模型；采用非线性有限元法计算了弹壳弹膛系统的整体应力，引入接触单元法分析弹壳和弹膛的接触压力，探讨了在不同的摩擦系数和不同的闭锁间隙对弹壳弹膛静、动态响应的影响；本文进行了大量的尝试，最后确定采用热、结构耦合单元Plane13，在计算中加载了火药气体的温度历程，成功的获得了弹壳弹膛系统在瞬态的热载荷和瞬态的压力载荷同时作用下弹壳弹膛系统的热应力数值解，考虑因素全面，比较真实的反映了弹壳弹膛系统在火药气体压力和热载荷下作用的情况。
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As it is well known that there is a real gap between foundation and soil. It is important to consider the nonlinearity of the process of contact, separate and recontact between foundation and soil.
基础与地基之间存在着实际上的缝隙，在共同作用过程中存在接触、脱开再接触的过程，真实地反映共同作用的这种接触非线性性状是相当重要的。
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The results indicated that immobilized E2 protein remarkably raises the level of phosphorate-tyrosine in Raji cells , but the soluble E2 protein hasn't obvious impact to phosphorylation of tyrosine of Raji cell. It was presumed that immobilized E2 protein was resembled to natural viron enveloped E2 protein and may more efficiently interact with CD81 molecule.
这可能是因为固相化的E2蛋白类似天然的病毒颗粒，在构象上要更接近于天然的病毒颗粒表面E2蛋白，而且固相化后的E2蛋白在单位体积的密度要高于可溶性的E2蛋白单位体积的密度，使其能够更充分的与细胞表面的CD81分子相互接触作用。
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In addition, tyre print and pressure distribution on road are analyzed, which is a foundation to the study of vehicle-road system dynamics and analysis of contact action between tyre and surface.
另外，在论文第二章中分析了汽车行驶过程中轮胎印迹与压力分布，为轮胎和路面的接触作用的深入分析和车辆-路面系统动力学的研究提供了依据。
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According to the principle of elasticity-viscoelasticity, equations of stress and strainfor EMP surface layer under the load of different indenters and indenter contact whilesliding were calculated separately. The indenters contain sphere, cylinder and taper.
粘弹性对应原则，计算出了受一般外形压头法向无摩擦力作用下和受球、圆柱平头、圆锥形压头法向载荷作用下，以及在滑动过程中相应压头形态接触作用下EMP表层的应力、应变方程。
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Initially, assuming that the contact between cam and tappet is"dry contart", a dynamics model of Hertzin contact stiffness and impact damping is established. Next, with dynamic load on cam—tappet pair from the model, an analysis is made both to unsteady EHD oil film in cam—tappet pair under condition of full and partial lubrtication and to wear characteristics of cam profile. then, according to the fact that the lubrication in cam—tappet contact surface is EHD lubrication, taking the interaction between stiffness and damping of unsteady EHD oil film and rigidity of solid object contact into account, a dynamics equation of valve train relating to the dynamic effect of EHD oil film is built up and solved. Consequently, a further study is made on the dynamic characteristics of valve train under interaction of EHD oil film dynamic behavior and the problem of EHD lubrication in cam—tappet pair. Finally, the dynamic effect of full and partial EHD oil film is studied accordingly.
首先，通过对凸轮—挺杆接触为&干接触&的假设，建立了考虑赫兹&接触刚度&和冲击&阻尼&的配气机构动力学模型，用由此求得的凸轮—挺杆表面动载荷对凸轮—挺杆进行了全膜状态和部分膜状态非稳态弹流润滑分析，并研究了凸轮轮廓的磨损规律；然后，是在凸轮挺杆表面存在弹流动压油膜这一事实的基础上，相当于在动力学方程中考虑非稳态弹流油膜的&刚度&、&阻尼&和固体接触&刚度&的耦合作用，建立并求解了考虑弹流润滑行为动力学效应的配气机构的动力学方程，从而深入地研究了弹流润滑行为与动力学行为耦合作用下的配气机构动力学特征以及凸轮挺杆弹流润滑问题；作为前面工作的对应部分，考虑弹流油膜动力学效应的研究工作也同样分为全膜状态和部分膜状态进行。
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BEARER OF FREEDOM - YEAR OF THE WINGED HORSE Keynote: Freedom in Action Truth in Action: Divine Union, Freedom, Power Colors: Pale Lavender - Pale Yellow - Peach Animal Totem: Horse Aquatic Totem: Manta Ray Year of Birth: 2004, 2022, 2040 4、自由肩负者-飞马之年基调:起作用的自由行动真相:神性统一、自由、力量颜色:淡紫色-浅黄色-桃色动物标志:马水生物标志:电鳗出生年份:2004, 2022, 2040 Those born under the archetypal pattern of Freedom in Action will be gifted at allowing for evolution and ascension in their own life dance, the group that they affiliate with, and the whole of humanity.
那些诞生在本原型模式者，将擅长于让进化和提升在其自身生命舞蹈、在所加入的群体及整个人类中出现。这一类型的人类可能会感到过于受局限而不能在同一个地方停留太长时间；就像过去的吉普赛人一样，他们会从一个地方流浪到另一个地方，让更大自由流入与他们所接触的一切人的生命舞蹈中。
- 更多网络解释与接触作用相关的网络解释 [注：此内容来源于网络，仅供参考]
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contact aureole：接触变质带,接触晕
接触蚀变作用 contact alteration | 接触变质带,接触晕 contact aureole | 接触角砾岩 contact breccia
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contact metamorphism：接触变质作用
标准的倾向线与走向线互相垂直,是岩层倾斜一端的水平投影;而在岩层的真正倾斜表面上下引一条与走向线互相垂直的直线,则为倾斜线;此线与倾向线之间的夹角,叫做倾角.变质作用可分为两大类:接触变质作用(contact metamorphism)及区域变质作用(r
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contact metasomatism：接触交代作用
contact metasomatic rock 接触交代岩 | contact metasomatism 接触交代作用 | contact mineral 接触矿物
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contact metasomatism：接触交代(作用),接触换质(作用)
接触变质(作用) contact metamorphism | 接触交代(作用),接触换质(作用) contact metasomatism | 接触矿物 contact mineral
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contact coking：接触焦化<作用>
contact chamber 接触室 | contact coking 接触焦化<作用> | contact corrosion 接触腐蚀
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pyrometamorphism：高热变质作用
高热变质作用(pyrometamorphism)又称烘焙变质作用(optalic metamorphism),是一种特殊的热接触变质作用,主要指与喷出岩或次火山岩接触的围岩或捕虏体中发生的小范围极高温的变质作用.
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contact action：接触作用
cont. on 下接 | contact action 接触作用 | contact adhesive 接触粘合剂
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contact action：接触作用,接触动作
consumptive water 空耗水 | contact action 接触作用,接触动作 | contact actuation time 触点动作事件
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contact metamorphic action：接触变质(作用)
接触"褐铁矿" contiguous limonite | 接触变质(作用) contact metamorphic action | 接触变质(作用) contact metamorphism
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action by contact：接触作用
action at distance 超距作用 | action by contact 接触作用 | action compulsive 动作强迫性