The plunger is forced to undergo a simple harmonic vibration parallel to the direction of the tube.
活塞在平行于长管的方向作合谐摆动。
Washing machine; vibration and noise; modal analysis; finite element and harmonic response
洗衣机；振动和噪声；模态分析；有限元；谐响应
Based on resonance Raman spectra, by on-body measuring the second harmonic of stretching vibration of carbon-carbon conjugated double bond in lycopene and β-carotene, the content of lycopene and β-carotene can be obtained according to the integrated intensity of each component calculated by software.
利用共振拉曼光谱技术，通过在体测量番茄中的番茄红素和β-胡萝卜素 C≡C 碳碳共轭双键伸缩振动的二次谐波，用软件获得每种成分光谱的积分强度而得到番茄红素和β-胡萝卜素的含量，为在体检测同种基团成分含量提供一种方法。
In the harmonic response analysis, imposed damping vibration equation has been established.
在稳态分析中，推导了受迫阻尼振动的稳态响应公式。
According to longitudinal vibration partial differential equation of rod, the longitudinal vibration displacement response of uniform infinite rods by the harmonic point forces was derived.
longitudinal vibration ； wave approach ；从杆纵向振动的偏微分方程出发，推导了无限长杆在简谐点力作用下的纵向振动位移响应，在此基础上，基于结构线性假设和波的叠加原理，得出了有限长梁纵向振动谐响应的波动表达式，列出了常用的边界条件。
3 Installation site should not be exposed to direct sunlight and rain drenched, avoid is not too violent vibration and essien method, the distance between each other should be greater than 30mm, Summer environment temperature is higher, should adopt effective measures to ensure good ventilation cooling, 5.3.4 before installation must be fully considered, after the input capacitors caused by factors such as voltage, prevent capacitor voltage in long-term operation under, 5.3.5 in installation, must pay attention to the test before capacitor electric wave and nets and characteristics, such as large harmonics original, rectifiers, according to the severity of the harmonic and adopt corresponding measures to limit.
5.3.3安装场所不应受阳光直射，不被雨雪淋湿，避免法埃过多及剧烈振动场所，相互间距离应大于30mm；夏季环境温度较高时，应采用有效措施，以保证通风散热良好； 5.3.4安装前必须充分考虑电容器投入后，所引起的电压升高等因素，以防电容器在过电压下长期运行； 5.3.5在安装电容器前，必须注意检测电波形和网中和特性，如存在谐波原的影响，应按谐波的严重程度，采取相应的措施加以限制。
The resources are mainly the study is to use the oscilloscope observation of harmonic vibration related problems!
详细说明：本资源主要研究的是用示波器观察简谐振动的相关问题！
The simplest form of wave motion consists of the combination of a transverse simple harmonic vibration and a uniform translation.
波动的最简单形式是横向简谐振动和匀速直线运动的组合。
Crystal sinusoidal harmonic vibration in order to change the current form, this change is the current clock signal.
晶体的震动以正弦调和变化的电流的形式表现出来，这一变化的电流就是时钟信号。
The elastic modulus of inert element crystal and metal crystal with fcc structure depended on pressure in L-J and Morse interaction are obtained respectively. The influences of the atomic interaction potential and the atomic vibration non-simple harmonic effect on the solid elastic modulus are mainly discussed.
分别导出了L J和Morse相互作用势作用下面心立方结构的惰性元素晶体和金属晶体的弹性模量随压强的变化规律，讨论了原子相互作用势以及原子振动非简谐效应对固体弹性模量的影响。
It can resist the dynamic uncertainties and disturbing torque acted on the joint axis within definite bandwidth, improve the joint tracking performance, and resist the load vibration in the harmonic drive system.
为了抑制其振动，实现高精度轨迹跟踪控制，提出利用加速度传感器反馈控制来抑制负载端的振动、力矩干扰和动力学效应，提高其响应性能。
The vibration vision of the simple harmonic motion is a sine curve.
三，简谐运动的振动图象是正弦曲线。
Firstly, this paper researched the mechanism of tubing string vibration when natural gas flows in horizontal well tubing string. Secondly, established whole tubing string undamped and damped vibration system model according as reasonable assumption data of one horizontal well. Apply finite element analysis software to calculate tubing string natural characters, simple harmonic dynamic behavior of stable gas production and nonlinear dynamic behavior. Finally, this paper carried out the safety varied frequency of gas well and the method of vibration reduction.
本文首先从理论和数值模拟研究了天然气在水平井油管柱内的流动诱发油管柱振动的机理，然后在合理假设的基础上结合某水平井数据建立了全井段油管柱无阻尼和有阻尼振动系统模型，利用有限元软件计算分析了油管柱固有特性、稳产简谐动力学响应和非线性动力学响应，针对油管柱振动规律提出了天然气安全调节频率范围和减振措施。
Based on the vibration test in Yantan hydropower house, in this paper the author adopt LES method which belong to three dimensions unsteady turbulent flow numerical analysis to simulate vibration resource characteristics of hydrogenerator set, a harmonic vibration model of powerhouse substructure is put forward to carry out firstly a precise modal analysis and dynamic response analysis for generator floor. The numerical calculation results agree well with the surveyed data in situ.
本文结合岩滩水电站厂房振动的试验研究，采用非定常湍流数值分析的大涡模拟方法进行混流机组水力振动振源模拟；提出一种水电站厂房下部结构简谐振动模型，首次进行了发电机层楼板结构的精确模态分析和水力激振荷载下的动力响应分析，各项计算结果与实测数据吻合良好。
The vibration of rod is excited by input harmonic alternating current and the initial state of rod is at rest.
杆的初始状态是静止的，其振动是由交变电流激励而产生的。
The purpose of the dissertation is to study high performance vibratory roller by using chaotic vibration exciter with broad and spectrum instead of traditional harmonic exciter.
本文的目的是用具有宽频功率谱的混沌激振器代替传统的单频激振器，研究高效混沌振动压路机。
Under the small amplitude condition, the system becomes weak nonlinear system, it can be solved by harmonic balance method, the result show that the frequency is in respect to the amplitude of vibration and the value of prepressing.
在小振幅条件下，系统是弱非线性，可以利用谐波平衡法对系统进行定量分析，得出了系统频率与振幅、预紧量的关系。
The distribution of gear's contact stress, root stress, and contact engagement line in the engagement situation of gear pairs, were obtained on the base of explicit integration method. 3. Adopting the method of system matrix, the torsional vibration differential equation of general shafting was gained. The simple harmonic forms of excitation torque under the normal combustion or piston flameout of in-line engine and v-type engine were analysed. The decoupled algorithm of free vibration and forced vibration and the solution to the vibration damper's energy of resistance and the off-resonance calculation were studied. The sensitivity formulations of the natural frequency and vibration mode to physical parameters of system were derived by solving the eigenvalue problem. These sensitivity formulations provided the theoretical base for the dynamic modification of structure.
运用系统矩阵法建立了轴系的扭振微分方程，并对直列和V型发动机在正常发火和气缸熄火工况下的激振力矩进行了详细的简谐分析；基于精确方法推导了自由振动和强迫振动的解耦算法，给出了能量法计算中的减振器阻尼功求解和非共振计算方法；并研究了曲轴系扭振非线性分析中的变惯量问题，得到了单缸转动惯量的精确求解公式以及变惯量和固有频率的关系式；最后，从特征方程和振型正交性出发，推导了固有频率和振型对轴系转动惯量和刚度等物理参数的灵敏度，为扭振系统的结构动力学修改提供了理论基础。
According to the software engineering, developing a software for torsional vibration calculation of shafting, which is based on VB. net, and validating the correction of the model and the algorithm by comparing the results with the test one; 2 Researching on some key points of the torsional vibration, which are mainly including: how to calculate the harmonic coefficient by a newly method called Simulating the Indicated Diagram, one or more cylinder misfiring and load- unbalancing, systems with branches, non-linear problems, axial coupled torsional vibration, etc, and giving pieces of solutions for software design by a few examples; 3 The theory of FEM is also another important part.
对船舶推进轴系扭振计算中简谐系数计算、一缸熄火及气缸负荷不均衡、分支系统尤其是双机并车轴系、非线性问题、纵扭耦合计算等关键技术问题进行了研究，对各因素对扭振计算的影响，结合所开发的扭振计算软件，给出了相应情况在实际计算中的处理方法，并列举了一部分计算实例。
The forced vibration of the electromechanical coupled double micro beam under harmonic excitation is investigated further.
进一步研究了机电耦合双微梁在简谐激励作用下的受迫振动规律。