查询词典 mode of vibration

In order to optimizing the vibration isolation of some diesel generator set ,an analysis of the vibration character and excitation forces of it is presented through theory study and vibration testing.

通过对频响函数的测试，获得了某型柴油发电机组隔振系统各阶刚体模态频率和弹性模态频率，分析了该机组振源和振动特点。

Select suitable equipment of vibration seperation and vibration reduction, which can reduce the noise made by vibration of gear box and generator efficaciously.

选择合适的隔振减振装置，有效地降低了齿轮箱和发电机由于振动而产生的噪音。

Accordingly, the vibration theory, vibration sources and the part vibration fault features of turbine generator units are analysed, sorted out and finalized so as to lay a solid foundation for the establishment of fault diagnosis expert knowledge bank.

本文首先论述了水轮发电机组故障诊断的重要意义，详细分析了故障诊断的研究现状及发展趋势，并对故障诊断的应用前景做了进一步分析。

Results①In non-vibration group, the peak of temperature appeared at operation 3min; in vibration group,the temperature were increasing gradually as the peak appeared at evacuating 3min .②vibration group had better significant and persistent calorigenic effect than non-vibration group. ConclusionVibration massage apparatus has the validity of heightening temperature.

结果①不同测量时间对受试者局部温度有影响（P.05），空置组中温度升高在空置3 min后即刻尤为明显，尔后温度呈逐渐下降趋势，而振动组中随着时间的增加，背部温度不断升高，在振动后撤离仪器3 min达到峰值；②空置组和振动组都能使局部皮肤温度有不同程度的升高，但振动组比空置组产热效应更显著，而且更为持久。

Lowest fixed frequency 2.0Hz,endwise and crosswise rate of damp respectively are 0.1~0.15,applying to passive vibration of precise apparatus and motor、compressor etc. With high vibration requirement and high resonance requirement in crosswise to do the active vibration.

型：最低固有频率2.0Hz，竖向和水平向阻尼比均为0.1~0.15，适用于精密仪器设备的被动隔振和发动机、压缩机等隔振要求较高、且对水平向抑制通过共振要求较严的设备作主动隔振

In the intersatellite coherent optical communication, the vibration of a satellite will lead to a pointing error of transmitting and receiving antennas, which will decrease the signal-to-noise ratio and increase the bit error rate. In this paper, the Rayleigh distribution is taken as the pointing error model caused by satellite vibration, and PSK homodyne communication scheme is used as an example to analyze the influence of the satellite vibration on the system instantaneous BER and average BER. The simulation calculation result of BER is given.

针对星间相干激光通信中卫星平台的振动造成发射天线和接收天线的瞄准角误差，使系统信号信噪比下降，误码率增加，该文以瑞利分布作为振动造成的瞄准角误差模型，结合高斯本振光和艾里信号光外差检测模型，以PSK零差通信体制为例分析卫星振动对系统的瞬时误码率和平均误码率的影响，给出误码率仿真计算结果。

The analysis indicated that the vibration isolation system under the action of initiative control possesses controllable rigidity and damping characteristics; at the same time by comparing with other electromagnetic structure it was a kind of vibration isolation system with very small vibration isolative power consumption.

分析表明，主动控制作用下的隔振系统具有可控的刚度和阻尼特性，同时与其他电磁结构比较，其是一种隔振功耗很小的隔振系统。

In 1966, Ross solved the equation of symmetrical free vibration and got six matching solution, but he believed that it is impossible to find a solution which is useful in everywhere. In 1979, Goldenveizer printed a monography in which the uniformly valid representations of curved solution were published, but the representations of membrane solution were still not found. In 1988, Ruo-jing Zhang published the uniformly valid representation of six solutions for symmetrical free vibration and eight solutions for dissymmetrical free vibration for the first time.

但却碰到巨大困难。1966年，Ross给出了轴对称振动的6个匹配解，但却认为不可能求出全域一致有效解。1979年，Gol&denveizer等出版专著，给出了弯曲解的全域一致有效表达式，但仍然没有得到6个解中奇异薄膜解的全域一致有效表达式。1988年，张若京在其博士论文中第一次给出了轴对称6个解和非轴对称8个解的全部&全域一致有效表达式。

Splitting of the nondegenerate symmetric deformation vibration is also interpreted by a vibration-vibration coupling mechanism which agrees well with the measured energy difference.

关联场理论计算结果给出分裂双峰的能量间距为19cm〓，与实验结果的27cm〓很好地吻和。

After referencing the specification of the national standard GB/ T11648-89, according to the petroleum industry condition, the torsional vibration, pendular vibration, exciting force self-synchronizing and stability of synchronizing,the stability of vibrate synch ronous transmission of two and more long vibration motors are tested. All of above testing parameters will replenish the blank of both product development and quality test measure of this type of motors both here and abroad.

参阅国家标准GB／T11648-89的技术要求，并针对石油现场的实际条件，本课题对两台和多台隔爆长形振动电机的扭振、摆振、激振力大小，自同步性和同步状态稳定性，振动同步传动稳定性等技术参数进行了模拟动态测试，而这些新增设技术参数的测试均是填补国内外此种新型电机产品研制开发和质量检验测试的技术空白。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。