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the first mode
相关语句
  第一振型
     The paper also studied on control of the vibration of the first mode by means of tuned mass damper (TMD) and increase of the system damping and decrease of the system vibration by means of multiple viscoelastic dampers (VED).
     研究采用调频质量阻尼器 (TMD)以控制塔架第一振型振动 ,采用多个粘弹性阻尼器 (VED)用于增大塔线体系阻尼 ,减小塔线体系振动。
短句来源
     Furthermore, control of the first mode of the soil structure system is realized by choosing the parameter of TMD.
     进而选择确定的TMD参数 ,控制相互作用体系的第一振型
短句来源
     According to the regulation for Technical specification for concrete structure of tall building, the seismic overturn moment that is bore by the core tube and common shear walls should not less than half of general bottom overturn moment of structure under the first mode.
     按我国高层建筑混凝土结构技术规程的要求,在抗震设计时,筒体和一般剪力墙承受的第一振型底部地震倾覆力矩不宜小于结构总底部地震倾覆力矩的50%。
短句来源
     The results show that the vibration characteristics of the tower in two horizontal directions are slightly distinct,and the damping ratio of the first mode is greater than that of the second mode.
     本文分析结果表明,在两水平方向上木塔的振动特性存在些微差异,第一振型阻尼比较第二振型阻尼比大。
短句来源
     The results may be helpful to understanding and application of Capacity Spectrum Method in ChinaCapacity Spectrum Method is generally suitable to the structures whose dynamic response is dominated by by the first mode.
     能力谱方法适用于结构动力响应主要由第一振型控制的结构抗震分析。
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  “the first mode”译为未确定词的双语例句
     the first mode frequency of the switch is 500Hz.
     测到第一模态频率是500Hz。
短句来源
     the first mode is the philosophical studying of culture.
     2哲学的文化研究这是文化哲学研究的第二阶段,也是文化哲学由浅入深的第二个层面,可谓文化哲学的第二形态。
短句来源
     The vibration attenuation mechanism was expounded. The influence of different damping layer shear modulus and magnetic stiffness on the loss factor of beam for the first mode by MCLD treatment was evaluated.
     分析了不同阻尼层设置方式下 ,磁约束阻尼处理对系统一阶模态损耗因子的影响 ,阐明了磁约束的减振机理 ,分析了阻尼层剪切模量和磁刚度对磁约束处理减振效果的影响 .
短句来源
     The observed period for the fundamental mode of Eayleigh waves ranging from 0.5 to 56.0 seconds. The standard deviations of the observed velocities are 0.08-0.15 km/sec. For the first mode, the periods are from 10 to 16 seconds, with the standard deviation of velocity determinations 0.05-0.13 km/sec.
     所得基阶瑞利波的观测周期为5.0—56.0秒,速度标准偏差为0.08—0.15公里/秒,一阶瑞利波的观测周期范围为10—16秒,速度标准偏差为0.05—0.13公里/秒。
短句来源
     Conclusions The effect of PRVC on respiratory failure of AECOPD patients was not better than that of VC(A/C),so this applying PRVC as the first mode of mechanical ventilation should be careful.
     结论在AECOPD患者呼吸衰竭施行机械通气治疗时初始采用PRVC模式的疗效不及VC(A/C)模式,故初始采用PRVC模式治疗应慎重。
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  相似匹配句对
     The First
     第一次
短句来源
     First,the G.
     文章首先介绍了G.
短句来源
     First, with M.D.
     D.
短句来源
     First,M.
     首先,对M.
短句来源
     Parking mode;
     停车场设计模式;
短句来源
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  the first mode
It has been shown that the middle regime is unstable, only the first mode of the small disturbances being unstable over a broad range of the parameters.
      
In the first mode, which is realized at rather substantial differences between the initial temperature of the reservoir and the temperature of water being injected, the condensation of steam occurs at the interface.
      
In the first mode, input processes are digitized after a START signal; in the second mode, a signal exceeding a preset threshold is uninterruptedly sought for and recorded.
      
These velocity deviations have been determined for the first mode of Love waves and for the zero mode of SH waves as functions of the thickness and acoustic properties of the coating and substrate.
      
It is shown that the frequency band of the received signal can be broadened by introducing a frequency-time correction of the propagation time of the first mode as a function of the sound frequency.
      
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The propagation experiment of explosive sounds in the isothermal layer below the thermoeline was made, the record of individual modes for frequencies 0.32-1.0 kHz was obtained. By analyzing the travel time of mode pulse, it was determined that the oscillographic recording was the first mode. On the basis of analyzing the propagation properties of the first mode, the bottom-reflection coefficients at small grazing angle for frequencies 0.32-1.0 kHz were obtained.

在跃变层之下的等温层中进行了爆炸声传播实验,获得了频率0.32—1.0kH2的单个简正波的记录。通过对简正波脉冲传播时间的分析,确定所记录的波形为第一号简正波。根据第一号简正波的传播特性,分析得到了频率0.32—1.0千赫的小掠射角海底反射系数。

The group velocity dispersion curves of Bayleigh waves through most of the Qing-hai-Xizang Plateau are obtained, using the single-station and multiple-filtering process. The observed period for the fundamental mode of Eayleigh waves ranging from 0.5 to 56.0 seconds. The standard deviations of the observed velocities are 0.08-0.15 km/sec. For the first mode, the periods are from 10 to 16 seconds, with the standard deviation of velocity determinations 0.05-0.13 km/sec. By means of generalized linear inversion...

The group velocity dispersion curves of Bayleigh waves through most of the Qing-hai-Xizang Plateau are obtained, using the single-station and multiple-filtering process. The observed period for the fundamental mode of Eayleigh waves ranging from 0.5 to 56.0 seconds. The standard deviations of the observed velocities are 0.08-0.15 km/sec. For the first mode, the periods are from 10 to 16 seconds, with the standard deviation of velocity determinations 0.05-0.13 km/sec. By means of generalized linear inversion of the dispersion curves, we obtained a five-layer crust model with a low-velocity layer at a depth between 27 to 40 km. The transverse wave velocity for the low velocity zone is 3.29 km/sec, and lower by 0.21 km/sec than that in the zone above.

本文用单台多重滤波方法测定了经过青藏高原地区瑞利波群速度频散曲线。所得基阶瑞利波的观测周期为5.0—56.0秒,速度标准偏差为0.08—0.15公里/秒,一阶瑞利波的观测周期范围为10—16秒,速度标准偏差为0.05—0.13公里/秒。利用广义线性反演方法对频散曲线进行反演,可得出一个由五层构成的地震横波速度地壳模型。在27—40公里之间存在低速层,其横波速度为3.29公里/秒,比上一层低0.21公里/秒。

Torsional fatigue failures are the peculiar troubles in reciprocating engine drives. In recent years this kind of problems also occured in many marine diesel installations in our country. This paper gives a brief description to the problems on torsional fatigue failures as well as to the main reason of these problems, and this paper also intends to present some methods for eliminating the failures.As to torsional fatigue failures, the first mode of motion is most frequent. In general, shifting method should...

Torsional fatigue failures are the peculiar troubles in reciprocating engine drives. In recent years this kind of problems also occured in many marine diesel installations in our country. This paper gives a brief description to the problems on torsional fatigue failures as well as to the main reason of these problems, and this paper also intends to present some methods for eliminating the failures.As to torsional fatigue failures, the first mode of motion is most frequent. In general, shifting method should be used to prevent this failure. Changes in the elasticity of the shaft line or in the inertia of diesel flywheel can be made so as to remove the running speed sufficiently apart from important critical speed of first mode. The Second mode is also occured frepuently, a damper is usually msed to avoid it. If both aft and forward ends of the engine were used to deliver power or the shaft line is of long-shaft arrangement, the torsional fatigue failures of the third mode will be occurring, and care must be taken to it. Moreover, this paper also gives abrief discussion on other forms of torsional casualties, such as transmission gear beat, damper failure, camshaft break, etc.At last, this paper expounds several key links to which attention should be paid during the design, experiment and trial voyage stages of marine installations.

扭振疲劳事故是往复式发动机动力装置特有的故障。近年来,我国一些船舶柴油机动力装置曾多次发生扭振事故。本文对这些故障情况及其发生原因作了简要介绍,並结合实例对消除故障的方法进行了深入的讨论。在扭振疲劳事故中,以单节扭振故障最为常见。通常采用调频法消除,可改变轴系柔度或柴油机飞轮惯量以使单节主临界转速远离常用转速。双节扭振故障也较常见,通常可加装减振器以消除之。如柴油机前后端同时输出功率,或轴系较长时,有可能产生三节扭振故障,也必须予以注意。此外,本文对扭振故障的其它形式,如传动齿轮敲击、减振器损坏、凸轮轴断裂等进行了简要分析。最后,本文阐述了为使柴油机动力装置具有良好的扭振特性,在其设计、试验和实船试航各阶段必须注意的几个环节。

 
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