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vibrations
相关语句
  振动
     Study on the Torsional Vibrations of Foundations Resting on Saturated Grounds
     饱和地基上基础的扭转振动特性研究
短句来源
     Study on the Rocking Vibrations of Foundations Resting on Saturated Grounds
     饱和地基上基础的摇摆振动特性研究
短句来源
     Dynamical Analysis of Transverse Vibrations of Axially Moving Viscoelastic Beams
     轴向运动粘弹性梁的横向振动分析
短句来源
     Research on Vibrations of Cyclindrical Roller Bearings Based on Contact Mechanics
     基于接触力学的圆柱滚子轴承振动研究
短句来源
     Analysis of Pipe Vibrations
     管道的振动
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  振动的
     Resonant Two-photon Ionization Spectra of the Intermolecular Vibrations in p-C_6H_4F_2…NH_3 Complex
     复合物p-C_6H_4F_2…NH_3(ND_3)外部振动的共振双光子电离光谱
短句来源
     Resonant Two-Photon Ionization Spectra of External Vibrations of the van der Waals Complex p C_6H_4FCH_3...Ar
     范德瓦尔斯分子p-C_6H_4FCH_3...Ar外部振动的共振双光子电离光谱
短句来源
     The vibration coupling between the M—N stretching and the porphyrin ring deformation vibrations appeared at ~250 cm -1 . Metal sensitive bands were found at ~1 354 cm -1 , ~1 019 cm -1 , ~991 cm -1 , ~791 cm -1 , ~737 cm -1 , ~633 cm -1 and 236 cm -1 .
     ~ 2 50 cm- 1处的吸收谱带是 M— N键伸缩振动和卟啉环变形振动的复合振动 ,~ 32 7cm- 1处的吸收谱带是 M—Cl键的伸缩振动 ,金属敏感带出现在~ 1 354cm- 1,~ 1 0 1 9cm- 1,~ 991 cm- 1,~ 791 cm- 1,~ 737cm- 1,~ 633cm- 1和~ 2 36cm- 1处 .
短句来源
     H_∞ control of nonlinear simply supported beam vibrations
     非线性简支梁振动的H_∞控制
短句来源
     CORRELATION ANALYSIS OF ZrO_2 LATTICE VIBRATIONS AND THE ZY SYSTEM RAMAN SPECTRA
     ZrO_2晶格振动的相关分析和ZY系统的拉曼光谱
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  “vibrations”译为未确定词的双语例句
     Raman Spectra of Laser Crystals NAB and NYAB and the Ligand Vibrations of Their Active Ions
     Raman Spectra of Laser Crystals NAB and NYAB and the Ligand Vibrations of Their Active Ions
短句来源
     Skeleton Vibrations and Force Constants of [Fe_2Cr(μ_3-O) (glycine)_6 (H_2O)_3](NO_3)_7 . 3H_2O
     Skeleton Vibrations and Force Constants of [Fe_2Cr(μ_3-O)(glycine)_6(H_2O)_3](NO_3)_7.3H_2O
短句来源
     Stability Analysis of Nonlinear Vibrations of a Deploying Flexible Beam
     Stability Analysis of Nonlinear Vibrations of a Deploying Flexible Beam
短句来源
     Dynamical Calculation of Vibrations of Crystalline C_2H_2
     正交相C_2H_2晶体振动光谱的计算
短句来源
     THE SYMMETRY PROPERTIES OF THE NORMAL VIBRATIONS OF C-15 TYPE SUPERCONDUCTOR HfV_2
     C-15型超导体HfV_2简正振动的对称性质
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  vibrations
The CH2 segments are in a mobile state because of the enhanced stretching and twisting vibrations of the C-CO and C-N bonds.
      
In this paper, vibration utilization is classified into linear or nonlinear vibrations, waves, and electric-magnetic oscillations.
      
Environmental problems of vibrations induced by railway traffic
      
In this paper, a general review is made on the problems of vibrations of the ground and nearby buildings induced by railway traffic, and on the researches on this subject in theoretical analyses, numerical simulations, and field experiments.
      
The characteristics of ground vibrations induced by railway traffic and their propagation, from the aspects of duration, intensity distribution, vehicle load and speed, are summarized.
      
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The assignment of the fundamental frequencies of C4H2 given by Timm and Mecke is discussed and a new assignment in accord with the selection rules is suggested. Nine force constants for the molecule are calculated according to Timm and Mecke's assignment, while the new assignment gives no reasonable constants for the deformation vibrations. Further study of the Raman spectrum and the infrared absorption is necessary for a final classification of the deformation frequencies.

按Timm Mecke之C_4H_2基本振动率,吾人求得一含有九个常动之势能式中各常数之值。

This paper reviews the observational facts and theories on the airflow over small mountains. Special emphasis is laid to point out and discuss the controversies in the theory of lee waves among different writers. According to present author controversiesare due to (1) the difference in scale of the mountain and (2) the choice of the upper boundary condition. When l is comparable to the critical value , where l is the half-width of the mountain, lee waves occur. When there is an upper solid lid or a discontinuity...

This paper reviews the observational facts and theories on the airflow over small mountains. Special emphasis is laid to point out and discuss the controversies in the theory of lee waves among different writers. According to present author controversiesare due to (1) the difference in scale of the mountain and (2) the choice of the upper boundary condition. When l is comparable to the critical value , where l is the half-width of the mountain, lee waves occur. When there is an upper solid lid or a discontinuity in the atmosphere lee waves occur.In the first case the forced vibration is in resonance with natural vibration. In the second case there can exist only vibrations of certain wave lengths, which appears as those of the lee wave. The physics of lee waves is thus clear.

本文总结了小地形对于气流的影响。文中着重地指出和讨论了过去背风波理论中的矛盾。作者认为这些矛盾是由于山的大小选择和上界边界条件的选择而引起的。当山的宽度的一半l≈(L_S/2π)时(L_S=u/(g/θ αθ/αz)(1/2)),和当大气中有一个固定的盖或不连续面存在时,背风波出现。 在第一种情况下,山的强迫振动与大气中的自由振动共鸣;在第二种情况下,只具有某些滤长的振动可以存在,这波长就是背风波的波长。这样的讨论背风波的物理意义就清楚了。

The problem of investigating the vibration properties of continuous girders on elastic piers frequently occurs in practical design work. An approximate method of attack is to replace the elastic pier by a spring support. This method simplifies greatly the analysis and is generally adopted in practice. In the first part of this paper, this approximate method is investigated in detail and complete solutions including the effect of initial conditions are given. The computations are made more systematic and simple...

The problem of investigating the vibration properties of continuous girders on elastic piers frequently occurs in practical design work. An approximate method of attack is to replace the elastic pier by a spring support. This method simplifies greatly the analysis and is generally adopted in practice. In the first part of this paper, this approximate method is investigated in detail and complete solutions including the effect of initial conditions are given. The computations are made more systematic and simple by the adoption of a system of constants defined as the dynamic shape constants and load constants of the structure. In the second part of this paper, the more accurate method of analysis is investigated. The exact frequency equations of the system are obtained by writing down the dynamic equations of the girders and the piers simultaneously and the boundary conditions are taken into consideration. It is shown that by taking only the fist one or two terms of the series expansions, the exact frequency equation reduces to the approximate one. It is concluded that the approximate method will give adequate solutions in the case when the piers are rigid and when only the lower frequencies of the natural mode need be considered. Particular solutions of structures under transverse vibrations are worked out and is found more involved than that given by the approximate method.

本文所謂架空結構是指搁置在較高的支墩上的連續梁結構,例如高架橋梁或水電站的架空輸水管道等。這類結構在承受震動荷載(例如地震)時,常會引起較大的變形和应力。如支墩較粗矮,則在計算較低的頻率時,其作用可近似的以一彈簧支座代替之,而忽略支墩本身的結構震動影響。這是一個常用的假定,可以使計算工作充分簡化。本文首先對這一情况作了詳盡討論,給出较完整的解答,包括起始條件影響在内,並提出用“載常數”及“形常數”的觀念來進行計算。然后本文給出考虑支墩的震動影響時的精確解答,分別就縱横方向的震動進行討論,並指出近似計算公式和精確公式间的關係,近似公式只能在支墩較剛固和計算较低階的頻率時才適用。文中列出了結構作横向諧和震動時的特別解答,可見其計算工作量將比近似法增加不少。

 
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