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air pressure fluctuation
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  “air pressure fluctuation”译为未确定词的双语例句
     Analysis & Courtermeasures of Boiler Air Pressure Fluctuation
     锅炉风压波动问题的分析与处理
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     When the angle of attack is less than 25°and the flow is laminal,the aerodynamical forces,acting on the jet model, can be expressed analytically by some definite components, such as: aeroelastical forces, aerodamping force, the air pressure fluctuation, and the vortex-induced force.
     文章中讨论了在系统的气动阻尼、气动刚度、风力脉动以及卡门涡街效应等因素的影响下,当攻角(以及偏航角)较小(小于25°)时,作用于系统上广义力的形式。
短句来源
     Based on the statistics during 1972~1981, the seiche processes with an amplitude greater than 40cm occured six times a year on an average. On September 1, 1980, a seiche with a maximum amplitude of 293cm was observed,and a 7 hPa air pressure fluctuation was also observed on the same day.
     据统计 ,1 972~ 1 981年 ,平均每年出现 6次>40 cm的振动 ,其中 ,1 980年 9月 1日观测到水位振动的最大振幅达 2 93cm,同日的气压波也有 7h Pa的起伏。
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  相似匹配句对
     Fault shooting of pressure fluctuation of quench air
     LTG空调系统侧吹风风压波动的原因及对策
短句来源
     Analysis & Courtermeasures of Boiler Air Pressure Fluctuation
     锅炉风压波动问题的分析与处理
短句来源
     Structurevibration and pressure fluctuation;
     动水压力脉动及建筑物的振动;
短句来源
     Pressure fluctuation for air-water two-phase flow
     气液两相流压力波动特性
短句来源
     The Study of Pressure Fluctuation and Gas Motion In the Engine Air-in Pipe
     发动机进气管中压力波动和气体运动的研究
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  air pressure fluctuation
When approaching the length of 100 m, even air pressure fluctuation may change the delay 100 ps.
      
The second aim is to provide correlations to obtain chamber air pressure fluctuation from hole diameter and physical properties of fluid.
      


In this paper we study the dynamical responses for a tail-support system with definite parameters in a wind tunnel. When the angle of attack is less than 25°and the flow is laminal,the aerodynamical forces,acting on the jet model, can be expressed analytically by some definite components, such as: aeroelastical forces, aerodamping force, the air pressure fluctuation, and the vortex-induced force. The equation of motion for the tail-support system with viscous damping and derodynamical excitation can be...

In this paper we study the dynamical responses for a tail-support system with definite parameters in a wind tunnel. When the angle of attack is less than 25°and the flow is laminal,the aerodynamical forces,acting on the jet model, can be expressed analytically by some definite components, such as: aeroelastical forces, aerodamping force, the air pressure fluctuation, and the vortex-induced force. The equation of motion for the tail-support system with viscous damping and derodynamical excitation can be presented in the matrix form, and finally we solved this equation numerically on the digital computer by Wilson-0 method.

本文是研究尾撑系统在做吹风实验时系统的动力响应问题。文章中讨论了在系统的气动阻尼、气动刚度、风力脉动以及卡门涡街效应等因素的影响下,当攻角(以及偏航角)较小(小于25°)时,作用于系统上广义力的形式。然后应用有限元素法建立系统结构的振动方程。最后应用Wilson-θ法对系统的结构振动方程进行数值求解。

The LAGFD-Ⅱ regional numerical wave model is presented based on the wave- number energy spectrum balance equation. The complicated characteristics equations describing the effect of unsteady depth and back-ground current on the wave propagation in the wave number space have been derived in detail. Various source functions, an energy input source function due to the forcing of air pressure fluctuation, an energy dissipation function caused by wave breaking and bottom friction effect in shallow water, a...

The LAGFD-Ⅱ regional numerical wave model is presented based on the wave- number energy spectrum balance equation. The complicated characteristics equations describing the effect of unsteady depth and back-ground current on the wave propagation in the wave number space have been derived in detail. Various source functions, an energy input source function due to the forcing of air pressure fluctuation, an energy dissipation function caused by wave breaking and bottom friction effect in shallow water, a simplified energy redistribution function borne by wave-wave weak interaction and a wave-current interaction function producted by wave momentum flux tensor and deformation tensor of ambient current are discussed in the model. The model's numerical results are very satisfactory.

给出了LAGFD-Ⅱ区域性海浪数值模式,详细地导出了波数空间中的复杂特征线方程。在模式中除了含有一般的各项源函数项之外,我们还给出了波、流相互作用源函数,并对非线性相互作用源函数作了一种简化处理,模式的数值计算取得了令人满意的结果。

Longkou Bay is one of the bays where the seiches occure frequently. Based on the statistics during 1972~1981, the seiche processes with an amplitude greater than 40cm occured six times a year on an average. On September 1, 1980, a seiche with a maximum amplitude of 293cm was observed,and a 7 hPa air pressure fluctuation was also observed on the same day. By using numerical modelling method the quantitative relationship between the seiche and the air pressure fluetuation in Longkou Bay on...

Longkou Bay is one of the bays where the seiches occure frequently. Based on the statistics during 1972~1981, the seiche processes with an amplitude greater than 40cm occured six times a year on an average. On September 1, 1980, a seiche with a maximum amplitude of 293cm was observed,and a 7 hPa air pressure fluctuation was also observed on the same day. By using numerical modelling method the quantitative relationship between the seiche and the air pressure fluetuation in Longkou Bay on September 1, 1980 is studied. The results indicate that the ocean long wave caused by a moving air pressure fluctuation and travelling into the bay can cause seiches of large amplitude by resonance and it is unlikely for air pressure fluctuation to directly cause seiche of large amplitude in a bay.

龙口湾是出现假潮比较显著的海湾之一。据统计 ,1 972~ 1 981年 ,平均每年出现 6次>40 cm的振动 ,其中 ,1 980年 9月 1日观测到水位振动的最大振幅达 2 93cm,同日的气压波也有 7h Pa的起伏。用数值模拟方法 ,初步探讨了气压扰动与 1 980年 9月 1日在龙口湾观测到的假潮之间的定量关系 ,证实 ,在龙口湾中出现的大振幅假潮的确是由于移动气压波扰动激起湾外长波传入湾内发生共振所引起的。直接由气压波扰动很难引起大振幅假潮的发生

 
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