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propeller aircraft
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  螺旋桨飞机
     The influence of propeller aircraft on the JEM signatures and the related radar limitations were analyzed using an ideal JEM model of the propeller aircraft. The model was validated by analyzing JEM signatures of actual radar signals.
     在理想螺旋桨飞机JEM模型的基础上,讨论了实际螺旋桨飞机结构和飞行姿态对JEM特征的影响和防空雷达有关参数对JEM特征的限制,并用实际螺旋桨飞机和防空雷达参数对该模型进行了仿真分析,再通过分析不同飞行姿态螺旋桨飞机实际回波的JEM特征验证了该模型。
短句来源
     The result shows that the traditional estimation methods about powerplant performance are adapted for propeller aircraft even if with small sized piston engine and propeller.
     研究结果表明,传统的估算方法对于装小型活塞式发动机的螺旋桨飞机也是适用的。
短句来源
     The algorithm was applied to calculate whirl flutter foracertain type propeller aircraft and the influences of elastic wing were mainly examined.
     应用本算法对某型螺旋桨飞机的旋转颤振进行了计算,并主要考察了弹性机翼的影响。
短句来源
     Calculation of Range and Endurance of a Propeller Aircraft at Constant Altitude
     螺旋桨飞机等高度飞行的航程与航时计算
短句来源
     The powerplant of propeller aircraft is composed of two main parts, piston engine and propeller.
     小型螺旋桨飞机的动力装置一般由活塞式发动机和螺旋桨两个主要部分组成。
短句来源
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  螺桨飞机
     VALIDATION TESTS WITH A SCALE-MODEL FOR SURFACE SOUND PRESSURE PREDICTION OF PROPELLER AIRCRAFT
     螺桨飞机缩比模型表面声压预测的验证试验
短句来源
     Experimental Investigation on Noise Propagation of Scale Cabin Model for Propeller Aircraft
     螺桨飞机缩比座舱模型噪声传播的试验研究
短句来源
     An experiment using active control technique to attenuate propeller aircraft cabin noise is presented in this paper.
     文章讨论主动噪声控制技术在螺桨飞机舱内降噪中的应用。
短句来源
  “propeller aircraft”译为未确定词的双语例句
     Vibration Model Analysis of Propeller Aircraft Cabin
     螺桨飞机座舱模型振动模态分析
短句来源
     The reduction of interior noise of propeller aircraft has been a main problem which is cared by acousticians.
     利用一块飞机壁板讨论有源消声技术降低飞机舱内噪声。
短句来源
     This paper analyses vibration Modal of Propeller Aircraft Cabin Model and Plot structural Vibration shape diagram using finite element method of dynamic analysis for linera strc-ture.
     本文使用线性结构动力分析的有限元法,对某型螺桨飞机座舱模型振动模态作了全面分析,并绘制了前几阶振频下结构的振型图。
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  propeller aircraft
The sound transmission through the trim cavity in a propeller aircraft is most important in the area around the propeller plane.
      
The airport operations for 1995 was estimated at 3,346 for single-engine and light, twin-engine propeller aircraft.
      
Models for evaluating the performance of propeller aircraft active noise control systems.
      
Low frequency cabin noise and vibration in military propeller aircraft is dominated by the blade-pass frequency and its low-order harmonics.
      
An investigation into active synchrophasing for cabin noise and vibration reduction in propeller aircraft.
      
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The reduction of interior noise of propeller aircraft has been a main problem which is cared by acousticians.The methods for noise control which are generally adopted are absorp-tion,damping,insulation,etc. But the effects of reduction for low frequency noise are not sat-isfying because the properties of the material become worse at low frequency.Recently the technique of active sound control is considered to be an effective manner to controI the low fre-quency noise,especially the interior noise of propeller...

The reduction of interior noise of propeller aircraft has been a main problem which is cared by acousticians.The methods for noise control which are generally adopted are absorp-tion,damping,insulation,etc. But the effects of reduction for low frequency noise are not sat-isfying because the properties of the material become worse at low frequency.Recently the technique of active sound control is considered to be an effective manner to controI the low fre-quency noise,especially the interior noise of propeller aircraft. Thismper first,theoretically,discusses the possibility for active control of sound radiation from an airplane panel,them intro-duces an adaptive active control system and last experimental results on active control of sound radiatio and sound transmission through panel are presented.The results are encouraging.

利用一块飞机壁板讨论有源消声技术降低飞机舱内噪声。首先从理论上说明了利用有源消声抵消壁板辐射声的可行性;介绍了可用于工程的自适应有源消声器;最后在实验室对振动激励的壁板输射声、声激励时壁板的透射声进行了消声实验,取得了良好的效果。

By introducing structural dampings and performing very ingenious derivations and mathematical cal-culations to the undamped dynamic equations in our earlier paper[1], the original system equations were changed in-to a generalized complex eigenvalue problem convenient to solve. Then,a specially effective bi-iterative algorithmwas first put forward to find the solutions to the problem. The algorithm was applied to calculate whirl flutter foracertain type propeller aircraft and the influences of elastic wing...

By introducing structural dampings and performing very ingenious derivations and mathematical cal-culations to the undamped dynamic equations in our earlier paper[1], the original system equations were changed in-to a generalized complex eigenvalue problem convenient to solve. Then,a specially effective bi-iterative algorithmwas first put forward to find the solutions to the problem. The algorithm was applied to calculate whirl flutter foracertain type propeller aircraft and the influences of elastic wing were mainly examined.Results have shown ouralgorithm is reasonable and reliable and extremely effective to analyse the dynamic strength and whirl flutter of system.

在文献[1]所建立的系统不含阻尼的运动方程的基础上,引入结构阻尼,经过巧妙的推导和演算,将原系统方程变换成一个便于求解的广义复特征值问题。接着,我们首次提出了一种非常有效的双迭代算法对问题进行求解。应用本算法对某型螺旋桨飞机的旋转颤振进行了计算,并主要考察了弹性机翼的影响。结果表明,本文算法合理可靠,对分析系统的强度及颤振问题极其有效。

This paper analyses vibration Modal of Propeller Aircraft Cabin Model and Plot structural Vibration shape diagram using finite element method of dynamic analysis for linera strc-ture. This is also an important basis to establish transmission Mode of Propeller noise to cabin.

本文使用线性结构动力分析的有限元法,对某型螺桨飞机座舱模型振动模态作了全面分析,并绘制了前几阶振频下结构的振型图。这也是建立螺桨噪声向舱内传播模型的重要依据。

 
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