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辐射问题    
相关语句
  radiation problems
    WAVE SUPERPOSITION METHOD BASED ON VIRTUAL SOURCE BOUNDARY WITH COMPLEX RADIUS VECTOR FOR SOLVING ACOUSTIC RADIATION PROBLEMS
    基于复数矢径的波叠加法解声辐射问题
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  radiation problem
The apparent mass and damping coefficients of the radiation problem and the reflection coefficient of the problem of scattering of an impinging wave by a floating body are calculated.
      
This paper inquires into the feasibility of the solution to the wave diffraction and radiation problem in the case of critical loading.
      
It is shown that the diffraction problem always has a solution while the radiation problem may have no solution.
      
Inverse radiation problem of boundary incident radiation heat flux in semitransparent planar slab with semitransparent boundarie
      
Inverse radiation problem in one-dimensional semitransparent plane-parallel media
      
更多          
  radiation problems
It is thus concluded that scattering problems can be transformed into specific radiation problems where the radiated source of known distribution is located at infinity.
      
A frequency extrapolation technique for computing antenna-platform radiation problems
      
A frequency extrapolation technique is proposed to obtain the broad band radiation patterns of antenna-platform radiation problems.
      
The algorithm is applied to several 2D and 3D antenna-platform radiation problems.
      
By applying the radiation-to-scattering transform, the scattering problem can be considered as the specific radiation problems where the radiated source equivalent to the electromagnetic plane wave is located at infinity.
      
更多          
  radiation problem
The apparent mass and damping coefficients of the radiation problem and the reflection coefficient of the problem of scattering of an impinging wave by a floating body are calculated.
      
This paper inquires into the feasibility of the solution to the wave diffraction and radiation problem in the case of critical loading.
      
It is shown that the diffraction problem always has a solution while the radiation problem may have no solution.
      
Inverse radiation problem of boundary incident radiation heat flux in semitransparent planar slab with semitransparent boundarie
      
Inverse radiation problem in one-dimensional semitransparent plane-parallel media
      
更多          


The numerical method of coupled boundary integral equation and finite element has been used to compute the forces of wave diffraction and radiation on large two dimensional objects. Result consist of the drifting forces, added mass and damping coefficients for rectangular and circular bodies floading, submerged or anchored to the sea bottom. Discussion of the method and results has been given in detail. Because of its economy and accuracy, the method can be used successfully in many related problems where the...

The numerical method of coupled boundary integral equation and finite element has been used to compute the forces of wave diffraction and radiation on large two dimensional objects. Result consist of the drifting forces, added mass and damping coefficients for rectangular and circular bodies floading, submerged or anchored to the sea bottom. Discussion of the method and results has been given in detail. Because of its economy and accuracy, the method can be used successfully in many related problems where the domain of solution is infinite. The method can also be applied to three dimensional problems.

本文中采用边界积分方程和有限元耦合的数值方法,计算了二维波浪绕射和辐射问题。给出圆形和长方形浮体、潜体在波场中的水动力系数和所受的波浪力,并详细讨论了计算方法。耦合元方法是近年提出的,用于无限区域中波浪的绕射和辐射问题时单元少,计算方便,经济可行,在海洋工程和波能利用的计算流体中有一定的推广意义。该方法也可用于三维问题。

This paper presents a boundary element method for coupled motion analysis of fluid and solid. The numerical procedure includes the analysis of diffraction problem, radiation problem and the coupled motion problem of a floating body in/on the sea. Numerical results of diffraction problem and coupled motion problem are presented for verification. The numerical procedure can be easily applied to multi-body system. Using finite element method to obtain the motion modes of an off-shore structure , the numerical procedure...

This paper presents a boundary element method for coupled motion analysis of fluid and solid. The numerical procedure includes the analysis of diffraction problem, radiation problem and the coupled motion problem of a floating body in/on the sea. Numerical results of diffraction problem and coupled motion problem are presented for verification. The numerical procedure can be easily applied to multi-body system. Using finite element method to obtain the motion modes of an off-shore structure , the numerical procedure can also be applied to the off-shore structure.

本文给出了流固偶合运动(包括物体散射辐射及偶合运动)的边界元法理论和应用.对于散射问题,求出了物体引起的散射势及入射波作用于物体的载荷.对于辐射问题,求出了辐射势及物体在流体中运动的附加质量和附加阻尼.偶合问题包括求其中包含的散射势和辐射势以及作用于物体之上的散射力、物体的附加质量、附加阻尼、物体在入射波作用下的运动.在偶合运动问题中,本文采取了边界积分方程与物体在流体中的运动方程联立求解的方法,并将其运用到边界元法的数值过程中.所编制的程序有较高的精度.最后给出了数值计算结果与理论解的比较.

In this paper,the principle of all particular solutions boundary element method is developed,and the calculation formulas concenring linear elastic statics and sound radiation are given. By this method,the coefficient matrix of the boundary integratingequation can be calculated through a calculating singular integrals, and the numercial integration is not needed. The displacement and stress of an arbitrary point can also be obtained which is either on the bounbary or adjacent to the boundary. The example in...

In this paper,the principle of all particular solutions boundary element method is developed,and the calculation formulas concenring linear elastic statics and sound radiation are given. By this method,the coefficient matrix of the boundary integratingequation can be calculated through a calculating singular integrals, and the numercial integration is not needed. The displacement and stress of an arbitrary point can also be obtained which is either on the bounbary or adjacent to the boundary. The example in this paper shows the method is less in calculation,higher in precision and very effective.

文章提出边界元全特解场法原理,并给出了关于线弹性静力学和声辐射问题的有关计算公式.该方法通过一系列给定的特解场来计算边界积分方程的系数矩阵,不仅可以避免计算奇异积分,也不需要插值和数值求积.计算量大幅度减少,而且对边界角点的处理也很方便.全特解场方法不仅可以求出边界未知量,而且可以方便地计算出包括边界点和近边界点在内的任意点的位移和应力.文中给出了关于弹性静力学和声辐射问题的两个算例,计例结果表明:本文提出的方法计算量小、精度高、是求解偏微分方程边值问题的有效方法.

 
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