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AN EFFICIENT ITERATION ALGORITHM OF MIXED BOUNDARY/FINITE ELEMENT METHOD AND APPLICATION TO FREE TORSIONAL VIBRATION ANALYSIS OF bodies of revolution

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Applied Mathematics and Mechanics(English Edition) 1990年第12期11卷 1187-1194页

作者：王秀喜陈锋钱江 University of Science and Technology of China Hefei

In this paper, the general formulation of anew proposed iteration algorithm of mixed BEM/FEM for eigenvalue problems of elastodynamics is described. Approximate fundamental solutions of elastodynamics are adopted in the normal mixed BEM/FEM equations. The accuracy of solutions is progressively improved by the iteration procedure. Not only could the awkwardness of non-algebraic eigenvalue equations be avoided but also the accuracy of numerical solutions is almost independent of the interior meshing. All these give many advantages in numerical calculation. The algorithm is applied to free torsional vibration analysis of bodies of revolution. A few cases are studied. All of the numerical results are very good.

关键词： mixed BEM/FEM formulation iteration free vibration bodies of revolution

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EXPERIMENTAL RESEARCH ON A SUPERCAVITATING SLENDER BODY OF revolution WITH VENTILATION

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Journal of Hydrodynamics 2002年第2期14卷 17-23页

作者： Feng, Xue-Mei Lu, Chuan-Jing Hu, Tian-Qun Dept. of Eng. Mech. Shanghai Jiaotong Univ. Shanghai 200240 China

The behavior of supercavitating and cavitatlng flow around a conical body of revolution with and without ventilation at several angles of attack was studied experimentally. The hydrodynamic forces for a range of cavitation number were measured. Comparisons of the appearance and the hydrodynamic forces in condition of cavity with and without ventilation were made over the same range of the cavitation number, and a well agreement was obtained. The changes of the drag were especially studied. The experimental results showed that the drag of the model decreased with the presence of supercavity under the ventilation condition.

关键词： Angle measurement bodies of revolution Drag Force control Ventilation

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Fast Inhomogeneous Plane Wave Algorithm for Homogeneous Dielectric Body of revolution

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Communications in Computational Physics 2010年第9期8卷 917-932页

作者： Xi Rui Jun Hu Qing Huo Liu School of Electronic Engineering University of Electronic Science and Technology of ChinaChengduSichuan 610054China Department of Electrical and Computer Engineering Duke UniversityDurhamNC 27708USA

To solve the electromagnetic scattering problem for homogeneous dielectric bodies of revolution(BOR),a fast inhomogeneous plane wave algorithm is *** using the Weyl identity and designing a proper integration path,the aggregation and disaggregation factors can be derived *** with the traditional method of moments(MoM),both the memory and CPU time requirements are reduced for large-scale homogeneous dielectric BOR *** results are given to demonstrate the validity and the efficiency of the proposed method.

关键词： bodies of revolution fast inhomogeneous plane wave algorithm electromagnetic scattering

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