南開科技大學圖書館 |

Language: 繁體中文

說明(常見問題)

南開科技大學

圖書館首頁

編目中圖書申請

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Mixed-field finite-element computations.

Sitapati, Kartik.

Mixed-field finite-element computations.

紀錄類型:	書目-電子資源 : 單行本
正題名/作者:	Mixed-field finite-element computations./
作者:	Sitapati, Kartik.
面頁冊數:	222 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-06, Section: B, page: 3076.
Contained By:	Dissertation Abstracts International65-06B.
標題:	Engineering, Electronics and Electrical. -
電子資源:	Download fulltext (下載全文)
ISBN:	0496835742

Mixed-field finite-element computations.
Sitapati, Kartik.

Mixed-field finite-element computations. - 222 p.

Source: Dissertation Abstracts International, Volume: 65-06, Section: B, page: 3076.

Thesis (Ph.D.)--Virginia Polytechnic Institute and State University, 2004.

A new method called the Direct Method is developed to solve for the propagating modes in waveguides via the finite-element method. The variational form of the Direct method is derived to ensure that an extremum is reached. The Direct method uses Maxwell's equations directly, both zero and first-order, scalar and vector bases that are used in the finite-element formulation. The direct solution method solves for both the magnetic and electric fields simultaneously. Comparisons are made with the traditionally used vector-Helmholtz equation set. The advantages and disadvantages of the newly developed method is described as well as several results displayed using the WR-90 waveguide and a circular waveguide as test waveguides. Results include a partially filled dielectric loaded rectangular waveguide. The effects of including the divergence of the fields in the functional as penalty terms on the quality of results obtained by the Direct method and the vector-Helmholtz method is explored. The quality of results is gauged on the accuracy of the computed modes as well as the elimination or a significant reduction in the number of 'spurious modes' that are often encountered in solutions to waveguide problems. It is shown that computational time for the solution and computer storage requirements exceed the typically used Helmholtz equation method but the results obtained can be more accurate. Future work may include developing a sparse eigenvalue solution method that could reduce the solution time and storage requirements significantly.

ISBN: 0496835742Subjects--Topical Terms:

170927
Engineering, Electronics and Electrical.

Mixed-field finite-element computations.
LDR:03410nmm 2200277 4500 001 1000004297
005 20051102155243.5
008 141201s2004 eng d
020 $a 0496835742
035 $a (UnM)AAI3136376
035 $a AAI3136376
040 $a UnM $c UnM{me_controlnum}
100 1 $a Sitapati, Kartik. $3 1000005615
245 1 0 $a Mixed-field finite-element computations.
300 $a 222 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-06, Section: B, page: 3076.
500 $a Chair: William A. Davis.
502 $a Thesis (Ph.D.)--Virginia Polytechnic Institute and State University, 2004.
520 $a A new method called the Direct Method is developed to solve for the propagating modes in waveguides via the finite-element method. The variational form of the Direct method is derived to ensure that an extremum is reached. The Direct method uses Maxwell's equations directly, both zero and first-order, scalar and vector bases that are used in the finite-element formulation. The direct solution method solves for both the magnetic and electric fields simultaneously. Comparisons are made with the traditionally used vector-Helmholtz equation set. The advantages and disadvantages of the newly developed method is described as well as several results displayed using the WR-90 waveguide and a circular waveguide as test waveguides. Results include a partially filled dielectric loaded rectangular waveguide. The effects of including the divergence of the fields in the functional as penalty terms on the quality of results obtained by the Direct method and the vector-Helmholtz method is explored. The quality of results is gauged on the accuracy of the computed modes as well as the elimination or a significant reduction in the number of 'spurious modes' that are often encountered in solutions to waveguide problems. It is shown that computational time for the solution and computer storage requirements exceed the typically used Helmholtz equation method but the results obtained can be more accurate. Future work may include developing a sparse eigenvalue solution method that could reduce the solution time and storage requirements significantly.
520 $a The Direct method of solution in dynamics resulted after an initial search in magnetostatics for methods to solve for the magnetic field without using the magnetic-vector potential using finite-element methods. A variational derivation that includes the boundary conditions is developed for the magnetic-vector potential method. Several techniques that were used to attempt accurate solutions for the magnetostatic fields with multiple materials and without the use of the magnetic-vector potential are described. It was found that some of the newly developed general techniques for magnetostatics are only accurate when homogeneous media are present. A method using two curl equations is developed which is a Direct method in magnetostatics and reveals the interaction between the bases used. The transition from magnetostatics to dynamics is made and similar Direct methods are applied to the waveguide problem using different bases.
590 $a School code: 0247.
650 4 $a Engineering, Electronics and Electrical. $3 170927
690 $a 0544
710 2 0 $a Virginia Polytechnic Institute and State University. $3 1000005536
773 0 $t Dissertation Abstracts International $g 65-06B.
790 1 0 $a Davis, William A., $e advisor
790 $a 0247
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3136376 $z Download fulltext (下載全文)

館藏地: 出版年: 卷號:

館藏

此限制條件找不到符合的館藏，請您更換限制條件。

多媒體

評論

新增評論分享你的心得

建立或儲存個人書籤

書目轉出

取書館別