IEEE Journal on Multiscale and Multiphysics Computational Techniques最新文献_第3页

Efficient Iterative Solution of Combined Source Integral Equation Using Characteristic Basis Function Method With Initial Guess 使用带初始猜测的特征基函数法高效迭代求解组合源积分方程

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2024-03-28 DOI: 10.1109/JMMCT.2024.3382725

Zhiwen Dong;Xinlei Chen;Fan Gao;Changqing Gu;Zhuo Li;Wu Yang;Weibing Lu

引用次数: 0

A 3-D Spectral Element Time-Domain Method With Perfectly Matched Layers for Transient Schrödinger Equation 针对瞬态薛定谔方程的完美匹配层的三维谱元时域法

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2024-03-13 DOI: 10.1109/JMMCT.2024.3399911

Kangshuai Du;Shilie He;Chengzhuo Zhao;Na Liu;Qing Huo Liu

{"title":"A 3-D Spectral Element Time-Domain Method With Perfectly Matched Layers for Transient Schrödinger Equation","authors":"Kangshuai Du;Shilie He;Chengzhuo Zhao;Na Liu;Qing Huo Liu","doi":"10.1109/JMMCT.2024.3399911","DOIUrl":"https://doi.org/10.1109/JMMCT.2024.3399911","url":null,"abstract":"A spectral element time-domain (SETD) method with perfectly matched layers (PML) is proposed to simulate the behavior of electron waves, interference effects and tunneling effects, in three-dimensional (3-D) devices by solving Schrödinger equation. The proposed method employs Gauss-Lobatto-Legendre (GLL) polynomials to represent the wave function. Easy construction of higher-order element makes refinement straightforward and spectral accuracy can be obtained from the SETD. Meanwhile, by utilizing the GLL quadrature, a diagonal mass matrix is obtained which is meaningful in the time-stepping process. Numerical experiments confirm that, for open boundary problems, employing PML yields results characterized by high numerical efficiency, remarkable flexibility and ease of implementation. These findings underscore the effectiveness of SETD-PML in addressing the challenges posed by open boundary conditions, making it a reliable choice for numerical simulations. Some illustrative numerical examples are presented to demonstrate the performance of the proposed method.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141292484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coupled Mechanical and Electromagnetic Analysis of Current on Armature and Rail Interface With Dynamic Contact 带动态触点的电枢和导轨接口电流的耦合机械和电磁分析

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2024-03-07 DOI: 10.1109/JMMCT.2024.3397464

Jinghan Xu;Shengguo Xia;Hongdan Yang;Lixue Chen

{"title":"Coupled Mechanical and Electromagnetic Analysis of Current on Armature and Rail Interface With Dynamic Contact","authors":"Jinghan Xu;Shengguo Xia;Hongdan Yang;Lixue Chen","doi":"10.1109/JMMCT.2024.3397464","DOIUrl":"https://doi.org/10.1109/JMMCT.2024.3397464","url":null,"abstract":"The electrical contact between the armature and rail (A/R) in a railgun is acknowledged as a dynamic sliding interface, exhibiting properties distinct from bulk. This paper employs a 3-D finite element method (FEM) for coupled mechanical and electromagnetic analysis and proposes boundary conditions for dynamic sliding contact to investigate current distribution on the A/R interface. Results show that contact pressure and area have similar trends as the driving current, which confines current distributed areas. The current distributions on stationary and sliding interfaces reveal different patterns but the distributed areas both locate within the contact areas. In the case of the stationary scenario, the current concentrates at the trailing edge when the current increases and diffuses to the leading edge when the current declines. However, due to the velocity skin effect (VSE), the current fails to diffuse into the interior during all stages. Besides, comparative calculations with constant contact indicate that forced shifts of current occur when the contact is dynamic, dominating the current distributions of the A/R interface. Moreover, the influence of the VSE on forced shifts of current is notable, with significant current variations observed near the trailing edge, whereas those around the leading edge are less pronounced.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141292551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Equivalent Circuit Model Development Accounting for Mutual-Coupling Effects 考虑相互耦合效应的等效电路模型开发

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2024-03-06 DOI: 10.1109/JMMCT.2024.3396801

Chandan Roy;Ke Wu

{"title":"Equivalent Circuit Model Development Accounting for Mutual-Coupling Effects","authors":"Chandan Roy;Ke Wu","doi":"10.1109/JMMCT.2024.3396801","DOIUrl":"https://doi.org/10.1109/JMMCT.2024.3396801","url":null,"abstract":"Mutual-coupling effects are of utmost importance in the development of high-frequency circuits and systems. However, it is a common practice to ignore those couplings when establishing equivalent circuit models. Neglecting these couplings leads to inaccurate circuit modelling. Therefore, it becomes imperative to account for mutual couplings in the development of accurate equivalent circuit models. This work presents a holistic process for synthesizing the equivalent circuit model of an electromagnetic (EM) field structure that incorporates mutual couplings of varying orders. The proposed high-order framework begins by developing equivalent circuit models for each individual transmission line discontinuity within the target circuit. Subsequently, the mutual couplings of different orders are extracted in a step-by-step manner. Throughout this process, full-wave EM simulations are deployed, along with a circuit parameter extraction method that utilizes de-embedded circuit responses. By combining these techniques, a comprehensive and accurate equivalent circuit model is generated, enabling a detailed analysis of the target field model structure, and facilitating a deeper understanding of its electrical and magnetic behavior and performance. This paper utilizes a three-step microstrip discontinuity structure and a third-order parallel coupled microstrip filter as examples for theoretical and experimental demonstration of the proposed technique.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140919115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Considering Capacitive Effects in Foil Winding Homogenization 在箔绕组均质化中考虑电容效应

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2024-03-06 DOI: 10.1109/JMMCT.2024.3396823

Jonas Bundschuh;Yvonne Späck-Leigsnering;Herbert De Gersem

引用次数: 0

Electromagnetic-Circuital-Thermal-Mechanical Multiphysics Numerical Simulation Method for Microwave Circuits 微波电路的电磁-电路-热学-力学多物理场数值模拟方法

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2024-03-04 DOI: 10.1109/JMMCT.2024.3372619

Huan Huan Zhang;Zheng Lang Jia;Peng Fei Zhang;Ying Liu;Li Jun Jiang;Da Zhi Ding

引用次数: 0

Spin and Orbital Angular Momenta of Electromagnetic Waves: From Classical to Quantum Forms 电磁波的自旋和轨道角动量：从经典形式到量子形式

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2024-02-29 DOI: 10.1109/JMMCT.2024.3370729

Wei E. I. Sha;Zhihao Lan;Menglin L. N. Chen;Yongpin P. Chen;Sheng Sun

引用次数: 0

Electro-Geometrical Sensitivity Analysis of Electromagnetic Cavity BP-NGD Equalization 电磁腔 BP-NGD 均衡的电几何灵敏度分析

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2024-02-20 DOI: 10.1109/JMMCT.2024.3367604

Blaise Ravelo;Hongyu Du;Glauco Fontgalland;Fayu Wan

{"title":"Electro-Geometrical Sensitivity Analysis of Electromagnetic Cavity BP-NGD Equalization","authors":"Blaise Ravelo;Hongyu Du;Glauco Fontgalland;Fayu Wan","doi":"10.1109/JMMCT.2024.3367604","DOIUrl":"https://doi.org/10.1109/JMMCT.2024.3367604","url":null,"abstract":"This article considers an electro-thermo-geometrical Multiphysics analysis of electromagnetic compatibility (EMC) resonance problem solution by using bandpass (BP) type negative group delay (NGD) equalization method. The rectangular cavity electric model based on EMC frequency domain S-parameter analysis is introduced. The unfamiliar BP-NGD function is specified in order to size the lumped electrical components of the suitable RLC-network based topology. The BP-NGD equalization principle is described including the Multiphysics synoptic analysis by means of electro- thermo-geometrical approach of the problem. The BP-NGD equalization methodology is proposed. The feasibility study of the EMC resonance equalization method is validated by considering a proof-of-concept constituted by 232.9×28×3.8 cm-size rectangular cavity. The BP-NGD active circuit is designed as equalizer by using RLC-series network. The EMC solution is verified by the BP-NGD POC specified by −4 ns NGD value at 0.644 MHz center frequency stating resonance effect reduction with 1-dB flatness. Furthermore, time-domain signal integrity (SI) analysis confirms the EMC cavity resonance resolution by showing output delay, over/under shoot reduction and also input-output cross correlation improvement from 89% to 99%.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140123315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of Perfectly Conducting Objects That Are Invisible to an Incident Plane Wave 设计对入射平面波不可见的完美导电物体

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2024-02-08 DOI: 10.1109/JMMCT.2024.3364084

Johan Helsing;Shidong Jiang;Anders Karlsson

引用次数: 0

A Fast Iterative Physical Optics Method With Quadratic Amplitude and Phase Integral Terms 带有二次振幅和相位积分项的快速迭代物理光学方法

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2024-01-25 DOI: 10.1109/JMMCT.2024.3358327

Yang Su;Yu Mao Wu

{"title":"A Fast Iterative Physical Optics Method With Quadratic Amplitude and Phase Integral Terms","authors":"Yang Su;Yu Mao Wu","doi":"10.1109/JMMCT.2024.3358327","DOIUrl":"https://doi.org/10.1109/JMMCT.2024.3358327","url":null,"abstract":"The iterative physical optics (IPO) method is a valuable technique for analyzing coupled scattering problems. In contrast to the fast physical optics (FPO) method, this article proposes an iterative physical optics method based on quadratic quadrilateral patches (QIPO). Specifically, quadratic patches in the QIPO method offer higher-order accuracy in calculating normal vectors which greatly benefits the accuracy of the iterative induction current. Then, a lit-shadow judgment criterion is introduced, and a general iteration formulation for proposed method is presented. Additionally, new amplitude and phase function expressions suitable for the QIPO method are proposed to accurately compute the far-field results. It is also verified for the case of discretization with quadratic triangular patches (QTIPO). To address numerical singularities, the QIPO method considers a linear phase function, where closed-form solution are provided. The results demonstrate the effectiveness of the treatment in handling singular cases. The accuracy of the QIPO method is validated through comparisons with existing results. Finally, numerical examples confirm that the proposed method reduces the number of patches, minimizes the computational cost of induced current iteration, and accurately calculates far-field results.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139727579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0