IEEE Journal on Multiscale and Multiphysics Computational Techniques最新文献_第7页

Algebraic and Fast Nested Construction Method for Generating Rank-Minimized ${mathcal H}^{2}$-Matrix for Solving Electrically Large Surface Integral Equations 求解电大曲面积分方程生成秩最小化${数学H}^{2}$-矩阵的代数快速嵌套构造方法

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-10-23 DOI: 10.1109/JMMCT.2023.3326774

Chang Yang;Dan Jiao

引用次数: 0

Excitation of Electromagnetic Field Inside Rotating Spherical Cavity 旋转球腔内电磁场的激发

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-10-09 DOI: 10.1109/JMMCT.2023.3321123

Daria E. Titova

引用次数: 0

Multiphysics Design Methodology for U-Band Temperature-Compensated Bandstop Filters u波段温度补偿带阻滤波器的多物理场设计方法

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-09-07 DOI: 10.1109/JMMCT.2023.3312756

Chang Che;Yi Zeng;Ming Yu

{"title":"Multiphysics Design Methodology for U-Band Temperature-Compensated Bandstop Filters","authors":"Chang Che;Yi Zeng;Ming Yu","doi":"10.1109/JMMCT.2023.3312756","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3312756","url":null,"abstract":"This article proposes a novel multiphysics design methodology for a U-band bandstop waveguide filter with temperature compensation (TC). A bimetal TC structure is first implemented to a bandstop filter in such high frequencies for working in a wide temperature range (−20 °C ∼ 70 °C) with little frequency drift. The synthesis and design of the bandstop filter are detailed. The proposed methodology mainly guides the design of the bimetal actuator from geometry, multiphysics, post-production and theoretical promotion. The geometric derivation for the bimetal reactions is elaborated and leads to a simplified equivalent model. Multiphysics analysis, including temperature, thermal stress, and electromagnetic field, is co-elaborated in the design process. Considering the fabrication errors, a post-production adjustment method for the TC structure is designed for practical use. Dimensionless formulae are introduced to provide general design guidelines and rules for filters with different dimensions and TC demands. Finally, a sixth-order temperature-compensated bandstop filter is manufactured and tested in temperature cycles. The measurements have validated the theoretical and simulation results.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"372-381"},"PeriodicalIF":2.3,"publicationDate":"2023-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49962814","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

Detecting Resonance of Radio-Frequency Cavities Using Fast Direct Integral Equation Solvers and Augmented Bayesian Optimization 基于快速直接积分方程求解和增广贝叶斯优化的射频腔谐振检测

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-09-04 DOI: 10.1109/JMMCT.2023.3311322

Yang Liu;Tianhuan Luo;Aman Rani;Hengrui Luo;Xiaoye Sherry Li

引用次数: 0

Electro-Acoustic Scattering From a Pulsating Sphere 脉动球的电声散射

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-08-24 DOI: 10.1109/JMMCT.2023.3307180

Viswarupa V;Yoginder Kumar Negi;N. Balakrishnan

引用次数: 0

Coupling of Magneto–Hydrodynamics and Structural Models to Predict Wall Deformation due to Arcing 磁流体力学与结构模型耦合预测电弧引起的壁面变形

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-08-17 DOI: 10.1109/JMMCT.2023.3306154

Christian Rümpler;Albert Zacharias;Rakesh B. Chechare;Li Yu;Carsten Dehning

{"title":"Coupling of Magneto–Hydrodynamics and Structural Models to Predict Wall Deformation due to Arcing","authors":"Christian Rümpler;Albert Zacharias;Rakesh B. Chechare;Li Yu;Carsten Dehning","doi":"10.1109/JMMCT.2023.3306154","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3306154","url":null,"abstract":"Electric arc discharges in low–voltage (LV) or medium–voltage (MV) power distribution devices can cause significant pressure rise. For example, a high amplitude pressure peak can damage the housing of a LV circuit breaker initiating cracks during short circuit interruption. In case of larger deformations or creation of additional gaps, the impact of the geometric changes on the pressure rise cannot be neglected. This article describes a new three–codes–coupling approach, wherein a magneto–hydrodynamics (MHD) model consisting of a fluid–flow solver and an electromagnetic solver are coupled with a structural dynamics solver to build a complex co–simulation model. This model can predict the deformation of structures under the influence of arcing pressure. The applicability of the model was tested with a setup, where an electric arc is ignited inside an arc chamber that has a flexible plate on one side. Predicted pressure rise and displacement results are in good agreement with test data. In a more complex setup, this approach was applied to model the bending of a flexible baffle plate in the venting path of a LV circuit breaker during short circuit interruption. Additional challenges such as contact motion and pre–stress analysis were resolved.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"343-353"},"PeriodicalIF":2.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49962811","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

Generalized Helmholtz Decomposition for Modal Analysis of Electromagnetic Problems in Inhomogeneous Media 非均匀介质中电磁问题模态分析的广义Helmholtz分解

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-08-17 DOI: 10.1109/JMMCT.2023.3305008

Jie Zhu;Thomas E. Roth;Dong-Yeop Na;Weng Cho Chew

引用次数: 0

Optimization Using Backtracking Search Algorithm for the Design of Magnetron Anode Block and Pill-Box RF Window 基于回溯搜索算法的磁控管阳极块和药盒射频窗口设计

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-08-14 DOI: 10.1109/JMMCT.2023.3304970

Patibandla Anilkumar;Dobbidi Pamu;Tapeshwar Tiwari

{"title":"Optimization Using Backtracking Search Algorithm for the Design of Magnetron Anode Block and Pill-Box RF Window","authors":"Patibandla Anilkumar;Dobbidi Pamu;Tapeshwar Tiwari","doi":"10.1109/JMMCT.2023.3304970","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3304970","url":null,"abstract":"Determining the design variables of the magnetron sub-assemblies using empirical equations is a challenge. In this article, with the help of the popular backtracking search algorithm (BSA), the bare anode block of the magnetron and pill-box RF window are designed at frequency of 2.998 GHz. The convergence results with BSA are validated with the harmony search algorithm (HSA) and particle swarm optimization (PSO). The optimized design variables of bare anode are hole radius (\u0000<inline-formula><tex-math>$a$</tex-math></inline-formula>\u0000), slot length (\u0000<inline-formula><tex-math>$l_{s}$</tex-math></inline-formula>\u0000), slot width (\u0000<inline-formula><tex-math>$W_{s}$</tex-math></inline-formula>\u0000), and anode height (\u0000<inline-formula><tex-math>$h_{a}$</tex-math></inline-formula>\u0000) which are found to be 3.1, 2.9, 12.8, and 100 mm, respectively, and converge within 150 iterations with BSA. The optimized results are compared to simulated results which are nearly identical with a negligible relative difference of \u0000<inline-formula><tex-math>$pi$</tex-math></inline-formula>\u0000-mode is 1.08%. From the pill-box RF window design, multi-objective optimization is carried out to reach the desired frequency and to achieve minimized reflections by maximizing the bandwidth. The corresponding design variables dielectric thickness (\u0000<inline-formula><tex-math>$t_{w}$</tex-math></inline-formula>\u0000), cavity length (\u0000<inline-formula><tex-math>$C_{l}$</tex-math></inline-formula>\u0000), and cavity radius (\u0000<inline-formula><tex-math>$C_{r}$</tex-math></inline-formula>\u0000) which are 2.5, 30.4, and 41.5 mm, respectively. Pareto multi-objective BSA (PMBSA) is validated with the weighted sum approach (WSA). Due to its simplicity and lower latency, optimization approach is helpful to designers to develop the microwave devices.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"314-321"},"PeriodicalIF":2.3,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49962808","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

Electromagnetic Field Reconstruction and Source Identification Using Conditional Variational Autoencoder and CNN 基于条件变分自编码器和CNN的电磁场重建与源识别

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-08-14 DOI: 10.1109/JMMCT.2023.3304709

Sami Barmada;Paolo Di Barba;Nunzia Fontana;Maria Evelina Mognaschi;Mauro Tucci

引用次数: 0

Lorentz-Invariant Meshless Vector Basis Function for Translational Motion of Coordinates in Computational Electromagnetics 计算电磁学中坐标平移运动的洛伦兹不变无网格向量基函数

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-08-09 DOI: 10.1109/JMMCT.2023.3303813

Arman Afsari;Paulo de Souza;Amin Abbosh;Yahya Rahmat-Samii

{"title":"Lorentz-Invariant Meshless Vector Basis Function for Translational Motion of Coordinates in Computational Electromagnetics","authors":"Arman Afsari;Paulo de Souza;Amin Abbosh;Yahya Rahmat-Samii","doi":"10.1109/JMMCT.2023.3303813","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3303813","url":null,"abstract":"Laws of physics remain unchanged under translational motion of coordinates. To guarantee the above postulate in electromagnetics, Lorenz gauge eliminates the additional terms generated in the wave equation of magnetic vector potential during translational motion. When it comes to computational electromagnetics, nonetheless, Coulomb gauge is still preferred to represent the divergence of the magnetic vector potential; the vector basis functions involved in the computation of magnetic vector potential are thus divergence-free. There is, however, an immediate consequence that we shall consider here. These vector basis functions cannot incorporate any kinematic transformation of the system of coordinates. The solution achieved by them is, therefore, invalid under translational motion of the system of coordinates as a whole. Less attention has been paid to this side of computational electromagnetics, as the problems that we solve do not usually undergo any kinematic transformation. The new meshless vector basis function presented in this article is Lorentz-invariant. The solution achieved by it is, therefore, valid under translational motion. Even in local problems, the solution achieved by the newly-introduced Lorentz-invariant vector basis function demonstrates more accuracy and efficiency with respect to the solution achieved by the divergence-free vector basis functions in meshless method.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"281-295"},"PeriodicalIF":2.3,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49962914","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