Добірка наукової літератури з теми "Modal summation method"
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Статті в журналах з теми "Modal summation method"
La Mura, C., T. B. Yanovskaya, F. Romanelli, and G. F. Panza. "Three-Dimensional Seismic Wave Propagation by Modal Summation: Method and Validation." Pure and Applied Geophysics 168, no. 1-2 (May 22, 2010): 201–16. http://dx.doi.org/10.1007/s00024-010-0165-2.
Повний текст джерелаQiu, Ju, Wei Lian, Huaxiang Rao, Caiyun Wang, Tengteng Luo, and Jiali Tang. "Localization of Vibration Weak Position of Composites Based on Weighted Modal Strain Energy Summation." Journal of Composites Science 6, no. 11 (October 31, 2022): 324. http://dx.doi.org/10.3390/jcs6110324.
Повний текст джерелаSILVA, R. L., L. M. TRAUTWEIN, C. S. BARBOSA, L. C. ALMEIDA, and G. H. SIQUEIRA. "Empirical method for structural damage location using dynamic analysis." Revista IBRACON de Estruturas e Materiais 13, no. 1 (February 2020): 19–31. http://dx.doi.org/10.1590/s1983-41952020000100003.
Повний текст джерелаDong, Chunguang, Ronghui Wang, Xiaoxia Zhen, and Haonan Ni. "Free vibration of summation and difference resonance of the vertical cable and other coupled structural members." Advances in Structural Engineering 21, no. 5 (October 6, 2017): 707–20. http://dx.doi.org/10.1177/1369433217729515.
Повний текст джерелаKaveh, A., H. Rahami, and Iman Shojaei. "An efficient method for seismic analysis of structures." Engineering Computations 32, no. 6 (August 3, 2015): 1708–21. http://dx.doi.org/10.1108/ec-07-2014-0159.
Повний текст джерелаLiu, Zhong-Sheng, Kun Wang, Cheng Huang, and Su-Huan Chen. "An extended hybrid method for contribution due to truncated lower- and higher-frequency modes in modal summation." Engineering Structures 18, no. 7 (July 1996): 558–63. http://dx.doi.org/10.1016/0141-0296(95)00123-9.
Повний текст джерелаLee, Jongsuh. "Estimation Modal Parameter Variation with Respect to Internal Energy Variation Based on the Iwan Model." Applied Sciences 9, no. 20 (October 12, 2019): 4290. http://dx.doi.org/10.3390/app9204290.
Повний текст джерелаZhang, Tong, Ludi Kang, Xin Li, Hongbo Zhang, and Bilong Liu. "Sound Transmission Prediction of Sandwich Plates With Honeycomb and Foam Cores and an Emphatic Discussion on Radiation Terms." International Journal of Acoustics and Vibration 26, no. 1 (March 30, 2021): 70–79. http://dx.doi.org/10.20855/ijav.2020.25.11735.
Повний текст джерелаZhang, Zhiyi, Yong Chen, Hongguang Li, and Hongxing Hua. "Simulation and Experimental Study on Vibration and Sound Radiation Control with Piezoelectric Actuators." Shock and Vibration 18, no. 1-2 (2011): 343–54. http://dx.doi.org/10.1155/2011/509675.
Повний текст джерелаShen, Runjie, Danqiong Hua, Yiying Wang, Ruimin Xing, and Min Ma. "Ultra-short-time prediction technology of wind power station output based on variational mode decomposition and particle swarm optimization least squares vector machine." E3S Web of Conferences 185 (2020): 01051. http://dx.doi.org/10.1051/e3sconf/202018501051.
Повний текст джерелаДисертації з теми "Modal summation method"
La, Mura Cristina. "Wave propagation in three-dimensional anelastic media: the modal summation method in the WKBJ-approximation." Doctoral thesis, Università degli studi di Trieste, 2009. http://hdl.handle.net/10077/3141.
Повний текст джерелаIn this thesis a new methodology for computing synthetic seismograms, complete of the main direct, refracted, converted phases and surface waves, in three – dimensional anelastic lateral heterogeneous media is presented. It is based on the combination of the Modal Summation technique with the Asymptotic Ray Theory. The three – dimensional models are determined by a set of vertically heterogeneous sections (1D structures) that are juxtaposed on a regular grid. The distribution of these sections in the grid is done in such a way to satisfy the condition of applicability of the WKBJ – approximation, i.e. the lateral variation of all the elastic parameters has to be small with respect to the prevailing wavelength. In each knot of the grid a vertically heterogeneous section is located, hence, the values of the phase velocities, of the phase attenuation and of the group velocities are assigned once and for all. Inside the grid the source and the receiver are located, assigning their coordinates by means of a Cartesian reference system introduced in the grid itself. By this way a vertically heterogeneous structure, hence one-dimensional structure, is associated to the source and another to the receiver. The eigenfunctions of these two structures do contribute to the seismogram. The computational scheme is based, besides on the WKBJ - approximation for weak lateral heterogeneities, on the two point ray – tracing algorithm, by means of the bi - dimensional shooting method. It can be summarized as follows: at first the ray connecting two points, the source and the receiver, is computed solving the Cauchy problem for the system of ordinary differential equations governing the phenomenon of the evolution of the ray itself; the system is solved employing the numerical fourth – order Runge – Kutta method. Once the ray is determined, the attenuation is computed along it, solving, once again using the fourth – order Runge – Kutta method, the Cauchy problem for a system of ordinary differential equations that is made up of four equations: three equations for the ray and one equation governing the evolution of the attenuation along the ray itself. Finally, the geometrical spreading is computed considering two more rays that leave the source with an azimuth that is determined increasing and decreasing the azimuth of the characteristic curve of the ray – tracing system (the true ray) by a fixed quantity. The thesis is divided in two main parts, the first contains a theoretical treatment of the above mentioned arguments, so it opens with a brief summary about the generation of synthetic seismograms in one-dimensional structures by mean of the Modal Summation technique and goes on with the introduction of the WKBJ – approximation for treating the lateral heterogeneities. Then, there is the presentation of the numerical procedure used in this work. The second part is devoted to the validation of the new method, so the simulations executed to this aim are shown. It is very important to stress that the computational codes used in this work are still under development. They will be used for verifying and optimizing the results up to now obtained, both in terms of seismic sources and in terms of structural models, in region of the Scotia Arc.
In questa tesi si presenta una nuova metodologia per il calcolo di sismogrammi sintetici completi delle principali fasi dirette, rifratte, convertite ed onde superficiali in mezzi tridimensionali anelastici lateralmente eterogenei, basata sulla Somma Modale (SM) combinata con la Teoria Asintotica dei Raggi (TAR). I modelli tridimensionali sono determinati da un insieme di sezioni verticalmente eterogenee (strutture 1D) che vengono affiancate su una griglia regolare. La distribuzione di dette sezioni nella griglia e’ tale da soddisfare la condizione di applicabilità della approssimazione WKBJ (acronimo dei nomi dei quattro elaboratori della metodologia: Wentzel, Kramers, Brillouin and Jeffreys), cioè la variazione laterale di tutti i parametri elastici deve essere piccola rispetto alle lunghezze d’onda prevalenti. In ogni nodo della griglia e’ collocata una sezione verticalmente eterogenea, sono, quindi, assegnati una volta per tutte i valori della velocità di fase, dell’attenuazione di fase e della velocità di gruppo. All’interno della griglia si collocano la sorgente ed il ricevitore, assegnando le loro coordinate attraverso un sistema cartesiano di riferimento introdotto nella griglia stessa. In questo modo si associa una struttura verticalmente eterogenea, quindi unidimensionale, alla sorgente ed una al ricevitore. Le autofunzioni di queste due strutture contribuiscono al sismogramma. Lo schema computazionale è basato, oltre che sull’approssimazione WKBJ per eterogeneità laterali deboli, sull’algoritmo per il ray-tracing tra due punti, mediante lo shooting-method bidimensionale. Esso può essere riassunto come segue: dapprima si calcola il raggio che unisce i due punti, la sorgente ed il ricevitore, risolvendo il problema di Cauchy per il sistema di equazioni differenziali alle derivate ordinarie che governa il fenomeno dell’evoluzione del raggio stesso; il sistema è risolto per via numerica mediante il metodo di Runge-Kutta del quarto ordine. Una volta che il raggio è determinato, si calcola lungo esso l’attenuazione, risolvendo, ancora una volta mediante il metodo di Runge-Kutta del quarto ordine, il problema di Cauchy per un sistema di equazioni differenziali alle derivate ordinarie che è costituito dal sistema che governa l’evoluzione del raggio più una quarta equazione che governa l’evoluzione dell’attenuazione lungo il raggio stesso. Infine, il geometrical spreading è calcolato considerando due ulteriori raggi che partono dalla sorgente con un azimuth 5 che è determinato aumentando e diminuendo l’azimuth della curva caratteristica del sistema (raggio vero) di un valore fissato. La tesi è divisa in due parti principali, la prima parte contiene una trattazione teorica degli argomenti precedentemente menzionati, si apre quindi con un breve riassunto sulla generazione di sismogrammi sintetici in strutture unidimensionali mediante la tecnica della Somma Modale e prosegue con l’introduzione dell’approssimazione WKBJ per la trattazione delle eterogeneità laterali. Si passa poi alla presentazione della procedura numerica utilizzata. La seconda parte è dedicata alla validazione del nuovo metodo, dunque sono presentate le simulazioni eseguite a questo scopo. E’ da sottolineare che i codici di calcolo utilizzati, attentamente testati e ripetutamente validati, sono in continuo sviluppo. Essi verranno utilizzati per la verifica e l’ottimizzazione dei risultati fin qui conseguiti, sia in termini di sorgenti sismiche che di modelli strutturali, nella regione dell’Arco di Scotia.
XXI Ciclo
1977
SOARES, ALBERTO. "A MODEL POWER FLOWS BASED ON THE POWER SUMMATION METHOD." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1992. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8982@1.
Повний текст джерелаEste trabalho apresenta uma metodologia para o cálculo de Fluxo de Potência em redes radiais através do Método de Soma de Potências, que explora as características dos parâmetros da rede bem como a sua topologia, constituindo- se em um método bastante rápido e robusto. Propõe-se também uma nova metodologia para o controle de tensão na rede através de rotinas de sensibilidade visando a efetuação de manobras ou cortes de carga na rede. São apresentados testes com sistemas realistas.
This work presents a methodology for radial power flows based on the power Summation Method, able to exploit the network particular characteristics in order to achieve accuracy and efficiency. This work also presents a novel model for radial network control based on sensitivity coefficients that evaluate load transfer or curtailment effects on network performance. Some tests with realistic systems are presented.
Rizzi, Leandro Gutierrez. "Simulações numéricas de Monte Carlo aplicadas no estudo das transições de fase do modelo de Ising dipolar bidimensional." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/59/59135/tde-23052009-134513/.
Повний текст джерелаTwo-dimensional spin model with nearest-neighbor ferromagnetic interaction and long-range dipolar interactions exhibit a rich phase diagram, whose characteristics have been exploited by several studies in the recent literature. Furthermore, the possibility of explain observed phenomena in ultrathin magnetic films, which have many technological applications, also motivates the study of this model. The presence of dipolar interaction term changes the ferromagnetic ground state expected for the pure Ising model to a series of striped phases, which consist of ferromagnetic domains of width $h$ with opposite magnetization. The width of the stripes depends on the ratio $\\delta$ of the ferromagnetic and dipolar couplings. Monte Carlo simulations and reweighting multiple histograms techniques allow us to identify the finite-size critical temperatures of the phase transitions when $\\delta=2$, which corresponds to $h=2$. We calculate, for different lattice sizes, the specific heat and susceptibility of the order parameter around the transition temperatures by means of reweighting techniques. This allows us to identify in these observables, as functions of temperature, the distinct maxima and thereby to estimate the finite-size critical temperatures with high precision. We present numerical evidence of the existence of a Ising nematic phase for large lattice sizes. Our results show that simulations need to be performed for lattice sizes at least as large as $L=48$ to clearly observe the Ising nematic phase. To access how the long-range dipolar interaction may affect physical estimates we also evaluate the integrated autocorrelation time in energy time series. This allows us to infer how severe is the critical slowing down for this system with long-range interaction and nearby thermodynamic phase transitions. The results obtained using a local update algorithm are compared with results obtained using the multicanonical algorithm.
Wirnsberger, Peter. "Computer simulation and theoretical prediction of thermally induced polarisation." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/282988.
Повний текст джерелаЧастини книг з теми "Modal summation method"
Mills, R. W., M. F. James, and D. R. Weaver. "Study of the Delayed Neutron Yield and its Time Dependence by the Summation Method, and the Sensitivity of the Yield to Parameters of the Independent Yield Model and the Decay Data." In Nuclear Data for Science and Technology, 86–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-58113-7_24.
Повний текст джерела"Solving X-ray Crystal Structures." In Pharmaceutical Crystallography: A Guide to Structure and Analysis, 194–213. The Royal Society of Chemistry, 2019. http://dx.doi.org/10.1039/bk9781782629665-00194.
Повний текст джерелаAlzahrani, Sahar Matar. "A Framework for the Assessment of Learner Autonomy in Language Learning." In ICT-Based Assessment, Methods, and Programs in Tertiary Education, 1–22. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-3062-7.ch001.
Повний текст джерелаRiascos, Roberto, Tomislava Majić, Egon Ostrosi, Jean-Claude Sagot, and Josip Stjepandić. "Functional Approach for Summative Risk Management of Medical Products." In Advances in Transdisciplinary Engineering. IOS Press, 2021. http://dx.doi.org/10.3233/atde210138.
Повний текст джерелаStevens, Helena, and Tracy Peed. "Culturally Responsive Program Evaluations." In Research Anthology on Culturally Responsive Teaching and Learning, 254–75. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-9026-3.ch016.
Повний текст джерелаStevens, Helena, and Tracy Peed. "Culturally Responsive Program Evaluations." In Implementing Culturally Responsive Practices in Education, 16–37. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-3331-4.ch002.
Повний текст джерелаSaito, Ken, Minami Takato, Yoshifumi Sekine, and Fumio Uchikoba. "Silicon Micro-Robot With Neural Networks." In Rapid Automation, 979–90. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8060-7.ch045.
Повний текст джерелаSaito, Ken, Minami Takato, Yoshifumi Sekine, and Fumio Uchikoba. "Silicon Micro-Robot with Neural Networks." In Engineering Creative Design in Robotics and Mechatronics, 1–10. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-4225-6.ch001.
Повний текст джерелаKennedy, Carol Kahan, and Tina Yagjian. "Creating an Early Model of Teaching at The New School." In Critical Examinations of Distance Education Transformation across Disciplines, 15–43. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-6555-2.ch002.
Повний текст джерелаТези доповідей конференцій з теми "Modal summation method"
Sung, Shung H., and Donald J. Nefske. "Overview of Structural-Acoustic Modal Analysis Under Random Loading." In ASME 2018 Noise Control and Acoustics Division Session presented at INTERNOISE 2018. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ncad2018-6130.
Повний текст джерелаLi, Hua, and Kaiming Hu. "Fuzzy Controller for Active Vibration Control of Cylindrical Shells." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-72140.
Повний текст джерелаBelibassakis, K. A., and G. A. Athanassoulis. "A Coupled-Mode Method for Acoustic Propagation and Scattering in Inhomogeneous Ocean Waveguides." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23317.
Повний текст джерелаHarata, Yuji, and Takashi Ikeda. "Modal Analysis to Interpret Localization Phenomena in Two Nonlinear Tuned Mass Dampers." In ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-69248.
Повний текст джерелаBeck, Joseph A., Jeffrey M. Brown, Charles J. Cross, and Joseph C. Slater. "Probabilistic Mistuning Assessment Using Nominal and Geometry Based Mistuning Methods." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68533.
Повний текст джерелаBogard, F., K. Debray, Y. Q. Guo, and A. Pavan. "Determination of Optimum Sensor Positions for Defect Detection on Revolving Machines by a Finite Element Vibration Analysis." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/dac-14506.
Повний текст джерелаLi, H., Z. B. Chen, S. D. HU, and H. S. Tzou. "Optimal Control of Clamped-Free Conical Shell Using Diagonal Piezoelectric Sensor and Actuator." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63028.
Повний текст джерелаTan, Zhimin, Yucheng Hou, John Zhang, and Terry Sheldrake. "Irregular Wave Simulation and Fatigue Damage Evaluation of a Flexible Riser Subjected to Bi-Modal Sea States." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83386.
Повний текст джерелаWu, Shanyue, Yingyun Huang, and Shijian Zhu. "Study on Air Spring’s Finite Element Model." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/vib-48364.
Повний текст джерелаLee, Chan Hui, Keun Bok Song, and Heui Won Kim. "Vibration Analysis and Evaluation for the Offshore Structure Using Simplified Model and RSS Method." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-84053.
Повний текст джерела