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Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Experimental modal analysi"

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Dušek, J., M. Dohnal, and T. Vogel. "Numerical analysis of ponded infiltration experiment under different experimental conditions." Soil and Water Research 4, Special Issue 2 (March 19, 2010): S22—S27. http://dx.doi.org/10.17221/1368-swr.

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One of the most important properties, affecting the flow regime in the soil profile, is the topsoil saturated hydraulic conductivity (<I>K<SUB>s</SUB></I>). The laboratory-determined <I>K<SUB>s</SUB> </I>often fails to characterise properly the respective field value; the <I>K<SUB>s</SUB> </I>lab estimation requires labour intensive sampling and fixing procedures, difficult to follow in highly structured and stony soils. Thus, simple single- or double-ring ponded infiltration experiments are frequently performed in situ to obtain the field scale information required. In the present study, several important factors, affecting the infiltration rate during the infiltration experiments, are analysed using three-dimensional axisymmetric finite-element model S2D. The examined factors include: (1) the diameter of the infiltration ring, (2) the depth of water in the ring, (3) the depth of the ring insertion under the soil surface, (4) the size and the shape of the finite-element mesh near the ring wall, and (5) the double- vs. single-ring setup. The analysis suggests that the depth of the ring insertion significantly influences the infiltration rate. The simulated infiltration rates also exhibit high sensitivity to the shape of the finite-element mesh near the ring wall. The steady-state infiltration rate, even when considering a double-ring experiment, is significantly higher than the topsoil saturated hydraulic conductivity. The change of the water depth in the outer ring has only a small impact on the infiltration rate in the inner ring.
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Yılmaz, Murat, and Murat Uysal. "TRAPEZ SACLARIN TİTREŞİM DAVRANIŞLARININ SONLU ELEMANLAR VE DENEYSEL MODAL ANALİZLERİYLE İNCELENMESİ." e-Journal of New World Sciences Academy 16, no. 2 (April 25, 2021): 7–19. http://dx.doi.org/10.12739/nwsa.2021.16.2.2a0186.

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Huňady, Róbert, František Trebuňa, Martin Hagara, and Martin Schrötter. "The Use of Modan 3D in Experimental Modal Analysis." Applied Mechanics and Materials 486 (December 2013): 36–41. http://dx.doi.org/10.4028/www.scientific.net/amm.486.36.

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Experimental modal analysis is a relatively young part of dynamics, which deals with the vibration modes identification of machines or their parts. Its development has started since the beginning of the eighties, when the computers hardware equipment has improved and the fast Fourier transform (FFT) could be used for the results determination. Nowadays it provides an uncountable set of vibration analysis possibilities starting with conventional contact transducers of acceleration and ending with modern noncontact optical methods. In this contribution we mention the use of high-speed digital image correlation by experimental determination of mode shapes and modal frequencies. The aim of our work is to create a program application called Modan 3D enabling the performing of experimental modal analysis and operational modal analysis. In this paper the experimental modal analysis of a thin steel sample performed with Q-450 Dantec Dynamics is described. In Modan 3D the experiment data were processed and the vibration modes were determined. The reached results were verified by PULSE modulus specialized for mechanical vibration analysis.
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覃, 海懂. "The Experimental Modal Analysis of Five-Storey Building Scale Model." Hans Journal of Civil Engineering 06, no. 03 (2017): 272–79. http://dx.doi.org/10.12677/hjce.2017.63031.

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Pauwels, Steven, Jan Debille, Jeff Komrower, and Jenny Lau. "Experimental Modal Analysis: Efficient Geometry Model Creation Using Optical Techniques." Journal of the IEST 49, no. 2 (October 1, 2006): 104–13. http://dx.doi.org/10.17764/jiet.49.2.1210836g31831777.

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Experimental modal analysis (EMA) is widely used to characterize the dynamic properties of structures. Recently EMA is being used on more complex structures often involving hundreds of measurement points. Modal analysis results are frequently used in combination with numerical models, imposing higher standards on the quality of the modal parameter estimation and the accuracy of the geometry models. These requirements are often contradictory to the availability of test cells and prototypes. In order to solve this challenge, innovative solutions using optical techniques have been developed that simplify and accelerate the creation of a geometrical model of a test object, while at the same time increase the accuracy of measured coordinates. Industrial applicability of these techniques is proven by a number of benchmarks on real-life structures.
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Sochacki, Wojciech. "An Experimental Modal Analysis of the Laboratory Truck Crane Model." PAMM 4, no. 1 (December 2004): 416–17. http://dx.doi.org/10.1002/pamm.200410189.

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Bermúdez, Carlos, Cristian Sosa, and Annie Planchart. "Polidocanol versus absolute alcohol as sclerosing substances in experimental animal model." Anales de la Facultad de Ciencias Médicas (Asunción) 51, no. 2 (August 30, 2018): 69–78. http://dx.doi.org/10.18004/anales/2018.051(02)69-078.

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Katsumi, Toshiyuki, and Satoshi Kadowaki. "ICONE23-1030 EXPERIMENT/ANALYSIS OF DEFLAGRATION AND ESTABLISHMENT OF ACCELERATION MODEL IN FLAME PROPAGATION." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2015.23 (2015): _ICONE23–1—_ICONE23–1. http://dx.doi.org/10.1299/jsmeicone.2015.23._icone23-1_19.

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Żółtowski, Mariusz, and Krzysztof Napieraj. "Experimental modal analysis in research." Budownictwo i Architektura 16, no. 3 (December 1, 2017): 005–12. http://dx.doi.org/10.24358/bud-arch_17_163_01.

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Experimental modal analysis has grown steadily in popularity since the advent of the digital FFT spectrum analyser in the 1970’s. This days impact testing has become widespread as a fast and economical means of finding the vibration modes of a machine or structure. Its significantly use ascending roles can be seen also in the civil engineering industry [6]. This paper reviews the main topics associated with experimental modal analysis including making FRF measurements, modal excitation techniques, and modal parameter estimation from a set of FRFs.
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Ravina, Enrico, Paolo Silvestri, and Antonino Airenti. "Experimental modal analysis of bows." Journal of the Acoustical Society of America 123, no. 5 (May 2008): 3659. http://dx.doi.org/10.1121/1.2934970.

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Дисертації з теми "Experimental modal analysi"

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ZANOTTI, FRAGONARA LUCA. "Dynamic models for ancient heritage structures." Doctoral thesis, Politecnico di Torino, 2012. http://hdl.handle.net/11583/2502121.

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Risks to cultural heritage and the related losses should be mitigated before disasters such as earthquakes happen. Risks can be addressed by various means, from raising the cultural attention of authorities to documenting the artistic or historical value of an object. The main contribution of structural engineering to cultural heritage concerns the regular maintenance and monitoring for risk reduction. Risk mitigation of historical buildings, as a part of the more general concept of conservation, involves different disciplines. Teams need to be multidisciplinary and information deriving from historical, metric, stylistic, structural, seismic, geotechnical and physical analysis may contribute to the achievement of an overall comprehension of cultural assets. The synergic action of the characterization and monitoring techniques are essential factors to understand, on one hand the mechanisms and the consequences of degradation and, on the other hand, to provide reliable and well-grounded guidelines for the definition of technical interventions to prevent/ to stop the degradation phenomena, to restore the functionality and the use of the historical building/ artifact, or to predict, mitigate and even control the response to accidental events, including strong motions. In this field, an important role is played not only by the analytical aspects, but also by the development and validation of innovative materials and systems for conservation. International deontological guidelines on conservation of cultural heritage define the structural rehabilitation of heritage structures as the cure of a sick person, hence “the heritage structures require anamnesis, diagnosis, therapy and controls, corresponding respectively to the searches for significant data and information, individuation of the causes of damage and decay, choice of the remedial measures and control of the efficiency of the interventions”. Moreover, the same codes state that: “the best therapy is preventive maintenance”, which can only be achieved via monitoring of the structure. In this thesis work a few topical issues of the structural modelling, monitoring and assessment of historic masonry buildings were addressed, with particular emphasis on the dynamic testing and identification. The possible connections with other disciplines are analysed and discussed throughout the text. In this framework, the outline of the thesis includes an introductive first chapter in which the context established by the most recent codes and guidelines concerning the architectural heritage conservation is duly reviewed and analysed. The importance of attaining a knowledge of the structure is also discussed. The second chapter sets up the scene, in which it introduces the principal issues of seismic risk and safety assessment of architectural heritage. Firstly, a brief overview is given of the seismic risk and of geological and geotechnical aspects as related to ancient heritage. Successively, the viability of performance-based approaches, for application to the seismic assessment of architectural heritage, is discussed also in the light of a few recent proposals. In this context, the fundamentals of structural health monitoring are also reported. Chapter 3 is intended to stress the importance of modal testing as an effective tool for ancient structures characterisation, so it starts with a state-of-the-art on linear system identification methods with emphasis on output-only techniques. In particular, time domain and joint time-frequency domain identification techniques are introduced and deeply analysed. Model updating is then addressed and its connection with operational modal analysis is underlined. Finally, a few noteworthy examples of linear identification and model updating of architectural heritage structures are reported. Chapter 4 is about the dynamic and seismic behaviour of domes. The coverage focuses on three ideal benchmarks on reconciling geometric survey with dynamic monitoring. The analyses concerned structures with oval shape domes, such as the Sanctuary of Vicoforte, S. Caterina in Casale Monferrato and S. Agostino in L’Aquila. The final products are virtual models which were enabled to predict the linear dynamic response under earthquake excitation. Chapter 5 inspects modelling strategies suited for masonry under intense seismic excitations. The state-of-the-art covers both models for equivalent static analysis and models which operates in dynamics. A model allowing for stiffness degradation, pinching and hysteresis is then proposed, whose formulation admits extensions to multiple degree of freedom systems. The proposal originates from the well-known Bouc-Wen model. Chapter 6 deals with non-linear identification methods. In perspective, also non-linear identification is expected to become a powerful tool in the context of structural and seismic reliability assessment, especially in the light of the increasing levels of knowledge and prediction capabilities which recent standards strive for. Unfortunately, non-linear identification is to date a specialized and challenging matter, and it has been seldom applied to full-scale structures. In this chapter, special emphasis is given to on-line implementations, with several numerical examples showing the potential of non-linear as well as hysteretic system identification. The last chapter presents an experimental application of non-linear identification. A scaled model of a two-span masonry arch bridge has been artificially damaged and monitored at each damage step. A non-linear identification has been performed from shaker tests data. Results of the experimental campaign will be used to corroborate a non-linear and hysteretic model of the bridge endowed with prediction capabilities.
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Potgieter, Brendon Ryan. "Experimental modal analysis and model validation of antenna structures." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5423.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: Numerical design optimisation is a powerful tool that can be used by engi- neers during any stage of the design process. Structural design optimisation is a specialised usage of numerical design optimisation that has been adapted to cater speci cally for structural design problems. A speci c application of structural design optimisation that will be discussed in the following report is experimental data matching. Data obtained from tests on a physical structure will be matched with data from a numerical model of that same structure. The data of interest will be the dynamic characteristics of an antenna structure, focusing on the mode shapes and modal frequencies. The structure used was a scaled, simpli ed model of the Karoo Array Telescope-7 (KAT-7) antenna structure. Experimental data matching is traditionally a di cult and time-consuming task. This report illustrates how optimisation can assist an engineer in the process of correlating a nite element model with vibration test data.
AFRIKAANSE OPSOMMING: Numeriese ontwerp-optimisering is 'n kragtige ingenieurshulpmiddel wat ty- dens enige stadium in die ontwerpsproses ingespan kan word. Strukturele ontwerp-optimisering is 'n gespesialiseerde gebruik van numeriese ontwerp- optimisering wat aangepas is om spesi ek van diens te wees by die oplos van strukturele ontwerpsprobleme. 'n Spesi eke toepassing van strukturele ontwerp-optimisering wat in hierdie verslag bespreek sal word, is eksperi- mentele datakorrelasie. Data afkomstig van toetse op 'n siese struktuur sal gekorreleer word met data afkomstig van 'n numeriese model van die selfde struktuur. Die data van belang is die dinamiese eienskappe van 'n anten- nastruktuur, spesi ek die modusvorme en modale frekwensies. Die betrokke struktuur wat gebruik is, is 'n vereenvoudigde skaalmodel van die Karoo Array Telescope-7 (KAT-7) antennastruktuur. Eksperimentele datakorrelasie is, tradisioneel gesproke, 'n moeilike en tydro- wende taak. Hierdie verslag sal illustreer op watter wyse optimisering 'n inge- nieur van hulp kan wees in die proses om 'n eindige elementmodel met vibrasietoetsdata te korreleer.
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Aluri, Srinivas. "Updating low-profile FRP deck FE model using experimental modal analysis." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4656.

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Thesis (M.S.)--West Virginia University, 2006.
Title from document title page. Document formatted into pages; contains vi, 76 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 60-61).
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You, You, and Daxin Chen. "Modal Analysis on a MIMO System : For an asphalt roller CC1200." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-10998.

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Impact hammer is the current modal testing way in Dynapac testing department. Due to highly damped characteristic of big construction machines, there are a few weaknesses for modal testing when using hammer, such as short response time, limited frequency resolution, poor quality of frequency response functions. Therefore, a more advanced excitation equipment is needed to improve the measurement quality. The object for this study is to compare two different measuring methods. The thesis will show a comparison between the hammer testing and the shaker MIMO testing compared with analytical model in a highly damped system. It will also give a reference for further highly damped modal analysis and budgetary assessment to decide the budget expenditure. Result from shaker testing shows a little better correlation than hammer testing compared with FEM model. While the correlation between FEM model and measurement is bad due to many reasons, such as many local modes that can not excited, lack of excitation points, unexpected noise and error from the measurement. While considering the compared results obtained from this machine for now, a simpler structure experiment is suggested to be carried on in the future. Shorter length of stinger can be used to enable higher amplitude of force to excite the property on this machine.
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Mejri, Seifeddine. "Identification et modélisation du comportement dynamique des robots d'usinage." Thesis, Clermont-Ferrand 2, 2016. http://www.theses.fr/2016CLF22688/document.

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La robotisation des procédés d’usinage suscite l’intérêt des industriels en raison du grand espace de travail et le faible coût des robots par rapport aux machines-outils conventionnelles et la possibilité d’usiner des pièces de formes complexes. Cependant, la faible rigidité de la structure robotique favorise le déclenchement de phénomènes dynamiques liés à l’usinage sollicitant le robot en bout de l’outil qui dégradent la qualité de surface de la pièce usinée. L’objectif de ces travaux de thèse est de caractériser le comportement dynamique des robots en usinage. Ces travaux ont suivi une démarche en trois étapes : La modélisation d’un premier modèle considéré de référence où le robot est au repos. Ensuite l’identification du comportement dynamique du robot en service. Enfin, l’exploitation des modèles dynamiques du robot en vue de prédire la stabilité de coupe. L’originalité de ces travaux porte sur le développement des méthodes d’identification modale opérationnelles. Elles permettent d’intégrer les conditions réelles d’usinage et d’élaborer des modèles plus précis que le premier modèle de connaissance sans être biaisés par l’effet des harmoniques de rotation de l’outil. Enfin, des préconisations sur le choix de configurations du robot et sur la direction des forces d’excitation sont proposées pour assurer la stabilité de la coupe lors de l’usinage robotisé
Machining robots have major advantages over cartesian machine tools because of their flexibility, their ability to reach inaccessible areas on a complex part, and their important workspace. However, their lack of rigidity and precision is still a limit for precision tasks. The stresses generated by the cutting forces and inertia are important and cause static and dynamic deformations of the structure which result in problems of workpiece surface. The aim of the thesis work is to characterize the dynamic behavior of robots during machining operation. This work followed a three-step approach : Modeling a first model considered as a reference where the robot is at rest. Then the identification of the dynamic behavior in service. Finally, the prediction of the cutting stability using the robot dynamic model. The originality of this work is the development of new operational modal identification methods. They integrate the machining conditions and result into a more accurate model than the first model of reference without being biased by harmonics. Finally, guidlines of robot’s configurations and excitation forces’ direction are proposed to ensure the robotic machining stability
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Venkataraman, Siddharth. "Analytic, Simulation and Experimental Analysis of Fluid-Pipe Systems." Thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-249996.

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Inviscid fluid inside thin pipe system is first analytically solved for eigenfrequencies and eigenmodes using Modal Interaction Model method with fluid-structure interaction condition at boundary. Shear-diaphragm boundary condition is used for comparing and validating Analytic results with Simulation using COMSOL Multiphysics. Effect of viscosity is also compared using Newtonian fluid model. Experiment is performed using simple pipe geometry and fluid to measure transfer accelerance which is post-processed to extract cirumferential modes up to order 4; this is used to compare and validate Experiemental results with Simulation. Good correlation is obtained between Analytic, Experiment and Simulation results with n=0 breathing modes requiring modification of governing equations to incorporate compressibility effects due to changing pipe cross-section area.
En analytisk lösning för egenfrekvenser och egenmoder för en icke-viskös fluid inuti ett tunt rörsystem är först framtagen med användning av en modbaserad modell för interaktion mellan fluid och struktur som randvillkor. Idealiserad randvillkor används för att jämföra och validera analytiska resultat med simulationer i COMSOL Multiphysics. Effekten av viskositet jämförs också med hjälp av en Newtonsk fluidmodell. Experiment genomförs med simpel rörgeometri samt fluid för att mäta acceleransen som är analyserad för till att få ut mo-der i omkretsled upp till fjärde ordningen; detta i sin tur används för att jämföra och validera de experimentella resultaten med simulering-ar. Det erhålls bra korrelation mellan de analytiska-, simulerade- samt experimentella resultaten. Undantaget för n=0 grundmoder då krävs modifikation av differentialekvationerna till att inkorporera kompressibilitetseffekter
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Burkett, Jason Lee. "BENCHMARK STUDIES FOR STRUCTURAL HEALTH MONITORING USING ANALYTICAL AND EXPERIMENTAL MODELS." Master's thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2660.

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The latest bridge inventory report for the United States indicates that 25% of the highway bridges are structurally deficient or functionally obsolete. With such a large number of bridges in this condition, safety and serviceability concerns become increasingly relevant along with the associated increase in user costs and delays. Biennial inspections have proven subjective and need to be coupled with standardized non-destructive testing methods to accurately assess a bridge's condition for decision making purposes. Structural health monitoring is typically used to track and evaluate performance, symptoms of operational incidents, anomalies due to deterioration and damage during regular operation as well as after an extreme event. Dynamic testing and analysis are concepts widely used for health monitoring of existing structures. Successful health monitoring applications on real structures can be achieved by integrating experimental, analytical and information technologies on real life, operating structures. Real-life investigations must be backed up by laboratory benchmark studies. In addition, laboratory benchmark studies are critical for validating theory, concepts, and new technologies as well as creating a collaborative environment between different researchers. To implement structural health monitoring methods and technologies, a physical bridge model was developed in the UCF structures laboratory as part of this thesis research. In this study, the development and testing of the bridge model are discussed after a literature review of physical models. Different aspects of model development, with respect to the physical bridge model are outlined in terms of design considerations, instrumentation, finite element modeling, and simulating damage scenarios. Examples of promising damage detection methods were evaluated for common damage scenarios simulated on the numerical and physical models. These promising damage indices were applied and directly compared for the same experimental and numerical tests. To assess the simulated damage, indices such as modal flexibility and curvature were applied using mechanics and structural dynamics theory. Damage indices based on modal flexibility were observed to be promising as one of the primary indicators of damage that can be monitored over the service life of a structure. Finally, this thesis study will serve an international effort that has been initiated to explore bridge health monitoring methodologies under the auspices of International Association for Bridge Maintenance and Safety (IABMAS). The data generated in this thesis research will be made available to researchers as well as practitioners in the broad field of structural health monitoring through several national and international societies, associations and committees such as American Society of Civil Engineers (ASCE) Dynamics Committee, and the newly formed ASCE Structural Health Monitoring and Control Committee.
M.S.
Department of Civil and Environmental Engineering
Engineering and Computer Science
Civil Engineering
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笹岡, 竜., Ryu SASAOKA, 秀幸 畔上, Hideyuki AZEGAMI, 紀明 川上 та Noriaki KAWAKAMI. "脊柱力学模型による特発性側彎症の成因解明". 日本機械学会, 2003. http://hdl.handle.net/2237/12189.

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Altunel, Fatih. "Model Updating Of A Helicopter Structure Using A Newly Developed Correlation Improvement Technique." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12611300/index.pdf.

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Numerical model usage has substantially increased in many industries. It is the aerospace industry that numerical models play possibly the most important role for development of optimum design. However, numerical models need experimental verification. This experimental verification is used not only for validation, but also updating numerical model parameters. Verified and updated models are used to analyze a vast amount of cases that structure is anticipated to face in real life. In this thesis, structural finite element model updating of a utility helicopter fuselage was performed as a case study. Initially, experimental modal analyses were performed using modal shakers. Modal analysis of test results was carried out using LMS Test.lab software. At the same time, finite element analysis of the helicopter fuselage was performed by MSC.Patran &
Nastran software. v Initial updating was processed first for the whole helicopter fuselage then, tail of the helicopter was tried to be updated. Furthermore, a new method was proposed for the optimum node removal location for getting better Modal Assurance Criterion (MAC) matrix. This routine was tried on the helicopter case study and it showed better performance than the Coordinate Modal Assurance Criterion (coMAC) that is often used in such analyses.
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Marudachalam, Kannan. "An attempt to quantify errors in the experimental modal analysis process." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-08142009-040508/.

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Книги з теми "Experimental modal analysi"

1

Brandt, Anders. Noise and vibration analysis: Signal analysis and experimental procedures. Chichester: Wiley, 2011.

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2

Almimi, Ashraf. Split-Plot Designs: Follow-Up Experiments, Missing Observations, and Model Adequacy Checking. Saarbrucken, Germany: LAP LAMBERT Academic Publishing, 2010.

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3

Alessandro, Di Bucchianico, Läuter H, and Wynn Henry P, eds. MODA7, advances in model-oriented design and analysis: Proceedings of the 7th International Workshop on Model-Oriented Design and Analysis held in Heeze, the Netherlands, June 14-18, 2004. Heidelberg: Physica-Verlag, 2004.

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C, Pearce S., ed. A Manual of crop experimentation. London: Griffin, 1988.

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5

Atkinson, Anthony C., Luc Pronzato, and Henry P. Wynn, eds. MODA 5 — Advances in Model-Oriented Data Analysis and Experimental Design. Heidelberg: Physica-Verlag HD, 1998. http://dx.doi.org/10.1007/978-3-642-58988-1.

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6

V, Kaza K. R., and Lewis Research Center, eds. Experimental classical flutter results of a composite advanced turboprop model. Cleveland, Ohio: National Aeronautics and Space Administration, Lewis Research Center, 1986.

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7

V, Fedorov V., and Läuter H, eds. Model-oriented data analysis: Proceedings of an IIASA (International Institute for Applied Systems Analysis) Workshop on Data Analysis held at Eisenach, GDR, March 9-13, 1987. Berlin: Springer-Verlag, 1988.

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8

International, Workshop on Model-Oriented Data Analysis (6th 2001 Puchberg am Schneeberg Austria). mODa 6: Advances in model-oriented design and analysis : proceedings of the 6th International Workshop on Model-Oriented Data Analysis held in Puchberg/Schneeberg, Austria, June 25-29, 2001. Heidelberg: Physica-Verlag, 2001.

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9

C, Atkinson A., Hackl Peter, and Müller W. G, eds. mODa 6, advances in model-oriented design and analysis: Proceedings of the 6th International Workshop on Model-Oriented Data Analysis held in Puchberg/Schneeberg, Austria, June 25-29, 2001. New York: Physica-Verlag, 2001.

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10

Sharma, H. L. Experimental Designs And Survey Sampling: Methods And Applications. Udaipur, Rajasthan, India: Agrotech Publishing Academy, 2010.

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Частини книг з теми "Experimental modal analysi"

1

Sinha, Jyoti K. "Experimental Modal Analysis." In Industrial Approaches in Vibration-Based Condition Monitoring, 159–91. Boca Raton : CRC Press, 2020.: CRC Press, 2020. http://dx.doi.org/10.1201/9781315147222-8.

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Coppolino, Robert N. "Experimental Modal Analysis." In The Integrated Test Analysis Process for Structural Dynamic Systems, 85–106. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-031-79729-3_5.

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Vowinckel, Berhard, Thomas Frühwirt, Jobst Maßmann, Thomas Nagel, Mathias Nest, Daniel Ptschke, Christopher Rölke, et al. "Model-Experiment-Exercises (MEX)." In GeomInt–Mechanical Integrity of Host Rocks, 97–192. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61909-1_4.

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AbstractThe basic idea of Model-Experiment-Exercises (MEX) is to link modelling and experimental works from the very beginning i.e. in the conceptual phase. Due to the complexity of each part in the systems analysis, this combination is sometimes lost. Moreover, both models and experiments require highly sophisticated tools and equipment as well as highly specialized professionals, which also necessitate adequate measures and incentives for collaboration. GeomInt is introducing the MEX concept exactly for this purpose. Therefore, the following MEX studies occupy the largest part of the GeomInt book and feed most of the publications with research material.
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Varoto, P. S., and K. G. McConnell. "Numerically Simulated and Experimental Results for a Random Excitation." In Modal Analysis and Testing, 137–77. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4503-9_7.

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Allemang, R. J., and D. L. Brown. "Experimental Modal Analysis Methods." In Handbook of Experimental Structural Dynamics, 533–613. New York, NY: Springer New York, 2022. http://dx.doi.org/10.1007/978-1-4614-4547-0_36.

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Allemang, R. J., and D. L. Brown. "Experimental Modal Analysis Methods." In Handbook of Experimental Structural Dynamics, 1–81. New York, NY: Springer New York, 2022. http://dx.doi.org/10.1007/978-1-4939-6503-8_36-2.

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Allemang, R. J., and D. L. Brown. "Experimental Modal Analysis Methods." In Handbook of Experimental Structural Dynamics, 1–81. New York, NY: Springer New York, 2020. http://dx.doi.org/10.1007/978-1-4939-6503-8_36-1.

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8

Zhang, Bairu, and Heiko Großmann. "Functional Data Analysis in Designed Experiments." In mODa 11 - Advances in Model-Oriented Design and Analysis, 235–42. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31266-8_27.

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Schwarz, Brian, and Mark Richardson. "Proportional Damping from Experimental Data." In Topics in Modal Analysis, Volume 7, 179–86. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-6585-0_17.

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Bailey, R. A. "Design Keys for Multiphase Experiments." In mODa 11 - Advances in Model-Oriented Design and Analysis, 27–35. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31266-8_4.

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Тези доповідей конференцій з теми "Experimental modal analysi"

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Vadivasova, T. E. "Instantaneous phase dynamics and correlation analysis of spiral chaos. Experiments and a theoretical model." In EXPERIMENTAL CHAOS: 8th Experimental Chaos Conference. AIP, 2004. http://dx.doi.org/10.1063/1.1846463.

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2

Artoos, Kurt, Michael Guinchard, Andrea Catinaccio, Keith Kershaw, and Antti Onnela. "Experimental modal analysis of components of the LHC experiments." In 2007 IEEE Particle Accelerator Conference (PAC). IEEE, 2007. http://dx.doi.org/10.1109/pac.2007.4440201.

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SABINO, D., J. PEREIRA, and G. ABREU. "Output-only modal analysis using digital camera images." In Proceedings of EVACES 2013 - Experimental Vibration Analysis for Civil Engineering Structures. Recife, Brasil: Even3, 2017. http://dx.doi.org/10.29327/19083.1-1.

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4

Lin, Guochang, Huifeng Tan, and Chao Wang. "Pressure airship model structural analysis and deformation measurement using photogrammetry." In International Conference on Experimental Mechnics 2008 and Seventh Asian Conference on Experimental Mechanics, edited by Xiaoyuan He, Huimin Xie, and YiLan Kang. SPIE, 2008. http://dx.doi.org/10.1117/12.839315.

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Cano-Genoves, Carlos, Silvia Abrahão, and Emilio Insfran. "Experimental Comparison of Two Goal-oriented Analysis Techniques." In 10th International Conference on Model-Driven Engineering and Software Development. SCITEPRESS - Science and Technology Publications, 2022. http://dx.doi.org/10.5220/0010847000003119.

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Yang, Chong, Yu Fu, Jing Zhao, Hong Miao, Changchun Zhu, and Ping Zhang. "Dynamic measurement via laser interferometry: crystal growth monitoring and modal parameter analysis." In International Conference on Experimental Mechanics 2014, edited by Chenggen Quan, Kemao Qian, Anand Asundi, and Fook Siong Chau. SPIE, 2015. http://dx.doi.org/10.1117/12.2081019.

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Zhou, Suxia, Yunye Xie, Jilong Xie, and Fang Li. "Operational modal analysis of vehicle system based on SSI under operational conditions." In Fourth International Conference on Experimental Mechanics, edited by Chenggen Quan, Kemao Qian, Anand K. Asundi, and Fook S. Chau. SPIE, 2009. http://dx.doi.org/10.1117/12.851704.

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Ma, Rujian, Yantao An, and Guixi Li. "Similar Model Design and Modal Experimental Analysis of Offshore Platforms." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79058.

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Анотація:
The influence of material damping to the similar model design and experimental analysis were studied by theoretical analysis. A similar model of an offshore platform is designed and constructed on the basis of the analysis. The modal experiments have been done on the model with the method of multi-point excitation and single-point response measurement. The dynamic parameters of the model were identified including natural frequencies, structural modes and shapes. The results showed that material damping does not affect the geometry of similar model and have a little effect on the natural frequency which can be ignored. But the influence to the dynamic responses is so great that material damping must be taken into account in the analysis of experimental data. In order to facilitate the application, the transformation relations of damping ratio and the damping factor are given in this paper. The comparison between experimental results the simulation results indicates the consistency of design and construction of the similar model and reliability of the experimental data.
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Howell, Geoffrey, Janice M. Dulieu-Barton, Mithila Achintha, and Andrew F. Robinson. "A stress-free model for residual stress assessment using thermoelastic stress analysis." In International Conference on Experimental Mechanics 2014, edited by Chenggen Quan, Kemao Qian, Anand Asundi, and Fook Siong Chau. SPIE, 2015. http://dx.doi.org/10.1117/12.2083020.

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Benhenda, Rafik Sadek, Djilali Boutchicha, and Mokhtaria Miri. "Numerical model calibrated on an experimental modal analysis of cortical bone." In 2016 8th International Conference on Modelling, Identification and Control (ICMIC). IEEE, 2016. http://dx.doi.org/10.1109/icmic.2016.7804257.

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Звіти організацій з теми "Experimental modal analysi"

1

Liu, Lu, Wenchuan Qi, Qian Zeng, Ziyang Zhou, Daohong Chen, Lei Gao, Bin He, Dingjun Cai, and Ling Zhao. Does acupuncture improve lung function in chronic obstructive pulmonary disease animal model?: a systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, March 2022. http://dx.doi.org/10.37766/inplasy2022.3.0104.

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Анотація:
Review question / Objective: Chronic obstructive pulmonary disease (COPD) is a common, preventable, and treatable disease characterized by persistent respiratory symptoms and progressive airflow obstruction documented on spirometry. Acupuncture, as a safe and economical non-pharmacology therapy, has pronounced therapeutic effects in COPD patients. Several systematic reviews draw the conclusion that acupuncture could improve patients’ quality of life, exercise capacity and dyspnoea, however, the results about lung function were inconclusive. Recently, increasing number of animal studies has been published to illustrate the effects of acupuncture in improving lung function in COPD animal model. However, the efficacy of acupuncture for experimentally induced COPD have not been systematically investigated yet. A systematic review of animal experiments can benefit future experimental designs, promote the conduct and report of basic researches and provide some guidance to translate the achievements of basic researches to clinical application in acupuncture for COPD. Therefore, we will conduct this systematic review and meta-analysis to evaluate effects of acupuncture on COPD animal model.
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Candy, J. V., L. M. Stoops, S. N. Franco, and M. C. Emmons. MODAL FREQUENCY TRACKING: Performance Analysis on Noisy Experimental Ground Test Data. Office of Scientific and Technical Information (OSTI), January 2018. http://dx.doi.org/10.2172/1438608.

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Allemang, Randall J., and David L. Brown. Experimental Modal Analysis and Dynamic Component Synthesis. Volume 5. Universal File Formats. Fort Belvoir, VA: Defense Technical Information Center, December 1987. http://dx.doi.org/10.21236/ada197032.

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Allemang, Randall J., and David L. Brown. Experimental Modal Analysis and Dynamic Component Synthesis. Volume 1. Summary of Technical Work. Fort Belvoir, VA: Defense Technical Information Center, December 1987. http://dx.doi.org/10.21236/ada207270.

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5

Ratcliffe, Colin P. Experimental Modal Analysis of a Sandwich Construction, Glass Reinforced Plastic Composite Deck Panel. Fort Belvoir, VA: Defense Technical Information Center, July 1996. http://dx.doi.org/10.21236/ada359147.

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6

Remy, Elisabeth, Florent Gasparin, and Alexandre Mignot. Analysis of the physical and BGC design experiments. EuroSea, 2022. http://dx.doi.org/10.3289/eurosea_d2.2.

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Sparks, Paul, Jesse Sherburn, William Heard, and Brett Williams. Penetration modeling of ultra‐high performance concrete using multiscale meshfree methods. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41963.

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Terminal ballistics of concrete is of extreme importance to the military and civil communities. Over the past few decades, ultra‐high performance concrete (UHPC) has been developed for various applications in the design of protective structures because UHPC has an enhanced ballistic resistance over conventional strength concrete. Developing predictive numerical models of UHPC subjected to penetration is critical in understanding the material's enhanced performance. This study employs the advanced fundamental concrete (AFC) model, and it runs inside the reproducing kernel particle method (RKPM)‐based code known as the nonlinear meshfree analysis program (NMAP). NMAP is advantageous for modeling impact and penetration problems that exhibit extreme deformation and material fragmentation. A comprehensive experimental study was conducted to characterize the UHPC. The investigation consisted of fracture toughness testing, the utilization of nondestructive microcomputed tomography analysis, and projectile penetration shots on the UHPC targets. To improve the accuracy of the model, a new scaled damage evolution law (SDEL) is employed within the microcrack informed damage model. During the homogenized macroscopic calculation, the corresponding microscopic cell needs to be dimensionally equivalent to the mesh dimension when the partial differential equation becomes ill posed and strain softening ensues. Results of numerical investigations will be compared with results of penetration experiments.
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Kravtsov, Hennadiy M., та Olga O. Gnedkova. Методи використання хмарних сервісів у навчанні іноземної мови. [б. в.], серпень 2018. http://dx.doi.org/10.31812/0564/2456.

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Research goals: determine particularities of using cloud services in English communicative competence forming process and develop the model of distance learning system (DLS) and cloud services interaction that improves the quality of the learning process. Research objectives: to identify, describe and develop methodological features of the model of distance learning system and cloud services interaction; consider on the examples the methods of use cloud services in DLS in foreign language training, aimed at English communicative competence forming process of students; experimentally investigate the level of using of cloud services in distance learning and identify ways of improving its use. Object of research: methodical system of foreign language students’ training of language faculties in high institutions. Subject of research: methodological model of the model of distance learning system and cloud services interaction in English communicative competence forming process. Research methods used: review and analysis of scientific publications, psychological, educational and instructional materials, modeling of complex systems, questionnaires, conducting pedagogical experiment. Results of the research. The model of distance learning system and cloud services interaction was developed and the methodological particularities of this interaction are defined. Methods of using cloud services on the example of the distance course “Practical English Course Upper Intermediate” describing the methods of doing the tasks in English communicative competence forming process of language faculties were considered. As a result of experiment it was found there is a low level of use of cloud technologies in distance learning is a consequence of a lack of awareness of teachers in the possibilities of its use. The main conclusions and recommendations: 1) the use of cloud technologies in distance learning of foreign language will improve the quality of training of students of language faculties of high institutions; 2) it is reasonable to conduct work in familiarization and training university lecturers using cloud services in professional and educational activities.
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De Nardo, G. User Defined Data in the New Analysis Model of the BaBar Experiment. Office of Scientific and Technical Information (OSTI), April 2005. http://dx.doi.org/10.2172/839837.

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Sundberg, David W., Alexander L. Brown, and Thomas K. Blanchat. Well-characterized open pool experiment data and analysis for model validation and development. Office of Scientific and Technical Information (OSTI), December 2006. http://dx.doi.org/10.2172/899722.

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