Дисертації з теми "Multifunctional structure"
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Hilton, Corydon. "Development and Analysis of a Multifunctional Fuel Cell Structure." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/29321.
Повний текст джерелаPh. D.
Bhatti, Wasim. "Mechanical integration of a PEM fuel cell for a multifunctional aerospace structure." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/21513.
Повний текст джерелаCAPOVILLA, GIORGIO. "Development of next generation multifunctional composite structures for CubeSats, pico- and nanosatellites." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2971315.
Повний текст джерелаMoakes, Richard John Asa. "Whey protein micro-particles as multifunctional materials for structure and delivery." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8160/.
Повний текст джерелаOgbomo, Sunny Minister. "Processing, structure property relationships in polymer layer double hydroxide multifunctional nanocomposites." Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc12174/.
Повний текст джерелаOgbomo, Sunny Minister D'Souza Nandika Anne. "Processing, structure property relationships in polymer layer double hydroxide multifunctional nanocomposites." [Denton, Tex.] : University of North Texas, 2009. http://digital.library.unt.edu/ark:/67531/metadc12174.
Повний текст джерелаMandlekar, Neeraj Kumar. "Integration of wood waste to develop multifunctional fully biobased textile structure." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1I062/document.
Повний текст джерелаIt has been chosen to study valorization of low-cost industrial lignin as additive in designing the flame retardant (FR) system for polyamide 11 (PA) to develop biobased textile structure. The main focus of this thesis work is to consider lignin as carbon source and introduce in a textile structure in combination with phosphinate salt (FR agent). In the primary study, chemically different industrial lignins were incorporated in PA by extrusion to investigate the charring and fire retardant behaviour of the prepared binary blends. In addition, the introduction of sulphonated lignins significantly reduced the peak of the heat release rate (PHRR) and of the total heat release (THR), and a noticeable increase of the char residue was observed after forced combustion test. In the next approach, lignin was exploited as carbon source in combination with commercially available phosphinate FR (i.e., ZnP and AlP). To achieve this objective, a preliminary study carried out with laboratory grade lignin (LS) combined with ZnP to investigate the thermal stability and fire performance as well as the possible synergy between lignin and ZnP and with the polymer matrix. The results obtained in this study permitted to continue further, the practical implementation of lignin and multifilament production. In the next step, flame retarded blends were developed with direct addition of low-cost industrial lignins (LL and DL) with phosphinate FR. For the systematic understanding, various FR formulations were developed by varying the lignin and FR loading and characterized. Thermal decomposition analysis showed that the presence of lignin decreases the initial decomposition temperature (T5%) due to the decomposition of lignin which starts at a lower temperature region with the evolution of less thermally stable compounds and the maximum decomposition temperature (Tmax) shifts to higher temperature region, at this stage the formation of phenolic, carbonyls, hydrocarbons and CO2 along with phosphinate compounds occurs. Meanwhile, in the condensed phase thermally stable aromatic charred layer is formed because of lignin decomposition and phosphate compounds formation due to the presence of phosphinate metal salt. A higher amount of char residue is obtained when LL combined with ZnP/AlP as compared to the DL and ZnP/AlP blends. It is assumed that, during decomposition of LL, the sulfonate compounds release SO2 and transformed into thermally stable Na2SO4, hence giving rise to the stable char residue. The fire properties were assessed by cone calorimeter tests revealed the combination of lignin and phosphinate FR significantly reduced the PHRR and other fire-related parameters due to the formation of a protective char layer. The presence of lignin not only improve fire retardancy but also reduced the evolution of carbon monoxide (CO). More enhanced fire retardant properties were obtained with LL and ZnP/AlP combination reaches to 10 wt% in ternary blends, which not only promotes char formation but also confer the stability to char in the condensed phase. Furthermore, the most enhanced forced combustion results were obtained with LL and AlP (in particular, PA80-LL10-AlP10). Multifilament yarns were successfully produced for PA-DL-ZnP and PA-LL-ZnP combinations. However, the blends of AlP with lignin were not spinnable because of low compatibility and dispersion level of AlP in the polymer. Optical microscopy and tensile tests were performed to study the physical properties of multifilaments. A double layer (interlock structure) knitted fabrics were developed to evaluate fire behaviour analysis on fabric samples
Ylianttila, M. (Mari). "Structure-function studies of the peroxisomal multifunctional enzyme type 2 (MFE-2)." Doctoral thesis, University of Oulu, 2005. http://urn.fi/urn:isbn:9514278968.
Повний текст джерелаSikora, Aneta E. "Structure-function analysis of a multifunctional enzyme using the atomic force microscope." Thesis, University of Portsmouth, 2010. https://researchportal.port.ac.uk/portal/en/theses/structurefunction-analysis-of-a-multifunctional-enzyme-using-the-atomic-force-microscope(fdbd2065-c230-4eba-a7cd-94cbb1bb9e16).html.
Повний текст джерелаDunn, Christopher Thomas 1971. "The design, analysis, construction, and testing of a multifunctional composite satellite structure." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9243.
Повний текст джерелаAlso available online at the MIT Theses Online homepage
Includes bibliographical references (leaves 290-294).
A small space based telescope is being designed by the Charles Stark Draper Laboratory, Inc. in conjunction with MIT. The design goal of this project is to use existing technology to gather ground data from low earth orbit at a minimal cost. A structure was constructed at MIT that allows the satellite to survive launch loads and maintains the optical stability of the satellite. The structure is a double hull design constructed of AS4/3501-6 graphite epoxy with a zero coefficient of thermal expansion lay-up to prevent defocussing of the optics due to thermal loading. The overall design goal at MIT is to construct a space worthy structure. This thesis includes the preliminary design of the inner structure that houses the optics for the telescope. Design of the outer structure, the connections between the inner and the outer structure and detailed design of the inner structure are not included in this work. The analytical techniques used in this project included thermal analyses of structures in various earth orbits, determination of structural requirements from optical performance calculations, designing of near zero Coefficient of Thermal Expansion (CTE) laminates, consideration of manufacturing and material variations in design, strength analysis of composite laminates, and determination of vibration modes and associated frequencies of tubular structures with anisotropic sandwich construction. Experimental work included the building of co-cured honeycomb panels, curved panels, and tubular sections to verify the structure as designed was manufacturable. These efforts culminated in the production of a space-worthy component. Testing was preformed to verify the analysis and design. Testing included flatwise tension testing to verify integrity of the honeycomb bonding, tensile testing to verify stiffness calculations and experimentally determine the failure load for the desired lay-up, and testing to verify the CTE was within acceptable bounds to prevent the optics from defocussing.
by Christopher Thomas Dunn.
S.M.
ZEMINIANI, ELEONORA. "Sistemi multifunzionali integrati (Integrated multifunctional systems)." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2507790.
Повний текст джерелаHaapalainen, A. (Antti). "Structure-function studies of the mammalian peroxisomal multifunctional enzyme type 2 (MFE-2)." Doctoral thesis, University of Oulu, 2002. http://urn.fi/urn:isbn:9514268385.
Повний текст джерелаRoberts, Samuel Charles. "An investigation of the feasibility of a spacecraft multifunctional structure using commercial electrochemical cells." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/67387/.
Повний текст джерелаBruzzi, Davide. "ALMASat-1, ALMASat-EO and beyond: evolution of structural concepts and technologies towards multifunctional structures for microsatellites." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6999/.
Повний текст джерелаYan, Haile. "Crystal structure, martensitic transformation crystallography, mechanical and magnetocaloric performance of Ni(Co)MnIn multifunctional alloys." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0105/document.
Повний текст джерелаNi-Mn-In based alloys have attracted considerable attention due to their multifunctional properties since its discovery in 2004, such as metamagnetic shape memory effect (MMSME), magnetocaloric effect (MCE) and magnetoresistance (MR) effect. However, some fundenmental knowledge on these alloys is still missing until now, such as crystal structure of martensite, crystallographic features of microstructure and magnetostructural transition. In this dissertation, the crystallographic features, mechanical behaviors and magnetic properties of Ni-Mn-In based alloys were studied theoretically and experimentally. First, the crystal structures of Ni-Mn-In alloys were accurately determined by Rietveld method in the frame of superspace theory (Chapter 3). Then, the microstructure of martensite (Chapter 4), such as variant organization and interface structure, and the crystallographic features of martensitic transformation, such as orientation relationship (OR), transformation strain path and geometrical compatibility between austenite and martensite, were systematically studied (Chapter 5). Finally, with this fundamental knowledge on Ni-Mn-In alloys, the behaviors and mechanisms of martensite variant rearrangement/ selection under two kinds of mechanical loading strategies, i.e. loading at martensite state and loading across the structural transition, and the effects of annealing on MCE and its related hysteresis loss were explored (Chapter 6). The main results are as follows. The modulated martensite has an incommensurate 6M crystal structure with superspace group I2/m(α0γ)00 that can be approximated by a three-fold superstructure model in the three-dimensional space. The microstructure of martensite is in plate shape and self-organized in colonies. Each colony has four distinct orientation variants. The maximum of 6 distinct colonies and 24 variants can be generated within one austenite grain. Although as many as 14 kinds of twin relations are suggested in the frame of crystallographic theories of martensitic transformation, only three types of twin relations are generally detected, i.e. type-I, type-II and compound twin. Variant interfaces are defined by their corresponding twinning plane K1 at mesoscopic scale. However, at atomic scale, the type-I twin has a coherent interface, whereas type-II and compound twins have “stepped” interfaces. Both the K-S and Pitsch ORs are appropriate to describe the lattice correspondence between austenite and martensite in Ni-Mn-In alloys. However, the strain path related to the Pitsch relation is evidenced to be the effective for the structural distortion. With the determined transformation path, the underlying mechanism of variant organization is revealed. Across the martensitic transformation, despite the existence of a relative wide stressed layer (around 20 nm), the habit plane is bordered by single martensite variant with austenite rather than the generally observed “sandwich-like” structure, implying a relative good geometrical compatibility between the corresponding phases. For compressive loading at martensite, variant arrangement is realized by the detwinning process. It is evidenced that a single variant state in some colonies can be obtained when the loading orientation is located in the common positive Schmid factor (SF) zone of the three detwinning systems. For loading across the structural transition, the prestrain is obtained by variant selection in which the number of colonies is significantly reduced and the variant organization within colony is greatly changed. The SF for transformation strain path is introduced to evaluate the possible selection of variants. Heat treatment can significantly enhance the magnetic entropy change ΔSM but simultaneously increase the magnetic hysteresis loss. For ΔSM, the chemical ordered degree should play a prominent role [...]
Jain, Tanmay. "Design, Characterization, and Structure - Property Relationships of Multifunctional Polyesters for Extrusion-Based Direct-Write 3D Printing." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1586874036561737.
Повний текст джерелаKiema, T. R. (Tiila-Riikka). "Studies on the peroxisomal multifunctional enzyme type-1:domain structure with special reference to the hydratase/isomerase fold." Doctoral thesis, University of Oulu, 2001. http://urn.fi/urn:isbn:9514265777.
Повний текст джерелаFriedemann, Ariane [Verfasser], Thorsten [Akademischer Betreuer] Gesing, Günter [Gutachter] Schmitt, and Herbert [Gutachter] Juling. "Preparation and structure elucidation of multifunctional porous TiO2 surfaces by means of plasma electrolytic oxidation / Ariane Friedemann ; Gutachter: Günter Schmitt, Herbert Juling ; Betreuer: Thorsten Gesing." Bremen : Staats- und Universitätsbibliothek Bremen, 2018. http://d-nb.info/1160030588/34.
Повний текст джерелаVashchuk, Alina. "Synthèse, structure et propriétés de polycyanurates réticulés et de matériaux nanoporeux générés en utilisant des liquides ioniques." Thesis, Paris Est, 2019. http://www.theses.fr/2019PESC0046/document.
Повний текст джерелаThis PhD thesis addresses new designs of cyanate ester resin (CER) films in the presence of ionic liquids as multifunctional agents: catalysts, reactive modifiers, fillers or porogens. It should be emphasized that ionic liquids (ILs) of varying structures and concentrations significantly accelerate the polycyclotrimerization of dicyanate ester of bisphenol E, in the absence of any additional organic solvent or additive. The resulting polycyanurate networks doped with aprotic ionic liquids can be promising materials for producing photosensitive structures. Such nanocomposite systems allow for easier separation, recovery, and recycling of ILs by mere extraction, which eventually affords thermally stable nanoporous films. The porosity features of these materials depend on the concentration of ILs in the CER precursors.Protic ILs containing functional >NH and -OH groups, regardless of molar mass, chemical structure of cation and anion, chemically incorporate into the polycyanurate network, thus the resulting hybrid materials with fragments of ionic liquids could provide excellent candidates for future research in ionomers and nanocomposites
Simões, Fábio José Ferreira. "Novas centralidades multifuncionais na frente ribeirinha do Seixal. Intervencões urbanísticas de suporte e consolidação a redes ecológicas de âmbito metropolitano." Master's thesis, Faculdade de Arquitetura de Lisboa, 2012. http://hdl.handle.net/10400.5/5796.
Повний текст джерелаBeckman, Lisa. "Grönytans betydelse i Sundbybergs stad : ur ett planerarperspektiv och ett invånarperspektiv." Thesis, Umeå universitet, Institutionen för geografi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-172132.
Повний текст джерелаAli, Samer. "Concept innovant d'échangeur/réacteur multifonctionnel par contrôle dynamique passif par générateurs de vorticité flexibles." Thesis, Valenciennes, 2015. http://www.theses.fr/2015VALE0034/document.
Повний текст джерелаThe aim of this study is to investigate the use of fluid-structure interaction (FSI) to improve heat transfer and mixing performances in multi-functional heat exchangers/reactors, and to evaluate configuration designs where the main target is to produce and maintain self-sustained oscillations of flexible vortex generators. At first, two dimensional laminar flow studies are numerically investigated. The results show that a minimum of three alternating flaps is needed to produce an instability that leads to large displacement oscillations. However, the introduction of two co-planar flaps upstream destabilizes the flow by creating periodic forces that act on the alternating downstream flaps. Hence, this results in artificially increasing the reduced velocity that will induce the alternating flaps to be in a lock-in state. Thus in this case, large displacement amplitudes are created with two alternating flaps only. The free flaps oscillations produce vortices of higher strength which have a positive impact on heat transfer and mixing. Secondly, a three dimensional HEV configuration with flexible trapezoidal vortex generators inclined with an angle of 45◦ with respect to the wall and reversed opposite to the flow direction is numerically investigated. Fast Fourier Transformation is applied on the temporal variation of the Proper Orthogonal Decomposition (POD) coefficientswhich displays a dominant peak in the flow and corresponds to the vortices periodic formation and detachment. This dominant frequency synchronizes well with the structural oscillation frequency and the fundamental frequency of the tabs reaching a lock-in state and leading to large oscillation amplitudes
Seifert, David Ryan. "Topology Optimization of Multifunctional Nanocomposite Structures." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/86195.
Повний текст джерелаPh. D.
This dissertation presents a method that allows for the best placement of a limited amount of filler material within a base matrix material to form an optimal composite structure. Adding filler material, in this case Carbon Nanotubes, can change the effective behavior of the composite structure, enhancing the capabilities of the base matrix material by adding structural stiffness, electrical conductivity, and even the ability for the structure to measure its own strains. The degree to which these changes occur is dependent on the amount of filler material present in any given subsection of the structure. The method then is focused on determining how much of the filler to place in different subsections of the structure to maximize several measures of performance. These measures pertain to structural performance, electrical conductivity, and the structure’s ability to sense strains. Steps are taken within the method to remove non-physical designs and also to find the overall best design, called the global minima. The method is applied to several test structures of varying complexity, and it is shown that the optimization method can heavily influence performance by tailoring the filler material distribution. Further electrical and sensing performance gains can be obtained by properly selecting where the electrodes are located on the structure. This is demonstrated by including electrode placement in the design method along with the filler distribution.
Chillara, Venkata Siva Chaithanya. "Multifunctional Laminated Composites for Morphing Structures." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524104865278235.
Повний текст джерелаOgnibene, Giulia. "Multifunctional nanocomposites obtained by hierarchical structures." Doctoral thesis, Università di Catania, 2017. http://hdl.handle.net/10761/3980.
Повний текст джерелаFoster, James A. "Thermal management of multifunctional spacecraft power structures." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/181505/.
Повний текст джерелаSchwingshackl, Christoph Wolfgang. "Dynamic behaviour of inhomogeneous multifunctional power structures." Thesis, University of Southampton, 2006. https://eprints.soton.ac.uk/52007/.
Повний текст джерелаLi, Yingjie. "Structures, properties and applications of multifunctional lignin nanofibres." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54038.
Повний текст джерелаApplied Science, Faculty of
Materials Engineering, Department of
Graduate
Palma, Giuseppina <1989>. "Numerical modelling and structural optimization of multifunctional maritime structures aimed to protect harbours and produce energy." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amsdottorato.unibo.it/9192/1/PhD_Palma.pdf.
Повний текст джерелаVaňková, Ivana. "Polyfunkční dům." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265651.
Повний текст джерелаFan, Xiaolei. "Selective catalytic hydrogenation in a structured compact multifunctional reactor." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.519009.
Повний текст джерелаNarayanan, Vindhya. "Non-equilibrium Thermomechanics of Multifunctional Energetic Structural Materials." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7570.
Повний текст джерелаMartínek, David. "Nosná konstrukce polyfunkčního domu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372151.
Повний текст джерелаSong, Yi. "Multifunctional Composites Using Carbon Nanotube Fiber Materials." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1353156345.
Повний текст джерелаAmirkhizi, Alireza Vakil. "Multifunctional composites and structures with integrated mechanical and electromagnetic properties." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3237550.
Повний текст джерелаTitle from first page of PDF file (viewed December 12, 2006). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
Berglin, Lena. "Interactive Textile Structures : Creating Multifunctional Textiles based on Smart Materials." Doctoral thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-3490.
Повний текст джерелаBall, Jeffrey Craig. "Design and analysis of multifunctional composite structures for nano-satellites." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2572.
Повний текст джерелаThe aim of this thesis is to investigate the applications of multifunctional compos- ite (MFC) technology to nano-satellite structures and to produce a working concept design, which can be implemented on future Cube-Satellites (CubeSats). MFC tech- nologies can be used to optimise the performance of the satellite structure in terms of mass, volume and the protection it provides. The optimisation of the structure will allow further room for other sub-systems to be expanded and greater payload allowance. An extensive literature view of existing applications of MFC materials has been conducted, along with the analysis of a MFC CubeSat structural design account- ing for the environmental conditions in space and well-known design practices used in the space industry. Numerical analysis data has been supported by empirical analysis that was done where possible on the concept material and structure. The ndings indicate that the MFC technology shows an improvement over the conventional alu- minium structures that are currently being used. Improvements in rigidity, mass and internal volume were observed. Additional functions that the MFC structure o ers include electrical circuitry and connections through the material itself, as well as an increase electromagnetic shielding capability through the use of carbon- bre composite materials. Empirical data collected on the MFC samples also show good support for the numerical analysis results. The main conclusion to be drawn from this work is that multifunctional composite materials can indeed be used for nano-satellite structures and in the same light, can be tailor-made to the speci c mission requirements of the satellite. The technology is in its infancy still and has vast room for improvement and technological development beyond this work and well into the future. Further improvements and additional functions can be added through the inclusion of various other materials.
Pinto, Fulvio. "Smart multifunctional composite materials for improvement of structural and non-structural properties." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.589651.
Повний текст джерелаBrocklehurst, Simon Mark. "Three-dimensional structural studies on domains of multifunctional proteins." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339734.
Повний текст джерелаEvrard, Quentin. "Multifunctional layered simple hydroxides : structural investigations, functionalization and properties." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAE007/document.
Повний текст джерелаThe main goal of this thesis is to obtain multiferroic materials via the intercalation of organic molecules in a magnetic inorganic matrix made of layered simple hydroxide. The possibility to use phosphonic acid as grafting moiety for the functionalization of layered simple hydroxides has been demonstrated during this thesis. Pre-functionalization techniques has allowed the functionalization of layered simple hydroxides of copper and cobalt with a wide variety of molecules (fluorenes, benzenes, thiophenes or transition- metal complexes) to bring an additional property to the magnetic properties of the layered hydroxide. The first measurements revealed a coupling between magnetic ordering temperature and dielectric anomaly. The dielectric properties measurements proved to be difficult with the samples (on cold-pressed pellets) and shown the usefulness of developing new methods to improve the cristallite size. To that end, new syntheses procedures led to the obtention of mono crystals of copper-hydroxidodecylsulfonate allowing to get additional structural informations
Šmídová, Eva. "Obytný soubor Brno - Červený kopec." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225813.
Повний текст джерелаRačko, Valentín. "Intenzivní dům v Brně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-394026.
Повний текст джерелаWang, Shuang [Verfasser]. "Amphiphilic carbohydrate-containing compounds for multifunctional nano/macro structures / Shuang Wang." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/1230628304/34.
Повний текст джерелаMeng, Han. "Acoustic properties of novel multifunctional sandwich structures and porous absorbing materials." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEC008/document.
Повний текст джерелаImplementation of acoustic materials is an effective and popular noise reduction method during propagation. Acoustic properties of novel multifunctional sandwich structures and porous absorbing materials are studied in the dissertation. The main contributions of the dissertation are given as, Sandwich panels generally have excellent mechanical properties and good sound transmission loss (STL), but no sound absorption ability. Novel multifunctional sandwich structures are developed by integrating micro perforations and porous absorbing materials to the conventional structurally-efficient corrugated and honeycomb sandwich panels to achieve good SAC and STL at low frequencies. Low frequency sound absorption and sound transmission loss (STL) of corrugated sandwich panels with different perforation configurations are evaluated both numerically and experimentally. Finite element (FE) models are constructed with considerations of acousticstructure interactions and viscous and thermal energy dissipations inside the perforations. The validity of FE calculations is checked against experimental measurements with the tested samples provided by additive manufacturing. Compared with the classical corrugated sandwich panels without perforation, the perforated corrugated sandwich panels (PCSPs) with perforations in its face plate not only exhibits a higher SAC at low frequencies but also a better STL as a consequence of the enlarged SAC. The enlargement of SAC and STL should be attributed to the acoustical resonance induced by the micro perforations. It is also found that the PCSPs with perforations in both the face plates and corrugated cores have the lowest resonance frequencies of all the PCSPs. Besides, the acoustic properties of honeycomb sandwich panels with microperforated faceplate are also explored. An analytical model is presented with the assumption that displacements of the two faceplates are identical at frequencies below the faceplate resonance frequency. The analytical model is subsequently verified by finite element models and existing experimental results. Unlike classical honeycomb sandwich panels which are poor sound absorbers, perforated honeycomb sandwiches (PHSPs) lead to high SAC at low frequencies, which in turn brings about increment in the low frequency STL. Influences of core configuration are investigated by comparing PHSPs with different honeycomb core configurations. In order to enlarge the SAC bandwidth of perforated sandwich panels, porous absorbing materials are added to the cores of novel perforated sandwich panels. FE models are set up to estimate the SAC and STL of perforated sandwich panels with porous materials. Results show that perforated sandwich panels with porous material can provide SAC with broader bandwidth and lower resonance frequency than that without porous materials. Whereas the peak values in the SAC and STL curves are reduced due to the weakened acoustical resonance by the porous materials. […]
Maňásková, Kristýna. "Polyfunkční dům v Uherském Hradišti." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226660.
Повний текст джерелаBenák, Dalibor. "Stavebně-technologický projekt polyfunkčního domu v Brně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226997.
Повний текст джерелаŠaár, Martin. "Polyfunkční dům v řadové zástavbě." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265644.
Повний текст джерелаDeng, Yinhu. "Bio-inspired Multifunctional Coatings and Composite Interphases." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-212223.
Повний текст джерелаYang, Heejae Ko Frank K. "Fabrication and characterization of multifunctional nanofiber nanocomposite structures through co-electrospinning process /." Philadelphia, Pa. : Drexel University, 2007. http://hdl.handle.net/1860/1782.
Повний текст джерелаDanner, Ann-Kathrin Maria [Verfasser]. "Multifunctional Amphiphilic Polyethers: From Polyether Lipids to Tapered Structures / Ann-Kathrin Maria Danner." Mainz : Universitätsbibliothek Mainz, 2019. http://d-nb.info/1196133859/34.
Повний текст джерела