Academic literature on the topic 'Vibrational behaviour'

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Journal articles on the topic "Vibrational behaviour"

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Trampenau, J., K. Bauszus, W. Petry, and U. Herr. "Vibrational behaviour of nanocrystalline Ni." Nanostructured Materials 6, no. 5-8 (January 1995): 551–54. http://dx.doi.org/10.1016/0965-9773(95)00118-2.

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Brivio, Gian Paolo. "Chaotic behaviour in vibrational predesorption." Journal of Electron Spectroscopy and Related Phenomena 64-65 (December 1993): 555–62. http://dx.doi.org/10.1016/0368-2048(93)80121-2.

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Georgiev, Zlatin, and Lilo Kunchev. "Study of the vibrational behaviour of the components of a car suspension." MATEC Web of Conferences 234 (2018): 02005. http://dx.doi.org/10.1051/matecconf/201823402005.

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The paper presents a study of the vibrational behaviour of a car suspension in the frequency range from 50 to 200 Hz. The vehicle has a torsion spring suspension. The aim of the study is to provide a numerical approach, which evaluates the impact of the tyre vibration characteristics and the elastic properties of suspension elements on the vibrational behaviour of the “tyre-suspension-body” system. The object of the study are the elements of the suspension – stub-axle, upper and lower suspension arms, strut rod, torsion bar and others. The suspension is equipped with pneumatic tyres with different vibration characteristics. Laboratory experiments are done. The tyre contact patch is disturbed by harmonic force. The accelerations of the wheel axle and specific points of the suspension are obtained. A numerical model of the system is created by using the Finite Element Method available in SolidWorks Simulation software. The model allows to determinate the accelerations at different points of the suspension. The results of the experimental and theoretical studies are compared. The values obtained in the two studies are similar.
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Rieckmann, Marianne, James L. Park, John Codrington, and Ben Cazzolato. "Modelling the three-dimensional vibration of composite archery arrows under free–free boundary conditions." Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology 226, no. 2 (April 3, 2012): 114–22. http://dx.doi.org/10.1177/1754337112442273.

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Archery performance has been shown to be dependent on the resonance frequencies and operational deflection shape of the arrows. This vibrational behaviour is influenced by the design and material of the arrow and the presence of damage in the arrow structure. In recent years arrow design has progressed to use lightweight and stiff composite materials. This paper investigates the vibration of composite archery arrows through a finite difference model based on Euler–Bernoulli theory, and a three-dimensional finite element modal analysis. Results from the numerical simulations are compared to experimental measurements using a Polytec scanning laser Doppler vibrometer (PSV-400). The experiments use an acoustically coupled vibration actuator to excite the composite arrow with free–free boundary conditions. Evaluation of the vibrational behaviour shows good agreement between the theoretical models and the experiments.
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Planes, A., Ll Mañosa, and E. Vives. "Vibrational Behaviour of Cu-Based BCC Alloys." Journal de Physique IV 05, no. C8 (December 1995): C8–829—C8–834. http://dx.doi.org/10.1051/jp4/199558829.

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Frick, B., J. Williams, S. Treviño, and R. Erwin. "Vibrational behaviour of amorphous and crystalline ethylbenzene." Physica B: Condensed Matter 213-214 (August 1995): 506–9. http://dx.doi.org/10.1016/0921-4526(95)00194-e.

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Palopoli, C. M., S. B. Etcheverry, and E. J. Baran. "Vibrational and thermal behaviour of nicotinium dichromate." Thermochimica Acta 131 (August 1988): 273–77. http://dx.doi.org/10.1016/0040-6031(88)80080-7.

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Rebillard, E., and J. L. Guyader. "VIBRATIONAL BEHAVIOUR OF LATTICES OF PLATES: BASIC BEHAVIOUR AND HYPERSENSITIVITY PHENOMENA." Journal of Sound and Vibration 205, no. 3 (August 1997): 337–54. http://dx.doi.org/10.1006/jsvi.1997.1055.

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Nieh, J. C., and J. Tautz. "Behaviour-locked signal analysis reveals weak 200–300 Hz comb vibrations during the honeybee waggle dance." Journal of Experimental Biology 203, no. 10 (May 15, 2000): 1573–79. http://dx.doi.org/10.1242/jeb.203.10.1573.

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Waggle-dancing honeybees produce vibratory movements that may facilitate communication by indicating the location of the waggle dancer. However, an important component of these vibrations has never been previously detected in the comb. We developed a method of fine-scale behavioural analysis that allowed us to analyze separately comb vibrations near a honeybee waggle dancer during the waggle and return phases of her dance. We simultaneously recorded honeybee waggle dances using digital video and laser-Doppler vibrometry, and performed a behaviour-locked Fast Fourier Transform analysis on the substratum vibrations. This analysis revealed significantly higher-amplitude 200–300 Hz vibrations during the waggle phase than during the return phase (P=0.012). We found no significant differences in the flanking frequency regions between 100–200 Hz (P=0.227) and 300–400 Hz (P=0.065). We recorded peak waggle phase vibrations from 206 to 292 Hz (244+/−28 Hz; mean +/− s. d., N=11). The maximum measured signal - noise level was +12.4 dB during the waggle phase (mean +5.8+/−2.7 dB). The maximum vibrational velocity, calculated from a filtered signal, was 128 microm s(−)(1) peak-to-peak, corresponding to a displacement of 0.09 microm peak-to-peak at 223 Hz. On average, we measured a vibrational velocity of 79+/−28 microm s(−)(1) peak-to-peak from filtered signals. These signal amplitudes overlap with the detection threshold of the honeybee subgenual organ.
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Simon, G. "Prediction of Vibration Behaviour of Large Turbo-Machinery on Elastic Foundations Due to Unbalance and Coupling Misalignment." Proceedings of the Institution of Mechanical Engineers, Part C: Mechanical Engineering Science 206, no. 1 (January 1992): 29–39. http://dx.doi.org/10.1243/pime_proc_1992_206_092_02.

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A computational assessment of the vibrational behaviour of turbo-sets on elastic foundations is of significance with regard to the design and optimization of the complete installation. Using modern computer programs, for example, MADYN, and refined modelling techniques, the natural and response behaviour of even large systems can be calculated reliably, but there does remain some uncertainty, especially with regard to vibration excitement. The present contribution develops possibilities of how to handle these problems.
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Dissertations / Theses on the topic "Vibrational behaviour"

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Fletcher, Patrick Alan. "High pressure vibrational and EXAFS spectroscopy." Thesis, University of Leicester, 1987. http://hdl.handle.net/2381/33673.

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Deni, Mohd Salleh Mohd. "Vibrational anharmonicity and the elastic behaviour of some antiferromagnetic materials." Thesis, University of Bath, 1988. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380942.

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Pollet, Didier Michel. "A study of low force fabric characteristics and vibrational behaviour for automated garment handling." Thesis, University of Hull, 1998. http://hydra.hull.ac.uk/resources/hull:11092.

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One of the fundamental concepts in automated garment assembly is that the orientation of a fabric panel should never be lost. However, if a panel does become distorted, several techniques, such as vision, air flotation tables, and vibratory conveyors are available to restore the orientation. This thesis has investigated the behaviour of a fabric panel on a vibratory table. Several table parameters such as amplitude of vibration, frequency and angle of inclination, together with some important fabric properties as friction and compressibility are required to understand the behaviour. However, most work on friction in textiles considers fibre-fibre or fabric-fabric friction, which is not appropriate to this and so low force frictional properties between unloaded fabric and engineering surfaces (i.e., aluminium, Formica and rubber) have been studied. The influence of several experimental variables on friction is demonstrated, in particular, the effect of humidity and velocity. Further, an in depth study is made on the stick-slip of fabric panels wherein a novel measuring technique is introduced. An estimate of the damping, which is required to model the fabric, has been obtained from an in-plane vibration test. The second significant fabric property to be studied is the compression both static and impact. Again, only low-force compression tests are carried out since these are the typical forces experienced by fabrics on a vibrating table. The static compressibility of knitted and woven materials is verified with van Wvk's equation. which gives a near indistinguishable fit with the experimental data.
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Lydiatt, Francis Peter. "Vibrational sum-frequency spectroscopy : towards understanding adsorbate behaviour on substrates relevant to the nuclear fuel cycle." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/vibrational-sumfrequency-spectroscopy-towards-understanding-adsorbate-behaviour-on-substrates-relevant-to-the-nuclear-fuel-cycle(3a81bdcc-75d9-4fed-a949-ad43198625be).html.

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The primary goal of this thesis was to commission an instrument for vibrational sum frequency spectroscopy (VSFS), and exploit it for the study of solid/gas interfaces; of ultimate interest is characterisation of substrate surfaces in humid environments. Such effort is motivated by interest in understanding the potential for atmospheric corrosion in dry storage facilities of spent nuclear fuels or other nuclear-related wastes. VSFS is a non-linear, interface specific, vibrational spectroscopy, in which two photons of different energies (infrared (IR) and visible (VIS)) impinge upon a surface at the same point at the same time, leading to the generation of a third (sum-frequency generation (SFG)) photon. Features in VSFS spectra can be assigned to vibrational modes of interfacial species, and so enable details of interfacial structure and chemistry to be elucidated. An instrument for such measurements has been developed using laser facilitates located in the Photon Science Institute (PSI) of The University of Manchester. More specifically, an ultra-fast (femtosecond) laser has been employed as a light source, enabling acquisition of spectra (~250 cm-1 in width at a resolution of ~11 cm-1) without the need for scanning the energy of either IR or VIS beams, i.e. so called broad-band VSFS. To test performance, data have been acquired from self-assembled monolayers of alkanethiols (octadecanethiol) on gold substrates, which demonstrate the utility of the instrument. Subsequent to commissioning, the VSFS instrument was initially exploited to study the interaction of two organic molecules, acetonitrile and acetic acid, with a single crystal TiO2(110) substrate; measurements were performed with the sample exposed to the vapour of each organic species under ambient conditions. Surface adsorption was identified through the appearance of the CH3 symmetric stretch. Furthermore, spectra as a function of light (IR/VIS/SFG) polarization combinations have been recorded to explore adsorbate angular geometry. Finally, VSFS measurements have been undertaken from a number of substrates (GaAs, Au, Zn, Fe, Cr, stainless steel), as a function of relative humidity; D2O was employed to overcome the issue of loss of IR beam intensity due to interaction with atmospheric H2O. Signal quality varies significantly with substrate, with the most insight being gained for the interaction of D2O with polycrystalline Zn. Clear vibrational resonances due to both hydroxyls (OD) and molecular water (D2O) are observed, which vary with relative humidity, indicating that there are significant changes in interface structure with relative humidity.
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Rafferty, M. P. "Studies on the tonal qualities of violins : vibrational behaviour of the treble from the new violin family." Thesis, Bucks New University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376440.

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Avosani, Sabina. "Behaviour, ecology, and vibrational manipulation of insect vectors: the case of the meadow spittlebug Philaenus spumarius, with notes on a psyllid pest." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/319182.

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Insects can cause economic and environmental damages by transmitting bacterial pathogens to plants, making the use of control and prevention measures imperative. On the other hand, methods aimed at preventing crop pests’ outbreaks, such as tilling and insecticide applications, pose a threat to human and ecosystems health. Innovative and more sustainable control methods are therefore urgently needed to address farmers’ needs and preserve ecosystem services provided by biodiversity. Biotremology is an emerging science that studies the substrate-borne vibrational signals emitted by insects to communicate and interact with their others in the environment. As many insect pests rely on these signals to communicate, their behaviour can be manipulated by transmitting vibrations to the substrate where they thrive. Vibrational signals can, for instance, interfere with target’s behaviours such as mating, feeding, and residence time on the plant, and can therefore support integrated pest management strategies alternative to insecticides. In this work, I investigated the mating behaviour and vibrational communication of two insect vectors having an important economic impact: Philaenus spumarius (Hemiptera: Aphrophoridae) and Bactericera cockerelli (Hemiptera: Triozidae). I also provided novel insights regarding the vibrational manipulation of their behaviour. I characterised the sexual behaviour and associated vibrational signals of the meadow spittlebug P. spumarius, and I described other intraspecific interactions. I evaluated the correlation between the female signalling activity and development of the reproductive organs, suggesting that a vibrational mating disruption could be effective only if applied from the onset of egg maturation, which triggers the female proceptivity (from August onwards). Besides gathering behavioural data, I used occupancy models to estimate P. spumarius presence and detection probability in Trentino (Northern Italy), a rarely deployed approach to study insect distribution. Site covariates impacted P. spumarius detectability, suggesting that spittlebug presence can be overlooked if detection is not considered. As plant composition influences the presence and abundance of the spittlebug, I studied the association between P. spumarius and its host plants. Such information can support monitoring programs and control strategies aimed at reducing P. spumarius population in crops of interest by shaping the plant composition of the ground cover. After investigating the behaviours and the ecology of the spittlebug, I attempted to disrupt its feeding activity using vibrations, opening the gates for future research. In this regard, I combined for the first time biotremology with the Electrical Penetration Graph (EPG) technique. The tomato potato psyllid B. cockerelli is an important threat to New Zealand crops. Besides the characterisation of the pair formation process and associated vibrational signals, I used vibrations to disrupt mate finding by transmitting vibrations to the host plant. Given that the stimulus attracted male psyllids at small scale, this strategy is a feasible approach that could be implemented for use in fields and greenhouses. In this way, an innovative trapping and mating disruption device could join the farmers’ toolbox for monitoring and controlling B. cockerelli. In conclusion, I provided new information regarding the ethology of two insect vectors and suggested that there is room for applied biotremology to support sustainable management strategies.
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Fumis, Cristiana. "Mechanical Wave Propagation in Civil Engineering Materials." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Mechanical wave propagation in civil engineering materials is important for different application fields, such as thermal conductivity, damage detection and sound transmission (including filters and sound barriers). A current open challenge is to understand how the chemistry and microstructures of cementitious materials impact the propagation of mechanical waves in them. The challenge is heightened by the fact that cementitious materials are very heterogeneous at the microscale. In this project, molecular and nanoparticle based simulations will be used in order to construct microstructures of cement hydrates with a range of chemistries and morphologies. I will simulate the dynamic behaviour of these model structures and quantify it in terms of vibrational band structure and density of states. This will open the way to a new and fundamental understanding of how the chemistry and microstructure of cementitious materials can be tailored in order to engineer their vibrational behaviour, for controlled thermal conductivity, soundroof applications, and more efficient damage detection.
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Al-Share, Mohammad A. (Mohammad Abdel). "Anomalous Behavior in the Rotational Spectra of the v₈=2 and the v₈=3 Vibrations for the ¹³C and ¹⁵N Tagged Isotopes of the CH₃CN Molecule in the Frequency Range 17-95 GHz." Thesis, University of North Texas, 1990. https://digital.library.unt.edu/ark:/67531/metadc330976/.

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The rotational microwave spectra of the three isotopes (^13CH_3^12C^15N, ^12CH_3^13C^15N, and ^13CH_3^13C^15N) of the methyl cyanide molecule in the v_8=3, v_8=2, v_7=1 and v_4=1 vibrational energy levels for the rotational components 1£J£5 (for a range of frequency 17-95 GHz.) were experimentally and theoretically examined. Rotational components in each vibration were measured to determine the mutual interactions in each vibration between any of the vibrational levels investigated. The method of isotopic substitution was employed for internal tuning of each vibrational level by single and double substitution of ^13C in the two sites of the molecule. It was found that relative frequencies within each vibration with respect to another vibration were shifted in a systematic way. The results given in this work were interpreted on the basis of these energy shifts. Large departure between experimentally measured and theoretically predicted frequency for the quantum sets (J, K=±l, ϑ=±1), Kϑ-l in the v_8=3 vibrational states for the ^13c and ^15N tagged isotopes of CH_3CN showed anomalous behavior which was explained as being due to Fermi resonance. Accidently strong resonances (ASR) were introduced to account for some departures which were not explained by Fermi resonance.
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Wang, Zhongsheng. "VIbration behaviour of prestressed concrete beams." Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420369.

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Jubb, Aaron Michael. "Vibrational Spectroscopic Investigations of Sulfate Behavior at Environmental Interfaces." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1337782832.

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Books on the topic "Vibrational behaviour"

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Hill, Peggy S. M., Reinhard Lakes-Harlan, Valerio Mazzoni, Peter M. Narins, Meta Virant-Doberlet, and Andreas Wessel, eds. Biotremology: Studying Vibrational Behavior. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22293-2.

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Szemplińska-Stupnicka, Wanda. The behavior of nonlinear vibrating systems. Dordrecht: Kluwer Academic Publishers, 1990.

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Wagg, David J. Exploiting Nonlinear Behavior in Structural Dynamics. Vienna: Springer Vienna, 2012.

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Bachmann, Hugo, and Walter Ammann. Vibrations in Structures. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 1987. http://dx.doi.org/10.2749/sed003e.

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<p>«Vibrations in Structures» concentrates on vibrations in structures as excited by human motion or machine operation. Man-induced vibrations may arise from walking, running, skipping, dancing, etc. They occur mostly in pedestrian structures, office buildings, gym­nasia and sports halls, dancing and concert halls, stadia, etc. Existing publications treat by and large some isolated aspects of the problem; the present one attempts, for the first time, a systematic survey of man-induced vibrations. Machine-induced vibrations occur during the operation of all sorts of machinery and tools with rotating, oscillating or thrusting parts. The study concentrates rather on small and medium size machinery placed on floors of industrial buildings and creating a potential source of undesirable vibrations. The associ­ated questions have rarely been tackled to date; they entail probiems similar to those of man-induced vibrations.</p> <p>The book is consciously intended to serve the practising structural engineer and not primarily the dynamic specialist. It should be noted that its aim is not to provide directions on how to perform comprehensive dynamic computations. Instead, it attempts the following:</p> <ol> <li>to show where dynamic problems could occur and where a word of caution is good advice;</li> <li>to further the understanding of the phenomena encountered as well as of the underlying principles;</li> <li>to impart the basic knowledge for assessing the dynamic behaviour of the structures or structural elements;</li> <li>to describe suitable measures, both preventive to be applied in the design stage and remedial in the case of rehabilitation.</li> </ol>
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Moon, F. C. Chaotic vibrations: An introduction for applied scientists and engineers. New York: Wiley-Interscience, 2004.

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Moon, F. C. Chaotic vibrations: An introduction for applied scientists and engineers. New York: Wiley, 1987.

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Friesen, Timothy. A numerical investigation of large bubble translation behaviour due to forced vibration under microgravity. Ottawa: National Library of Canada, 2000.

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Nonlinearity and chaos in molecular vibrations. Boston: Elsevier, 2005.

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Winks, Cathy. The Good Vibrations guide: Adult videos. San Francisco, Calif: Down There Press, 1998.

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The Good Vibrations guide: The G-spot. San Francisco, Calif: Down There Press, 1998.

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Book chapters on the topic "Vibrational behaviour"

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Oberst, Sebastian, Joseph C. S. Lai, and Theodore A. Evans. "Physical Basis of Vibrational Behaviour: Channel Properties, Noise and Excitation Signal Extraction." In Biotremology: Studying Vibrational Behavior, 53–78. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22293-2_5.

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Körner, Claudia, Hartmut Hetzler, and Wolfgang Seemann. "Nonlinear Vibrational Behaviour of an Elasto-Pneumatic Training Tool." In Springer Proceedings in Physics, 673–80. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2069-5_90.

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La Rosa, G., G. Messina, S. M. Oliveri, and A. Volpe. "Influence of the drive-line on the vibrational behaviour of a vehicle." In Active Control in Mechanical Engineering, 353–61. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003211204-37.

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Powell, B. E., R. F. Hall, and M. Hawkyard. "The Effect of Superimposed Vibrational Stress on Low Cycle Fatigue Crack Propagation Behaviour." In Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials—3, 552–57. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2860-5_89.

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Bachschmid, N., A. Curami, and F. Petrone. "Vibrational Behaviour of Rotors with Gear Couplings in Case of Insufficient Coupling Lubrication." In Rotordynamics ’92, 232–39. London: Springer London, 1992. http://dx.doi.org/10.1007/978-1-4471-1979-1_29.

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Farantos, Stavros C., and Jonathan Tennyson. "A Ro-Vibrational Study of Regular/Irregular Behaviour of the CO-Ar System." In Fractals, Quasicrystals, Chaos, Knots and Algebraic Quantum Mechanics, 195–206. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-3005-6_14.

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Hager, Felix A., and Wolfgang H. Kirchner. "Directionality in Insect Vibration Sensing: Behavioral Studies of Vibrational Orientation." In Biotremology: Studying Vibrational Behavior, 235–55. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22293-2_12.

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Dambach, Martin. "6. Vibrational Responses." In Cricket Behavior and Neurobiology, edited by Franz Huber, Thomas E. Moore, and Werner Loher, 178–97. Ithaca, NY: Cornell University Press, 2019. http://dx.doi.org/10.7591/9781501745904-008.

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Schouten, J. A., and J. P. J. Michels. "High Pressure Behaviour of the Vibrational Spectra of Mixtures in the Fluid Phase and at the Fluid-Solid Transition." In High Pressure Molecular Science, 205–18. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4669-2_11.

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Hill, Peggy S. M., Valerio Mazzoni, Peter Narins, Meta Virant-Doberlet, and Andreas Wessel. "Quo Vadis, Biotremology?" In Biotremology: Studying Vibrational Behavior, 3–14. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22293-2_1.

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Conference papers on the topic "Vibrational behaviour"

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Kudritzki, Detlef K. "Road Tests Adopted to Analyse Cars’ Vibrational Behaviour." In SAE 2001 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-1098.

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Herzog, Raoul, and Philippe Blanc. "Time-optimal trajectory planning in CNC machining including vibrational behaviour." In 2015 European Control Conference (ECC). IEEE, 2015. http://dx.doi.org/10.1109/ecc.2015.7330824.

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Weilharter, B., O. Biro, H. Lang, G. Ofner, and S. Rainer. "Experimental investigation of the 3D vibrational behaviour of an induction machine." In 2012 XXth International Conference on Electrical Machines (ICEM). IEEE, 2012. http://dx.doi.org/10.1109/icelmach.2012.6350107.

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García, Iker, Joseba Zubia, Josu Beloki, Jon Arrue, and Joel Villatoro. "Evaluation of the vibrational behaviour of a rotating disk by optical tip-clearance measurements." In SPIE Optical Metrology, edited by Peter Lehmann, Wolfgang Osten, and Armando Albertazzi Gonçalves. SPIE, 2015. http://dx.doi.org/10.1117/12.2185273.

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Marini, Giacomo, Gerd Huber, and Stephen J. Ferguson. "Nonlinear Dynamic Behaviour of the Intervertebral Disc." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14641.

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The intervertebral disc, like many collagen-based tissues, has a mechanical response which is highly nonlinear (1). This characteristic is due to both the arrangement and composition of the tissue constituents of the disc (2). Over the past decades several studies have reported the nonlinear response of the disc for different loading scenarios. In particular, past studies were focused on the quasi-static and low frequency (< 10Hz) response to pure and combined cyclic loading, such as axial compression, shear, flexion/extension moment (3–6). The information provided by these studies has been applied in several fields, from the validation of numerical models to the development of disc prostheses. However, such loading conditions are only partially representative of the in-situ load that the intervertebral disc normally experiences. High frequency dynamics stimuli, such as that experienced while driving a car on a rough surface or driving heavy industrial machinery, are also important. It is well known that long-term exposure to vibrational loading is detrimental to normal disc metabolism (7,8). Despite its relevance only a few studies have investigated the dynamic response of the disc to high frequency vibration (9,10) with sometimes different outcomes. In particular, no study has shown an asymmetric, nonlinear dynamic behavior of the system, even though it is evident in quasi-static testing — the well-known tension / compression asymmetry. This aspect is somehow neglected when building rigid body models of the upper body for impact simulation where a Kelvin-Voigt model with linear stiffness is normally used. The aim of this experimental study was therefore to investigate the nonlinear dynamic response of the intervertebral disc to high frequency loadings, taking different pre-loads and displacement amplitude into account.
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Morini, M., M. Pinelli, and M. Venturini. "Acoustic and Vibrational Analyses on a Multi-Stage Compressor for Unstable Behavior Precursor Identification." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27040.

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The analysis of compressor behavior in critical working conditions, such as rotating stall and surge, represents a key aspect in the turbomachinery research field. In fact, both phenomena can lead to severe damage to the compression system and so the identification of unstable behaviour precursors is needed. The paper shows the test results of an experimental campaign conducted on a small size compressor with six axial stages and one centrifugal stage. In particular, the paper focuses on the analysis of acoustic and vibration measurements for both stationary conditions and for varying-over-time (i.e. gradually increasing) inlet mass flow rate. The correlation between compressor behavior in the operating region close to the surge line and vibration and acoustic measurements is investigated.
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Simionatto, Vinícius G. S., Hugo H. Miyasato, and Milton Dias Júnior. "Insights on Centrifugal Pendulum Vibration Absorber: Part Two — Behaviour of a FWD Powertrain With a CPVA on its Clutch’s Flange." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64426.

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This work is the second and last part of a study whose aim is to present the vibrational aspects of a system with a centrifugal pendulum vibration absorber (i.e. CPVA). The aim of this work, specifically, is to develop a mathematical model of a front engine–front wheel drive powertrain to study gear rattle phenomenon, and to install on its clutch disk’s flange a CPVA in order to understand what are the effects of this device on the dynamics of this system. Results from the linear analysis show that the eigenfrequencies of the system vary with the engine speed. They oscillate between the eigenvalues of the system without the CPVA and, for regions away from the tuning frequency of the pendulum, which is the second order of rotation of the engine, the behaviour of the system remains the same. However, near the tuning frequency of the pendulum, the behaviour of the system varies very much, and the amplitude of vibration of the gearbox’s inner parts diminishes. Simulations of the powertrain without and with the nonlinear model of the studied device show that its presence reduces dramatically the vibrations inside the gearbox and its nonlinear character does not influence the effectiveness of this solution.
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Söffker, Dirk, Jozef Bajkowski, and Peter C. Müller. "Crack Detection in Turbo Rotors Vibrational Analysis and Fault Detection." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0203.

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Abstract Applying the theory of Lyapunov exponents for nonsmooth dynamical systems, chaotic motions and strange attractors are found in the case of a cracked rotor. To detect the crack and establish a clear relation between shaft cracks in turbo rotors and induced phenomena in vibrations measured in bearings, a model-based method is applied. Based on a fictitious model of the time behaviour of the nonlinearities, a state observer of an extended dynamical system is designed resulting in estimates of the nonlinear effects.
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Lange, Sebastian, and Martin Pfost. "Impact of Design Aspects on the Vibrational Behaviour of the Stator End-Winding Region of Large Turbogenerators." In 2020 International Conference on Electrical Machines (ICEM). IEEE, 2020. http://dx.doi.org/10.1109/icem49940.2020.9271041.

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Radha, K. P., S. Selvasekarapandian, D. Vinoth Pandi, S. Karthikeyan, M. Hema, and C. Sanjeeviraja. "AC Conductivity, Vibrational and Structural Behaviour of Proton Conducting Gel Polymer Electrolyte based on Poly(Vinyl Alcohol)." In 14th Asian Conference on Solid State Ionics (ACSSI 2014). Singapore: Research Publishing Services, 2014. http://dx.doi.org/10.3850/978-981-09-1137-9_047.

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Reports on the topic "Vibrational behaviour"

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Ciezak, Jennifer A., and Timothy A. Jenkins. The Low-Temperature Vibrational Behavior of Pentaerythritol Tetranitrate. Fort Belvoir, VA: Defense Technical Information Center, June 2008. http://dx.doi.org/10.21236/ada484801.

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2

Cinar, A. Vibrational control of chemical reactors: Selectivity enhancement, stabilization and improvement of transient behavior. Office of Scientific and Technical Information (OSTI), September 1990. http://dx.doi.org/10.2172/6532352.

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Genis, Sean A. Nonlinear Acoustic Landmine Detection: Profiling Soil Surface Vibrations and Modeling Mesoscopic Elastic Behavior. Fort Belvoir, VA: Defense Technical Information Center, May 2007. http://dx.doi.org/10.21236/ada473345.

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Troth, Colin. Excitation Mechanisms and Vibration Behavior of an In-Line Three Cylinder Power Train. Warrendale, PA: SAE International, April 2011. http://dx.doi.org/10.4271/2011-01-0935.

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STUDY ON DYNAMIC BEHAVIORS AND VIBRATION REDUCTION TECHNIQUES ON CABLE-SUPPORTED RIBBED BEAM COMPOSITE SLAB. The Hong Kong Institute of Steel Construction, March 2019. http://dx.doi.org/10.18057/ijasc.2019.15.1.10.

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