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Relevant bibliographies by topics / Vibration period

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Academic literature on the topic 'Vibration period'

Author: Grafiati

Published: 24 June 2021

Last updated: 29 July 2025

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Journal articles on the topic "Vibration period"

1

Ryazancev, V., M. Gerasimov, and Y. Brazhnik. "REDUCTION OF DIFFERENTLY DIRECTIONAL VIBRATIONS TO ASYMMETRICAL BY CHANGING THE RATIO OF VALUES COMPOSING THE DRIVING FORCE." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 6, no. 5 (2021): 87–94. http://dx.doi.org/10.34031/2071-7318-2021-6-5-87-94.

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Vibrating machines play a primary role in the implementation of programs in the construction and road construction kit. The improvement of vibration machines allows to significantly increase the speed of construction and road construction work. The main working unit of a vibrating machine is a vibrating device or vibrator. Currently, in the industry, vibration devices are used with circular or directional, along a certain straight line of vibrations. Further improvement of vibrating machines is carried out in the direction of creating vibration devices with asymmetric vibrations. At present, t

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Dong, Jie, Yue Yang, and Zhi-Hui Wu. "Propagation characteristics of vibrations induced by heavy-haul trains in a loess area of the North China Plains." Journal of Vibration and Control 25, no. 4 (2018): 882–94. http://dx.doi.org/10.1177/1077546318802980.

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To study heavy train-related vibration, this paper examines the world's largest heavy-freight railway – the Daqin Railway – to study the impacts of the seasonally frozen soil layer on vibrational acceleration. With increasing axle weight, the peak and mean values of the acceleration increased. Vibration acceleration attenuated the most from the shoulder to the embankment footing (51%–71%), while the vibrations at 70 m were attenuated by more than 90%. Certain measures must be taken by those living within 70 m of the railway shoulder. In addition, the acceleration peak caused by trains running

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Susastro, Susastro, and Novi Indah Riani. "Pendekatan Eksperimen Karakteristik Respon Getaran Sistem Two Degree of Freedom dengan Penambahan Independent Dual Dynamic Vibration Absorber." R.E.M. (Rekayasa Energi Manufaktur) Jurnal 3, no. 2 (2019): 85. http://dx.doi.org/10.21070/r.e.m.v3i2.1729.

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Vibration is one of the problems that must be reduced in a vehicle. There are many ways to reduce vibration in vehicles, one of them is by adding Dynamic vibration absorber (DVA). While Dual Dynamic vibration absorber (dDVA) is a DVA period that is able to move in the translational direction given to the system to reduce translation vibration and when there is resonance. Translation DVA is an additional type of time used to reduce the vibration of the translation direction. So far there is not much research related to the use of translational DVA to reduce rotational vibrations as well as tran

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Wang, Rongrong, Bingnan Wang, Yachao Wang, Wei Li, Zhongbin Wang, and Maosheng Xiang. "Time-Varying Vibration Compensation Based on Segmented Interference for Triangular FMCW LiDAR Signals." Remote Sensing 13, no. 19 (2021): 3803. http://dx.doi.org/10.3390/rs13193803.

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Frequency modulation continuous wave (FMCW) light detection and ranging (LiDAR) 3D imaging system may suffer from time-varying vibrations which will affect the accuracy of ranging and imaging of a target. The system uses only a single-period FMCW LiDAR signal to measure the range of each spot; however, traditional methods may not work well to compensate for the time-varying vibrations in a single period because they generally assume the vibration velocity is constant. To solve this problem, we propose a time-varying vibration compensation method based on segmented interference. We first derive

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Anzani, Yunita Ayudhia Anzani, Syahri Ramadhanti, and Noval Mulya Dava. "Analysis of Factors Affecting Period on GHS Using PhET Simulation." Sunan Kalijaga Journal of Physics 5, no. 2 (2023): 63–68. https://doi.org/10.14421/physics.v5i2.3994.

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Physics is one of the sciences that is studied based on facts, natural phenomena, ideas and results of experiments/experiments. Physics is a science that is closely related to everyday life, one of which is found in Simple Harmonic Motion which discusses pendulums on clocks and strings on guitars. Simple vibrations (GHS) are an example of periodic motion when the amplitude of vibrations in the system is relatively small and the displacement is less than 15°. GHS is a regular alternating motion through the equilibrium point and the number of vibrations in one second is always constant. If the m

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Chang, Seongkyu. "Active Mass Damper for Reducing Wind and Earthquake Vibrations of a Long-Period Bridge." Actuators 9, no. 3 (2020): 66. http://dx.doi.org/10.3390/act9030066.

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An active mass damper (AMD) was developed that uses a linear motor and coil spring to reduce the vertical vibration of a long-period cable-stayed bridge subjected to wind and earthquake loads. A scaled-down bridge model and AMD were fabricated, and the control effect of the AMD was investigated experimentally and analytically. The AMD was controlled via a linear quadratic Gaussian algorithm, which combines a linear quadratic regulator and Kalman filter. The dynamic properties were investigated using a 1/10 scale indoor experimental model, and the results confirmed that the measured and analyti

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Khomenko, Andrei P., Sergey K. Kargapoltsev, and Andrey V. Eliseev. "Development of Approaches to Creation of Active Vibration Control System in Problems of the Dynamics for Granular Media." MATEC Web of Conferences 148 (2018): 11004. http://dx.doi.org/10.1051/matecconf/201814811004.

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The article deals with the development of mathematical models and evaluation criteria of the vibration field in the dynamic interactions of the elements of the vibrational technological machines for the processes of vibrational strengthening of long-length parts with help of a steel balls working medium. The study forms a theoretical understanding of the modes of motions of material particles in interaction with a vibrating surface of the working body of the vibration machine. The generalized approach to the assessment of the dynamic quality of the work of vibrating machines in multiple modes

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Cveticanin, L. "Period of vibration of axially vibrating truly nonlinear rod." Journal of Sound and Vibration 374 (July 2016): 199–210. http://dx.doi.org/10.1016/j.jsv.2016.03.027.

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An, Xue Li, Dong Xiang Jiang, Ming Hao Zhao, and Chao Liu. "Numerical Analysis of Coupled Lateral and Torsional Vibrations of a Vertical Unbalanced Rotor." Applied Mechanics and Materials 20-23 (January 2010): 352–57. http://dx.doi.org/10.4028/www.scientific.net/amm.20-23.352.

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A model for the coupled lateral and torsional vibrations of a vertical unbalanced rotor is developed. The equation of motion is obtained using Lagrangian dynamics without considering the external actuating forces and torque. The equation showed coupling and nonlinear interaction between the rotor lateral and torsional vibrations. Most of the earlier work on coupled vibrations has been done for the horizontal rotor model. The coupled vibrations for a vertical rotor have not been reported in the past. An attempt is made to reveal dynamic characteristics of vertical rotor. The results of the simu

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BASTRUKOV, S. I., J. W. YU, R. X. XU, and I. V. MOLODTSOVA. "RADIATIVE ACTIVITY OF MAGNETIC WHITE DWARF UNDERGOING LORENTZ-FORCE-DRIVEN TORSIONAL VIBRATIONS." Modern Physics Letters A 26, no. 05 (2011): 359–66. http://dx.doi.org/10.1142/s0217732311034761.

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We study radiative activity of magnetic white dwarf undergoing torsional vibrations about axis of its own dipole magnetic moment under the action of Lorentz restoring force. It is shown that pulsating white dwarf can convert its vibration energy into the energy of magneto-dipole emission, oscillating with the frequency equal to the frequency of Alfvén torsional vibrations, provided that internal magnetic field is decayed. The most conspicuous feature of the vibration energy powered radiation in question is the lengthening of periods of oscillating emission; the rate of period elongation is det

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Dissertations / Theses on the topic "Vibration period"

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Dominguez, Morales Martha. "Fundamental period of vibration for reinforced concrete buildings." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/MQ58450.pdf.

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Young, Kelly Christine. "An Investigation of the Fundamental Period of Vibration of Irregular Steel Structures." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1316473829.

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Ticona, A. M., M. A. Rosales, and J. D. Orihuela. "Correction coefficients of distortion and vibration period for buildings due to soil-structure interaction." OP Publishing Ltd, 2020. http://hdl.handle.net/10757/656571.

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The present research analyzed the influence of the soil structure interaction (SSI) in buildings, varying geotechnical parameters and height, considering 3 international codes. The responses obtained from the structures taking into account the SSI, were compared with the responses of fixed-base buildings, being the main control variables: the period and the drift. It was determined that the estimated range in which the period of the structure increases is from 30 to 98%, demonstrating the influence of considering soil flexibility. Due to the variability of the responses obtained, an adjustment

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Hafeez, Ghazanfarah. "Dynamic Characteristics of Light-frame Wood Buildings." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36223.

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This research project deals with dynamic field testing of light-frame wood buildings with wood based shear walls. The primary objective of the investigation is to evaluate the code formula for estimating light wood frame building’s fundamental period, through intensive field testing and numerical modelling. The project also aims to propose an alternative simplified rational approach where applicable. The thesis provides insight to the ambient vibration testing procedures of light-frame wood buildings and explains the protocol adopted for the current research program. Ambient vibration (AV) fi

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Navrátilová, Martina. "Nelineární dynamická analýza konstrukce zatížena seismickými účinky." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227701.

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Diploma thesis compares the methods for the calculation of the response of structures with seismic loads. Linear and nonlinear analyses are used for the calculations. In the case of linear analysis response spectrum method is applied. For nonlinear analysis pushover method is used. These two methods are compared in programs AxisVM and RFEM on the examples of high-rise building and space frame.

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Sun, Xiangkun. "Elastic wave propagation in periodic structures through numerical and analytical homogenization techniques." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEC041/document.

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Dans ce travail, la méthode homogénéisation de multi-échelle, ainsi que diverses méthodes non homogénéisation, seront présentés pour étudier le comportement dynamique des structures périodiques. La méthode de multi-échelle commence par la séparation d'échelles. Dans ce cas, une échelle microscopique pour décrire le comportement local et une échelle macroscopique pour décrire le comportement global sont introduites. D'après la théorie de l'homogénéisation, la longueur d'onde est supposée grande, et la longueur de la cellule doit être beaucoup plus petite que la longueur caractéristique de la st

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石田, 幸男, Yukio ISHIDA, 剛志井上 та ін. "重力と非線形ばね特性の作用を受ける偏平軸の振動 (内部共振の影響)". 日本機械学会, 2001. http://hdl.handle.net/2237/9052.

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Bao, Bin. "Distributed, broadband vibration control devices using nonlinear approaches." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI086/document.

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L’amélioration du confort des usagers ainsi que l’augmentation du niveau de sécurité des structures requièrent le développement de techniques permettant de limiter efficacement les vibrations. Dans cette optique, les travaux exposés ici proposent le développement et l’analyse de méthodes de contrôle vibratoire pour des structures de faibles dimensions et utilisant peu d’énergie. Afin de satisfaire à ces deux critères, il est ici proposé d’utiliser des éléments piézoélectriques électriquement interfacés de manière non-linéaire et périodiquement distribués sur la structure-cible à contrôler. Ain

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Rodrigues, Cunha Leandro. "Robust bandgaps for vibration control in periodic structures." Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD060.

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Dans cette thèse, une méthodologie simple pour trouver des bandes interdites robustes est présentée. Quatre cellules unitaires différentes sont utilisées comme exemples numériques pour des modèles infinis et finis. Les deux premiers sont liés aux zones d'atténuation créées pour les ondes longitudinales en utilisant des cellules unitaires de masse et ressort et de barres. La méthode Matrice de Transfert est utilisée pour modéliser la cellule unitaire. Avec cette méthode, il est possible d'obtenir les réponses en fréquence, en utilisant une méthode spectrale, et des constantes de dispersion, en

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Ben, Brahim Nadia. "Approche multiéchelle pour le comportement vibratoire des structures avec un défaut de rigidité." Phd thesis, Université Nice Sophia Antipolis, 2014. http://tel.archives-ouvertes.fr/tel-01066795.

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Nous considérons un système mécanique en vibration non linéaire, pour lequel nous fournissons une solution approchée par l'utilisation des développements multiples échelles; nous proposons d'abord une étude avec double échelles puis avec triple échelles où nous comparons les deux approches. Une preuve rigoureuse de ces développements a été faite. L'étude de la stabilité de la solution est nécessaire pour montrer la convergence au voisinage de la résonance. Un lien entre l'amplitude de la réponse vibratoire et la fréquence du système en vibration libre a été mis en évidence.

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Books on the topic "Vibration period"

1

United States. National Aeronautics and Space Administration, ed. Vibration and structureborne noise in space station: Progress report for NASA grant NAG-1-541 for the period January 1, 1986 - June 30, 1986. National Aeronautics and Space Administration, 1986.

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United States. National Aeronautics and Space Administration., ed. Vibration and structureborne noise in space station: Progress report for NASA grant NAG-1-541 for the period January 1, 1986 - June 30, 1986. National Aeronautics and Space Administration, 1986.

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Mei, C. Component mode synthesis and large deflection vibration of complex structures: Final report for the period ended January 31, 1987. National Aeronautics and Space Administration, 1987.

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Britcher, Colin P. Large angle magnetic suspension test fixture: Final report for the period ended October 31, 1995. Old Dominion University Research Foundation, 1995.

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United States. National Aeronautics and Space Administration., ed. Vibration isolation technology: Sensitivity of selected classes of experiments to residual accelerations : final report ... period of performance 7/1/88 - 6/30/91. Center for Microgravity and Materials Research, University of Alabama in Huntsville, 1991.

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Britcher, Colin P. Large angle magnetic suspension test fixture: Progress report for the period November 1, 1992 to May 31, 1993. Dept. of Mechanical Engineering & Mechanics, College of Engineering & Technology, Old Dominion University, 1993.

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Jen-Kuang, Huang, and Langley Research Center, eds. Large angle magnetic suspension test fixture: Final report for the period 11-1-95 thru 10-31-96. National Aeronautics and Space Administration, 1996.

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Britcher, Colin P. Large angle magnetic suspension test fixture: Final report for the period 11-1-95 thru 10-31-96. National Aeronautics and Space Administration, 1997.

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Britcher, Colin P. Large angle magnetic suspension test fixture: Progress report for the period November 1, 1995 through May 1, 1996. Dept. of Aerospace Engineering, Dept. of Mechanical Engineering, College of Engineering & Technology, Old Dominion University, 1996.

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Barbieri, Enrique. Momentum management in redundant manipulators for vibration suppression: Final report, NASA research grant NAG-1-1270 : report period June 1, 1992 - August 31, 1993. National Aeronautics and Space Administration, 1993.

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Book chapters on the topic "Vibration period"

1

Charney, Finley A. "Period of Vibration." In Seismic Loads. American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784413524.ch17.

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Luo, Albert C. J., and Chuan Guo. "Independent Period-12 Motions." In Nonlinear Vibration Reduction. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-17499-5_7.

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Luo, Albert C. J., and Chuan Guo. "Independent Period-3 Motions." In Nonlinear Vibration Reduction. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-17499-5_5.

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Luo, Albert C. J., and Chuan Guo. "Independent Period-9 Motions." In Nonlinear Vibration Reduction. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-17499-5_6.

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Luo, Albert C. J., and Chuan Guo. "Period-1 Motion to Chaos." In Nonlinear Vibration Reduction. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-17499-5_4.

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Manyin, Hu, Liu Yujing, Yin Qi, Liu Zhong, and Gao Xianglin. "Research on Vibration Period Optimization of Electrostatic Precipitator." In Electrostatic Precipitation. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89251-9_19.

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Soni, Prabhat K., Prakash Sangamnerkar, and S. K. Dubey. "Fundamental Time Period of Vibration in Seismic Analysis." In Lecture Notes in Civil Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0890-5_56.

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Roy, Anuja, Atanu Sahu, and Debasish Bandyopadhyay. "A Novel Sloshing Damper for Vibration Control of Short Period Structures." In Lecture Notes in Civil Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8138-0_26.

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Pandey, Dhirendra Kumar, and Sudib Kumar Mishra. "Modified Tuned Liquid Damper for Vibration Control of Short Period Structures." In Lecture Notes in Civil Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9976-7_24.

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Kawamura, Shozo, Tetsuhiko Owa, Tomohiko Ise, and Masami Matsubara. "Proposition of Isolation Table Considering the Long-Period Earthquake Ground Motion (Method of Changing Natural Frequency of Isolation System with Additional Spring)." In Vibration Engineering for a Sustainable Future. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-48153-7_32.

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Conference papers on the topic "Vibration period"

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Romano, Peter, Michael Seifert, and Michael Smith. "The 505 Low Vibration Solution." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12028.

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The original 505 Jet Ranger X prototype used a simple hard-mounted focal pylon to attach the transmission to the airframe. In developmental flight tests, the design resulted in 2/rev vibration levels that exceeded program objectives for ride quality in high speed forward flight. To address the vibration levels, a LIVE pylon mount was designed over a 4-month period to serve as a drop-in replacement with minimal impact to existing systems. An overview of the rapid design process is presented with supporting analysis and test data that led to its incorporation on the aircraft. The LIVE pylon desi

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Takeya, Kouichi, Yuichi Ito, Eiichi Sasaki, and Tang Xu. "Enhancement of B-WIM Using Time-Frequency Analysis of Bridge Acceleration Responses and Neural Networks." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.2149.

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<p>This study aimed to enhance Bridge Weigh-in-Motion (B-WIM) by utilizing bridge vibration responses to obtain detailed traffic information. Time-frequency analysis of acceleration responses was performed to extract key features, followed by deflection calculations through double integration with drift correction. Vehicle entry and exit times were detected using longitudinal acceleration, enabling accurate deflection calculations. Forced vibrations were identified, and features such as RMS value, waveform area, and wave group period were employed to analyze vibrations caused by vehicles

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Gerasimenko, Yaroslav A., Carmen Roelcke, Lukas Z. Kastner, et al. "Ultrafast scanning tunneling spectroscopy of a phonon-driven atomic vacancy in a monolayer crystal." In CLEO: Fundamental Science. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_fs.2024.fw3b.5.

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Understanding the interplay of atomic and electronic motion requires probing at intrinsic space-time-energy scales. We resolve phonon modulations of defect-bound states by sampling electronic spectra with atomic and sub-ps precision, faster than a vibration period.

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Lee, Seung-Yop. "Free Vibration Energy and Period of a String With Time-Varying Length." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-2011.

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Abstract We introduce a new technique to analyze free vibration energy and natural frequencies of a string with time-varying length by dealing with traveling waves. One of boundaries is vertically fixed but it moves axially at a constant rate. When the string length is varied, the free vibration energy and period also change with time. String tension and non-zero instantaneous vertical velocity at the moving boundary results in the energy variation. When the string undergoes retraction, the vibration energy increases with time. The new technique using traveling waves gives the exact amount of

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Takeuchi, Makoto, Satoshi Tanaka, Shingo Tekuramori, Atsushi Wada, and Nobuaki Takahashi. "Mechanical vibration sensing using cascaded long period fiber grating." In 2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR). IEEE, 2013. http://dx.doi.org/10.1109/cleopr.2013.6600331.

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Somatomo, Hiroyuki, Satoshi Tanaka, and Nobuaki Takahashi. "Vibration sensing of solid using long-period fiber grating." In 19th International Conference on Optical Fibre Sensors, edited by David D. Sampson. SPIE, 2008. http://dx.doi.org/10.1117/12.785961.

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Pi, Jun, and Xiangji Bu. "Analysis of Full-Period and Non-full-Period Sampling of Vibration Signal for Engine Rotors." In 2015 International Conference on Industrial Technology and Management Science. Atlantis Press, 2015. http://dx.doi.org/10.2991/itms-15.2015.121.

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Zhang, Zhao, Xinwen Yang, Dingwei Qian, and Zhijun Zhao. "Study on Vibration Damping Performance of Period-Structure Rail Pad." In Second International Conference on Rail Transportation. American Society of Civil Engineers, 2022. http://dx.doi.org/10.1061/9780784483886.020.

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Black, Jared L. "Using Vibration Measurements to Assess Structural Integrity." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79144.

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Structural vibration monitoring can aid in assessing offshore platform structural integrity. The method utilizes topside acceleration measurements to detect the platform’s natural periods of vibration; the periods depend only on platform weights (mass) and resistance (stiffness). If the platform’s natural period increases over time, in the absence of a change in mass, it can indicate a loss of structural integrity. The vibration survey utilizes a portable monitoring system, which includes sensitive low frequency accelerometers. The above water monitoring provides information on the below water

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Chen, Yuanhao, Bin Chen, Xinya Wang, Yeyin Xu, and Tieyan Wang. "Nonlinear Vibration and Bifurcations of a Bending-Twisting Rotor System." In ASME 2024 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2024. https://doi.org/10.1115/imece2024-144858.

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Abstract In this paper, a nonlinear dynamic system of a bending-twisting rotor is studied. Analytical prediction of nonlinear vibrations in such a nonlinear dynamic system are presented from the implicit mapping method. Bifurcations on vibration evolution are obtained and the stability of the corresponding vibrations are discussed by eigenvalue analysis. Period-doubling bifurcations occur when the rotating frequency varies where subharmonic vibrations emerge. The discrete Poincare displacements and velocities of periodic vibrations exhibit the motion complexity and give good scenarios of the b

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Reports on the topic "Vibration period"

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Paidoussis, Michael. PR-593-16703-R01 Lab and Analytical Model - Flow Induced Vibration of Brine Strings. Pipeline Research Council International, Inc. (PRCI), 2018. http://dx.doi.org/10.55274/r0011505.

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This is the report on the 3rd phase of "Brine String Stability Studies" at McGill University for the period of April 2017 to November 2017. Some recent modifications on experimental setup, results of both theoretical and experimental investigations for a discharging tube with an aspirating annulus (configuration (iii)) and experimental achievements for an aspirating tube with a discharging annulus (configuration (iv)) are given. In addition to the results for the brine string problem with internal and external axial flow, a new idea for developing nonlinear dynamics of cantilevered plates in r

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Mazzoni, Silvia, Nicholas Gregor, Linda Al Atik, Yousef Bozorgnia, David Welch, and Gregory Deierlein. Probabilistic Seismic Hazard Analysis and Selecting and Scaling of Ground-Motion Records (PEER-CEA Project). Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2020. http://dx.doi.org/10.55461/zjdn7385.

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This report is one of a series of reports documenting the methods and findings of a multi-year, multi-disciplinary project coordinated by the Pacific Earthquake Engineering Research Center (PEER) and funded by the California Earthquake Authority (CEA). The overall project is titled “Quantifying the Performance of Retrofit of Cripple Walls and Sill Anchorage in Single-Family Wood-Frame Buildings,” henceforth referred to as the “PEER–CEA Project.” The overall objective of the PEER–CEA Project is to provide scientifically based information (e.g., testing, analysis, and resulting loss models) that

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Wang, Kon-Well. Piezoelectric Tailoring with Enhanced Electromechanical Coupling for Concurrent Vibration Control of Mistuned Periodic Structures. Defense Technical Information Center, 2006. http://dx.doi.org/10.21236/ada471779.

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Taylor. L51755 Development and Testing of an Advanced Technology Vibration Transmission. Pipeline Research Council International, Inc. (PRCI), 1996. http://dx.doi.org/10.55274/r0010124.

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Fiber optic sensors have been under development in industrial and government laboratories around the world for over a decade. The commercial market for fiber sensors for measuring parameters such as temperature, displacement, and liquid level is now estimated to exceed $100 M/year. Aside from the commercial interest, the U. S. Department of Defense has vigorously pursued the development of fiber gyroscopes and hydrophones. In spite of the high level of research and development activity, however, until recently fiber sensors had not been successfully applied in high-temperature engine environme

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Xi, X. Vibrational and Electronic Properties of Fullerene and Carbon-Based Clustors. Final Reports for period July 1, 1997 - June 30, 2001. Office of Scientific and Technical Information (OSTI), 2002. http://dx.doi.org/10.2172/833761.

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Stevens, R. D., B. V. Chapnik, and B. Howe. L51960 Acoustical Pipe Lagging Systems Design and Performance. Pipeline Research Council International, Inc. (PRCI), 1998. http://dx.doi.org/10.55274/r0010392.

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Noise levels radiated from the exterior of a pipe wall can significantly contribute to the overall noise levels on the site of a gas plant and at neighboring properties. The noise inside the piping is generated both by the gas compressor itself, and by the flow of gas through valves, elbows and fittings. Sound inside the pipe couples to the pipe wall by exciting vibration modes, some of which are radiated from the exterior of the pipe into the air. Piping is geometrically circular, which provides it with considerable increased stiffness versus a flat plate, and thereby assists in its ability t

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Mizrach, Amos, Michal Mazor, Amots Hetzroni, et al. Male Song as a Tool for Trapping Female Medflies. United States Department of Agriculture, 2002. http://dx.doi.org/10.32747/2002.7586535.bard.

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This interdisciplinaray work combines expertise in engineering and entomology in Israel and the US, to develop an acoustic trap for mate-seeking female medflies. Medflies are among the world's most economically harmful pests, and monitoring and control efforts cost about $800 million each year in Israel and the US. Efficient traps are vitally important tools for medfly quarantine and pest management activities; they are needed for early detection, for predicting dispersal patterns and for estimating medfly abundance within infested regions. Early detection facilitates rapid response to invasio

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Schofield, Ian S., Paul L. Brown, Mark J. Logsdon, and Matthew P. Wickham. Waste Rock Dump Characterization Studies at the Bingham Canyon Mine. Utah Geological Survey, 2024. http://dx.doi.org/10.34191/mp-179.

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The Bingham Canyon Mine, located near Salt Lake City, Utah, is surrounded by more than 6 billion tons of waste rock developed over the open cut mining history from 1903 to present; the surface area of the waste rock is approximately 5000 acres. Waste rock dumps have a thickness of more than 1 200 feet from crest to toe. From 1930 to 2000, selected portions of the waste rock dumps were commercially leached using a ferric-sulfate-based lixiviant to extract copper, whereas other portions have only received meteoric leaching. From 2011 to present, Rio Tinto Kennecott has studied the evolution and

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Quinn, Meghan. Geotechnical effects on fiber optic distributed acoustic sensing performance. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41325.

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Distributed Acoustic Sensing (DAS) is a fiber optic sensing system that is used for vibration monitoring. At a minimum, DAS is composed of a fiber optic cable and an optic analyzer called an interrogator. The oil and gas industry has used DAS for over a decade to monitor infrastructure such as pipelines for leaks, and in recent years changes in DAS performance over time have been observed for DAS arrays that are buried in the ground. This dissertation investigates the effect that soil type, soil temperature, soil moisture, time in-situ, and vehicle loading have on DAS performance for fiber opt

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Correlation Between Vibration Level, Lubricating Oil Viscosity and Total Number Base of an Internal Combustion Engine Operated with Gasoline and Ethanol. SAE International, 2022. http://dx.doi.org/10.4271/2022-01-0620.

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Lubricating oils for automotive engines have been incorporating important improvements in chemical properties to increase engine performance, reduce fuel consumption and vehicular emissions indices, in addition to increasing the time interval for changing the lubricant itself. The objective of this study is to investigate the vibrational behavior of the block and crankshaft an Otto cycle internal combustion engine operated with ethanol and gasoline fuel as a function of the viscosity and total base number (TBN) of the lubricant. The study consisted of instrumenting the block and the 1st and 5t

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