Log in

Relevant bibliographies by topics / Fundamental characteristic mode of vibration / Journal articles

To see the other types of publications on this topic, follow the link: Fundamental characteristic mode of vibration.

Journal articles on the topic 'Fundamental characteristic mode of vibration'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Fundamental characteristic mode of vibration.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Nguyen, Thanh Q., Thao D. Nguyen, Lam Q. Tran, and Nhi K. Ngo. "A New Insight to Vibration Characteristics of Spans under Random Moving Load: Case Study of 38 Bridges in Ho Chi Minh City, Vietnam." Shock and Vibration 2020 (November 4, 2020): 1–20. http://dx.doi.org/10.1155/2020/1547568.

Full text

Abstract:

We propose a novel representative power spectrum density as a specific characteristic for showing responses of spans during a long operational period. The idea behind this method is to use the representative power spectrum density as a powerful tool to evaluate the stiffness decline of spans during their operation period. In addition, a new measurement method has been introduced to replace the traditional method of monitoring the health conditions of bridges through a periodic measurement technique. This helps to reduce costs when carrying out testing bridges. Besides, the proposed approach ca

APA, Harvard, Vancouver, ISO, and other styles

2

Lu, Guanya, Kehai Wang, and Weizuo Guo. "Vibration characteristic analyses of medium-and small-span girder bridge groups in highway systems based on machine learning models." Advances in Structural Engineering 24, no. 11 (2021): 2336–50. http://dx.doi.org/10.1177/1369433221997722.

Full text

Abstract:

There are large amounts of small-and medium-span girder bridges which bear structural similarity, while the large-scale bridge structures are generally limited in the timely applications of structural vibration characteristics. Therefore, in this study a framework based on machine learning models was proposed to analyze the vibration characteristics of specific line bridge groups. The probability distributions of structural, geometric, and material properties of bridge groups in specific lines were obtained using statistical tools and a Latin hypercube sampling method was used to generate reas

APA, Harvard, Vancouver, ISO, and other styles

3

Li, Xiyue, Siyuan Wang, Yaqing Guo, et al. "Experiments and Simulation on the Effects of Arch Height Variation on the Vibrational Response of Paulownia Wood." Forests 16, no. 3 (2025): 545. https://doi.org/10.3390/f16030545.

Full text

Abstract:

Resonance boards of Chinese traditional instruments such as the Guzheng and Guqin typically are arched, with the arch height influencing their resonance characteristics. This study focuses on Paulownia wood utilized for resonance boards. The bottom surfaces were thinned in 1 mm increments, with vibration signatures acquired at each reduction stage using a multi-channel FFT analyzer. Subsequently, time-domain characteristic parameters of the signals were extracted through MATLAB-based signal processing. Modal and harmonic response simulations of the structure were conducted using finite element

APA, Harvard, Vancouver, ISO, and other styles

4

Yang, Bin, Zheng Shi, Qun Wang, et al. "Frequency spectrum of the human head–neck to mechanical vibrations." Journal of Low Frequency Noise, Vibration and Active Control 37, no. 3 (2017): 611–18. http://dx.doi.org/10.1177/1461348417747179.

Full text

Abstract:

This study is based on a real finite element human head–neck model and concentrates on its numerical vibration characteristic. Frequency spectrum and mode shapes of the finite element model of human head–neck under mechanical vibration have been calculated. These vibration characteristics are in good agreement with the previous studies. The simulated fundamental frequency of 35.25 Hz is fairly similar to the published documents, and rarely reported modal responses such as “mastication” and flipping of nasal lateral cartilages modes, however, are introduced by our three-dimensional modal analys

APA, Harvard, Vancouver, ISO, and other styles

5

Wu, Shaokun, Mingyue He, Mei Yang, and Bijie Peng. "Near-Infrared Spectroscopic Study of OH Stretching Modes in Kaolinite and Dickite." Crystals 12, no. 7 (2022): 907. http://dx.doi.org/10.3390/cryst12070907.

Full text

Abstract:

Kaolinite and dickite are differently ordered polytypes of kaolinite-group minerals, whose differences are in the stacking mode of layers and ion occupation. Fourier transform infrared spectroscopy was used to collect information about the differences between the two minerals. The common characteristics of kaolinite and dickite are bands near 4530 and 7068 cm−1, which are attributed to the combination of the inner Al-OH stretching vibration and outer Al-OH bending vibration and the overtone of the inner Al-OH stretching vibration, respectively. The difference is that kaolinite has secondary pe

APA, Harvard, Vancouver, ISO, and other styles

6

Li, Yu, Zhong Tang, Ben Zhang, and Meilin Wang. "Vibration Transmission Characteristics and Detection Method of Bilateral Chain Drive of Multicylinders." Mathematical Problems in Engineering 2021 (May 29, 2021): 1–22. http://dx.doi.org/10.1155/2021/5582422.

Full text

Abstract:

The transmission modes of multiple rotating parts on the combine harvester are complex and diverse, and the excitation vibrations are coupled with each other, which makes it difficult to dynamically balance the parallel rotating bodies on-site. In order to obtain the influence of the multicylinder transmission system on the vibration response and transmission characteristics of the whole machine providing an experimental basis for the overall balance of the multicylinder system, this paper tested and analyzed the vibration response and shaft vibration state of the system under different transm

APA, Harvard, Vancouver, ISO, and other styles

7

Bhardwaj, N., A. P. Gupta, and K. K. Choong. "Asymmetric Vibration of Polar Orthotropic Annular Circular Plates of Quadratically Varying Thickness with Same Boundary Conditions." Shock and Vibration 15, no. 6 (2008): 599–617. http://dx.doi.org/10.1155/2008/858025.

Full text

Abstract:

In the present paper, asymmetric vibration of polar orthotropic annular circular plates of quadratically varying thickness resting on Winkler elastic foundation is studied by using boundary characteristic orthonormal polynomials in Rayleigh-Ritz method. Convergence of the results is tested and comparison is made with results already available in the existing literature. Numerical results for the first ten frequencies for various values of parameters describing width of annular plate, thickness profile, material orthotropy and foundation constant for all three possible combinations of clamped,

APA, Harvard, Vancouver, ISO, and other styles

8

Wang, Bor-Tsuen, Chun-Lang Tsai, and Ying-Hui Wu. "Vibration modes and sound characteristic analysis for different sizes of singing bowls." MATEC Web of Conferences 185 (2018): 00017. http://dx.doi.org/10.1051/matecconf/201818500017.

Full text

Abstract:

The singing bowl is used not only for the instrument of Buddhism but also for musical therapy. This work aims to investigate the correlation of vibration modes and percussion sound for singing bowls. A typical singing bowl is first selected to perform finite element analysis (FEA) for theoretical modal analysis (TMA) as well as experimental modal analysis (EMA). Modal parameters of singing bowl, including natural frequencies and mode shapes, can be obtained from analysis and experiment, respectively. Singing bowl FE model can then be updated and verified by adjusting material properties and us

APA, Harvard, Vancouver, ISO, and other styles

9

Idris, Muhammad, Zakie Anugia, and Donny Mustika. "DEVELOPMENT OF FINITE ELEMENT ANALYSIS PROGRAM FOR ROTORDYNAMIC PREDICTION OF SINGLE AND MULTI DISK ROTOR MODEL." Indonesian Journal of Engineering and Science 3, no. 3 (2022): 001–13. http://dx.doi.org/10.51630/ijes.v3i3.61.

Full text

Abstract:

The rotating equipment is a crucial part of system performance reliability. Vibration, as a characteristic of an oscillating body, is a fundamental parameter to determine the dynamic behaviour of the rotor system. The dynamic characteristics include natural frequency, critical speed, mode shape, and vibration response. This paper discussed the application of rotordynamics analysis as a tool to numerically predict the dynamic behaviour of a rotor system. The aim is to determine a rotor system's natural frequency and critical speed by a finite element analysis (FEA) program. The selected method

APA, Harvard, Vancouver, ISO, and other styles

10

Wu, Haoyu, Mingyue He, Shaokun Wu, Mei Yang, and Xi Liu. "Near-Infrared Spectroscopy Study of OH Stretching Modes in Pyrophyllite and Talc." Crystals 12, no. 12 (2022): 1759. http://dx.doi.org/10.3390/cryst12121759.

Full text

Abstract:

Pyrophyllite and talc are both tetrahedra–octahedra–tetrahedra (TOT)-type phyllosilicates, but differences can be found in the stacking mode of the layers and the ion occupation. Fourier transform infrared spectroscopy was used to differentiate between pyrophyllite and talc. In the 400–600 cm−1 region, pyrophyllite exhibits six peaks, while talc only exhibits five peaks. In the 1000–1200 cm−1 region, pyrophyllite exhibits three clear peaks at approximately 1051, 1070, and 1121 cm−1; while talc only exhibits one strong peak near 1020 cm−1. The differences between pyrophyllite and talc in the ne

APA, Harvard, Vancouver, ISO, and other styles

11

Wu, B., Y. Gan, E. Carrera, and W. Q. Chen. "Three-dimensional vibrations of multilayered hollow spheres submerged in a complex fluid." Journal of Fluid Mechanics 879 (October 1, 2019): 682–715. http://dx.doi.org/10.1017/jfm.2019.681.

Full text

Abstract:

Fluid–structure interaction is fundamental to the characteristics of the induced flows due to the motion of structures in fluids and also is crucial to the performance of submerged structures. This paper presents a three-dimensional analytical study of the intrinsic free vibration of an elastic multilayered hollow sphere interacting with an exterior non-Newtonian fluid medium. The fluid is assumed to be characterized by a compressible linear viscoelastic model accounting for both the shear and compressional relaxation processes. For small-amplitude vibrations, the equations governing the visco

APA, Harvard, Vancouver, ISO, and other styles

12

Wu, Juan. "Vibration of Lifting Rope when Cage Is Locking." Advanced Materials Research 472-475 (February 2012): 1559–62. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.1559.

Full text

Abstract:

Analysis of vibration characteristics when the cage is locking. Deduce vibration model by elastic lifting rope, interaction of sheave and rope. Based on step function, a wire rope vibration mode function, vibration displacement and tension solution are given. Results show that the cage locking device reduces impact and avoids the slippery rope and the security hidden danger. The vibration model of locking cage process is applied to the cage jammed situation. If the frequency during sudden jam is greater than or equal to the fundamental frequency, hoisting wire rope fracture does not occur.

APA, Harvard, Vancouver, ISO, and other styles

13

Xiao, Ye, and Xiao Tang Ding. "Analysis and Research on Dynamic Characteristics of Bulb Tubular Pumping Station Structure." Advanced Materials Research 594-597 (November 2012): 1917–21. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.1917.

Full text

Abstract:

This paper was combined with the third Huaian pumping station to study the dynamic characteristics of the bulb tubular pumping station. By using dynamic finite element analysis method to create Huaian pumping station modes. Then using ANSYS Model Analysis and harmonic response analysis, the vibration modes and dynamic response were researched deeply. According to the mode analysis results, the fundamental frequencies of upper pump house were determined for 1.36Hz and the fundamental frequencies of substructure were determined for 20.11Hz. The dynamic response of the bulb tubular pumping statio

APA, Harvard, Vancouver, ISO, and other styles

14

Li, Ya Jun, Li Zhang, Yan Miao Ma, and Bin Liu. "The Dynamic Research of Industrial Sewing Machines Based on the Modal and Operational Deformation Analysis." Applied Mechanics and Materials 432 (September 2013): 269–74. http://dx.doi.org/10.4028/www.scientific.net/amm.432.269.

Full text

Abstract:

The vibration of the operational sewing machine is caused mostly by the fundamental frequency of the motor and its harmonic frequencies. The experimental modal analysis was conducted on a certain industrial sewing machine to identify its modal parameters. The operational deformation analysis was carried out and the actual deformation in the first six harmonic frequencies of the main speed frequency was obtained. Finally, the dynamic characteristic was identified by analyzing how each mode influences the harmonic vibration. This paper provides a valuable reference for noise reduction of the sew

APA, Harvard, Vancouver, ISO, and other styles

15

Anigbogu, Winner, and Hamzeh Bardaweel. "A Metamaterial-Inspired Structure for Simultaneous Vibration Attenuation and Energy Harvesting." Shock and Vibration 2020 (June 13, 2020): 1–12. http://dx.doi.org/10.1155/2020/4063025.

Full text

Abstract:

In this article, a magnetomechanical metamaterial structure capable of simultaneous vibration attenuation and energy harvesting is presented. The structure consists of periodically arranged local resonators combining cantilever beams and permanent magnet-coil systems. A prototype of the metamaterial dual-function structure is fabricated, and models are developed. Results show good agreement between model simulation and experiment. Two frequency bandgaps are measured: 205–257 Hz and 587–639 Hz. Within these bandgaps, vibrations are completely attenuated. The level of vibration attenuation in th

APA, Harvard, Vancouver, ISO, and other styles

16

A.V., Lun-Fu, Bubenchikov M.A., Jambaa S., and Tsydypov S.G.-Ts. "DETERMINING OF TRANSVERSE VIBRATION FREQUENCIES FOR CROSSOVERS AND DEAD ENDS OF GAS PIPELINES." Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika, no. 68 (2020): 95–105. http://dx.doi.org/10.17223/19988621/68/9.

Full text

Abstract:

The paper presents a stationary equation for bending deformations of a hollow rod derived by means of variational calculus. Further, the authors introduce into consideration an inertial term as consistent with a standard procedure and obtain the wave equation for pipe bending vibrations. Applying the method of separation of variables, the resulting hyperbolic equation of vibrations is reduced to an ordinary fourth-order differential equation for a standing wave on the axial line of the pipe. Fundamental solutions to the latter equation are referred to as the Krylov functions, while the standin

APA, Harvard, Vancouver, ISO, and other styles

17

Wang, Yang Yu, Shi Ming Ji, Dong Hui Wen, and Xian Zhang. "Experimental and Numerical Modal Analysis of Gearbox Casing in a Polishing Machinery." Advanced Materials Research 69-70 (May 2009): 560–64. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.560.

Full text

Abstract:

Vibrations in polishing machinery may affect the manual or automatic controls and reduce the efficiency of the operations to be carried out. In this article, an experimental and numerical analysis on the dynamic characteristic of a gearbox casing in polishing machinery have been carried out. The numerical investigation was achieved with NASTRAN based on a 3D FEM model and the experimental modal analysis for the determination of the natural frequencies and the associated eigenmodes of the gearbox casing with LMS structural vibration test system was performed. The fundamental modal parameters in

APA, Harvard, Vancouver, ISO, and other styles

18

Erturk, A., and D. J. Inman. "On the Fundamental Transverse Vibration Frequency of a Free-Free Thin Beam With Identical End Masses." Journal of Vibration and Acoustics 129, no. 5 (2007): 656–62. http://dx.doi.org/10.1115/1.2776341.

Full text

Abstract:

Current research in vibration-based energy harvesting and in microelectromechanical system technology has focused renewed attention on the vibration of beams with end masses. This paper shows that the commonly accepted and frequently quoted fundamental natural frequency formula for a beam with identical end masses is incorrect. It is also shown that the higher mode frequency expressions suggested in the referred work (Haener, J., 1958, “Formulas for the Frequencies Including Higher Frequencies of Uniform Cantilever and Free-Free Beams With Additional Masses at the Ends,” ASME J. Appl. Mech. 25

APA, Harvard, Vancouver, ISO, and other styles

19

Palakshi, Gouda M., K. Mallikarjuna, and E. UMA. "Analysis of the Vibration Characteristics of a Cantilever Beam Under Specific Boundary Conditions." International Journal of Computational Engineering and Management (IJCEM), A Peer Reviewed Refereed Multidisciplinary Research Journal 11, no. 1 (2020): 152–59. https://doi.org/10.5281/zenodo.15260724.

Full text

Abstract:

Cantilever beams are fundamental structural elements widely employed in various engineering disciplines. Understanding their vibration characteristics, particularly natural frequencies and mode shapes, is crucial for ensuring structural integrity and preventing resonance. This research article presents a comprehensive analysis of the vibration characteristics of a cantilever beam using analytical, numerical (Finite Element Method), and conceptual experimental approaches. The analytical method employs Euler-Bernoulli beam theory to derive the equations of motion and subsequently determine the n

APA, Harvard, Vancouver, ISO, and other styles

20

Li, Wei-Sha, Kang Yong Lee, and Xian-Fang Li. "Trapped modes in an infinite tube with inhomogeneity." Modern Physics Letters B 34, no. 04 (2019): 2050060. http://dx.doi.org/10.1142/s0217984920500608.

Full text

Abstract:

Symmetric and anti-symmetric trapped modes in a cylindrical tube with a segment of higher density are studied. The problem is reduced to an eigenvalue problem of the spatial Helmholtz equation subject to vanishing Dirichlet boundary condition in the cylindrical coordinate system. Through the domain decomposition method and matching technique, multiple frequency parameters are determined by solving the characteristic equation, and the corresponding n-fold periodic trapped modes can be constructed. It is found that in addition to the fundamental mode, the second- and higher-order trapped modes e

APA, Harvard, Vancouver, ISO, and other styles

21

Ding, Yewei, Yifan Zhang, Zheng Wang, Zizhen Gao, Tongyue Zhang, and Xiuling Huang. "Vibration test and comfort analysis of environmental and impact excitation for wooden floor structure." BioResources 15, no. 4 (2020): 8212–34. http://dx.doi.org/10.15376/biores.15.4.8212-8234.

Full text

Abstract:

To meet consumer requirements for comfort in wooden structure construction, test mode methods (the environmental excitation method and impact excitation method) have been used to test six measuring points of the flooring in a two-story residential light-wood structure. The following tests were performed: the fundamental frequency test of floor structure under environmental excitation mode; the ball excitation dynamic vibration test of single and rhythmic running of a basketball and tennis ball under impact excitation mode; and the pedestrian dynamic vibration test of jump, single-step, steady

APA, Harvard, Vancouver, ISO, and other styles

22

Ma, Liang, Jun Wang, and Guichang Zhang. "The Dynamic Characteristic of a Faulted Rotor System with Multi-Objective Optimization Designed SFD." Applied Sciences 9, no. 17 (2019): 3628. http://dx.doi.org/10.3390/app9173628.

Full text

Abstract:

As an important part of the turbomachinery, the rotor–bearing system has been upgraded to provide a high rotating speed in order to meet the demand of high power production. With increasing demand for stability, the squeeze film damper (SFD) has been widely used in industrial machinery because it can reduce the vibration amplitude and suppress the external force. Usually, it shows inadaptability under the different working conditions where the SFD parameters didn’t change appropriately. Therefore, the reasonable choice of operational parameters of SFD is the key solution that can provide visco

APA, Harvard, Vancouver, ISO, and other styles

23

Zhang, Lijuan, Yaohua Guo, Haijun Wang, Xuliang Yang, and Jijian Lian. "Research on Vibration Characteristics of an Underground Powerhouse of Large Pumped-Storage Power Station." Energies 15, no. 24 (2022): 9637. http://dx.doi.org/10.3390/en15249637.

Full text

Abstract:

With the rapid development of pumped storage, the vibration problems caused by the operation of power stations have become increasingly prominent. In this paper, a large-scale pumped-storage power station is taken as the research object, and a three-dimensional refined finite element model of the underground powerhouse including the surrounding rock mass is established. Based on the analysis of the vibration source of the powerhouse and the water diversion pipeline, the modal and dynamic response analysis of the underground powerhouse of the hydropower station is carried out, and the distribut

APA, Harvard, Vancouver, ISO, and other styles

24

Xie, Yuan, and Tao Zhang. "Fault Diagnosis for Rotating Machinery Based on Convolutional Neural Network and Empirical Mode Decomposition." Shock and Vibration 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/3084197.

Full text

Abstract:

The analysis of vibration signals has been a very important technique for fault diagnosis and health management of rotating machinery. Classic fault diagnosis methods are mainly based on traditional signal features such as mean value, standard derivation, and kurtosis. Signals still contain abundant information which we did not fully take advantage of. In this paper, a new approach is proposed for rotating machinery fault diagnosis with feature extraction algorithm based on empirical mode decomposition (EMD) and convolutional neural network (CNN) techniques. The fundamental purpose of our newl

APA, Harvard, Vancouver, ISO, and other styles

25

Li, Na, Shu-Xian Li, Lin Wang, et al. "Two-color resonance enhanced multiphoton ionization spectroscopy of o-hydroxybenzonitrile and Franck-Condon simulation." Acta Physica Sinica 71, no. 2 (2022): 023301. http://dx.doi.org/10.7498/aps.71.20211659.

Full text

Abstract:

The cyano group is a typical electron-withdrawing group, which has aroused the interest of relevant researchers. Many papers reported the dispersed fluorescence spectra of o-hydroxybenzonitrile, its dimers, and complexes with small molecules, aiming to study the intermolecule hydrogen bond and the vibration features of the electronic ground state. There are also reports on using fluorescence excitation spectra to study excited state vibrations, but no report on the systematical analyzing of the vibration features of excited state spectra. Compared with fluorescence spectroscopy, resonance enha

APA, Harvard, Vancouver, ISO, and other styles

26

Ventura, C. E., A. J. Felber, and S. F. Stiemer. "Determination of the dynamic characteristics of the Colquitz River Bridge by full-scale testing." Canadian Journal of Civil Engineering 23, no. 2 (1996): 536–48. http://dx.doi.org/10.1139/l96-058.

Full text

Abstract:

This paper presents the results of full-scale tests performed at the Colquitz River Bridge near Victoria, British Columbia (B.C.), Canada, during September 1992 to determine the dynamic characteristics of the structure. The five-span bridge was completed in 1954 and is part of the Trans-Canada Highway. It is 82.68 m long and 11.89 m wide, and has six continuous steel girders supporting a 175 mm thick concrete deck. This particular bridge was chosen for testing because of its typical nature of many B.C. bridges, its location in an area of high seismic risk, and its excellent site accessibility.

APA, Harvard, Vancouver, ISO, and other styles

27

Sahoo, S., and D. Chakravorty. "FiniteElement Vibration Characteristics of Composite Hypar Shallow Shells with Various Edge Supports." Journal of Vibration and Control 11, no. 10 (2005): 1291–309. http://dx.doi.org/10.1177/1077546305057260.

Full text

Abstract:

A review of the literature reveals that information regarding fundamental frequencies and mode shapes of shallow laminated composite hypar shells with practical civil engineering boundary conditions is not available. The present investigation aims to fill this gap by applying an eight-noded isoparametric shell element as the tool. Numerical experiments are carried out for different parametric variations including boundary conditions and stacking orders to obtain the fundamental frequencies and mode shapes. Some of the results are used for validating the correctness of the present approach by c

APA, Harvard, Vancouver, ISO, and other styles

28

Yang, Jin-Shui, Fang Yang, Liu Han, Li-Hong Yang, and Lin-Zhi Wu. "Vibration response of glass fiber composite multi-layer graded corrugated sandwich panels." Journal of Sandwich Structures & Materials 24, no. 2 (2021): 1491–511. http://dx.doi.org/10.1177/10996362211049540.

Full text

Abstract:

Based on the criteria of equal total height and relative density, a series of glass fiber composite multi-layer graded corrugated sandwich panels (MLGCSPs) with different configurations is designed and fabricated by an in-house hot-molding secondary molding method. The effects of arrangement modes, graded corrugated cores and corrugated topologies on the vibration behavior of the present MLGCSPs are comprehensively investigated by the vibration shaker tests. The results reveal that the arrangement modes, graded arrangement and topologies of the corrugated cores all have significant influences

APA, Harvard, Vancouver, ISO, and other styles

29

Liu, Zhan Hui, Wei Liu, Wei Cheng Gao, and Xiang Cheng. "Advances of Research on Mode Localization in Mistuned Cyclically Periodic Structures." Applied Mechanics and Materials 405-408 (September 2013): 3198–203. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.3198.

Full text

Abstract:

The mode localization phenomenon in mistuned cyclically periodic structures has been a hot spot in the past few decades. According to numbers of documents, the fundamental concepts, mechanism, main research methods, and the main results of mode localization are introduced; the current research status of the mode localization is summarized. The possiblity of mode localization in a telescope reflector model has been analyzed by using Finite Element Method. We also illustrate the problems for further studies, including: the unified modeling and analysis theory with more extensive applicability an

APA, Harvard, Vancouver, ISO, and other styles

30

Xu, Hongzhi, Nanfei Wang, Dongxiang Jiang, Te Han, and Dewang Li. "Dynamic Characteristics and Experimental Research of Dual-Rotor System with Rub-Impact Fault." Shock and Vibration 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/6239281.

Full text

Abstract:

Rub-impact fault model for dual-rotor system was further developed, in which rubbing board is regarded as elastic sheet. Sheet elastic deformation, contact penetration, and elastic damping support during rubbing of sheet and wheel disk were considered. Collision force and friction were calculated by utilizing Hertz contact theory and Coulomb model and introducing nonlinear spring damping model and friction coefficient. Then kinetic differential equations of rub-impact under dry rubbing condition were established. Based on one-dimensional finite element model of dual-rotor system, dynamic trans

APA, Harvard, Vancouver, ISO, and other styles

31

Sekine, Koji. "Free Vibration Characteristics of Thin Spherical Shells." EPI International Journal of Engineering 4, no. 2 (2021): 196–203. http://dx.doi.org/10.25042/10.25042/epi-ije.082021.12.

Full text

Abstract:

Free vibration characteristics of thin spherical shells having freely boundary conditions are analyzed. In this study, the fundamental properties of natural vibration for the spherical shells are investigated. The power function is employed as the admissible function, displacement functions satisfying the geometric boundary conditions are expressed in the form of single series. The eigenvalue problem for free vibration of the shells derived by using the Lagrange’s equation of motion, is processed numerically to acquire the natural frequencies and mode shapes. The reliability and accuracy of th

APA, Harvard, Vancouver, ISO, and other styles

32

Hurai, V., M. Wierzbicka-Wieczorek, M. Pentrák, et al. "X-Ray Diffraction and Vibrational Spectroscopic Characteristics of Hydroxylclinohumite from Ruby-Bearing Marbles (Luc Yen District, Vietnam)." International Journal of Mineralogy 2014 (January 29, 2014): 1–11. http://dx.doi.org/10.1155/2014/648530.

Full text

Abstract:

A honey-yellow hydroxylclinohumite from ruby-bearing marbles of the Luc Yen district in northern Vietnam was characterized by electron microprobe (EPMA), single-crystal X-ray diffraction (XRD), micro-Raman, and Fourier-transform infrared (FTIR) spectroscopy. The studied crystals correspond to nearly ideal clinohumite with the structural formula 4[Mg2SiO4]·[(Mg,Fe,Ti)(OH,F)2] and roughly equal F and OH proportions. Crystal structure analysis showed Ti substitution for Mg only at the Mg3 site. A Fourier-difference map revealed one hydrogen site associated with ninth oxygen atom. The calculated O

APA, Harvard, Vancouver, ISO, and other styles

33

Liang, Feng, Xiao-Dong Yang, Wei Zhang, and Ying-Jing Qian. "Nonlinear Free Vibration of Spinning Viscoelastic Pipes Conveying Fluid." International Journal of Applied Mechanics 10, no. 07 (2018): 1850076. http://dx.doi.org/10.1142/s175882511850076x.

Full text

Abstract:

Drill strings are one of the most significant rotor components employed in oil and gas exploitation. In this paper, an improved dynamical model of drill-string-like pipes conveying fluid is developed by taking into account the axial spin, fluid–structure interaction (FSI), damping as well as curvature and inertia nonlinearities. The partial differential equations of motion are derived by two sequential Euler angles and the Hamilton principle and then directly handled by the multiple scales method. The nonlinear amplitudes, frequencies and whirling mode shapes are all investigated towards vario

APA, Harvard, Vancouver, ISO, and other styles

34

Wang, Xiaoyu, and Shuyu Lin. "Analysis on the Radial Vibration of Longitudinally Polarized Radial Composite Tubular Transducer." Sensors 20, no. 17 (2020): 4785. http://dx.doi.org/10.3390/s20174785.

Full text

Abstract:

The radial vibration of a radial composite tubular transducer with a large radiation range and power capacity is studied. The transducer is composed of a longitudinally polarized piezoelectric ceramic tube and a coaxial outer metal tube. Assuming that the longitudinal length is much larger than the radius, the electromechanical equivalent circuits of the radial vibration of a piezoelectric ceramic long tube and a metal long tube are derived and obtained for the first time following the plane strain theory. As per the condition of the continuous forces and displacements of two contact surfaces,

APA, Harvard, Vancouver, ISO, and other styles

35

Si, Wenrong, Weiqiang Yao, Hong Guan, et al. "Numerical Study of Vibration Characteristics for Sensor Membrane in Transformer Oil." Energies 14, no. 6 (2021): 1662. http://dx.doi.org/10.3390/en14061662.

Full text

Abstract:

Membrane is the most important element of extrinsic Fabry-Perot interferometer sensors. Studying the relationship between working medium viscosity and membrane vibration characteristics are critical to the sensor design because the transformer oil viscosity will cause viscous loss during membrane vibration. The numerical investigation of membrane vibration characteristics in transformer oil is performed based on the finite element method. Besides, the effect of energy loss caused by viscosity is examined. It is firstly showed that the membrane has the highest sensitivity for the first-order vi

APA, Harvard, Vancouver, ISO, and other styles

36

Zhang, Shao Jian, Suet To, and Chi Fai Cheung. "Nonlinear Dynamics of Tool Vibration in Micro-Cutting." Key Engineering Materials 516 (June 2012): 645–50. http://dx.doi.org/10.4028/www.scientific.net/kem.516.645.

Full text

Abstract:

This study focuses on the nonlinear dynamic characteristics of tool vibration in ultra precision diamond turning. Considering the first mode vibration of a tool, the tool is modelled as a one degree of freedom spring-mass-damper system with a developed cutting force model. Numerical simulations were carried out to anlyze the nonlinear dynamics of the system, using bifurcation diagrams, Poincaré maps, phase protraits, time histories and power spectral densities. The results indicated that the dynamic response of the tool is dominantly periodic and harmonic at its natural frequency with a little

APA, Harvard, Vancouver, ISO, and other styles

37

Parajuli, Hari Ram, Junji Kiyono, Masatoshi Tatsumi, et al. "Dynamic Characteristic Investigation of a Historical Masonry Building and Surrounding Ground in Kathmandu." Journal of Disaster Research 6, no. 1 (2011): 26–35. http://dx.doi.org/10.20965/jdr.2011.p0026.

Full text

Abstract:

Saving human lives and cultural heritage from natural disasters is a key to earthquake-disaster mitigation strategies. Culturally valued structures built before earthquake codes and regulations emerged are often vulnerable to earthquake loads, but such structures must be comprehensively studied before applying mitigation measures. Microtremor measurements in Patan Durbar Square area, a World Heritage site, were investigated to determine dynamic properties of the soil at four locations and the predominant ground frequency calculated to be 2.07 Hz. Ambient vibration in an old masonry building wa

APA, Harvard, Vancouver, ISO, and other styles

38

Hatami, Hamed, Ahmad Bagheri, and Reza Ansari. "An Analytical Investigation for Vibration Characteristics of a Beam-Type Liquid Micro-Pump." International Journal of Applied Mechanics 12, no. 02 (2020): 2050016. http://dx.doi.org/10.1142/s1758825120500167.

Full text

Abstract:

This paper studies the characteristics of a micro-beam interacting with an incompressible fluid in a fluid chamber with an opening in its bottom face for fluid flow. The Euler–Bernoulli equation for transverse deformation of an elastic beam is coupled with the fundamental hydrodynamic equation, which is solved by Galerkin and separation of variables method. The 2D fluid flow assumption in Cartesian coordinate has been used. Natural frequencies and mode shapes of wet beam are calculated and compared with the dry beam. The effects of geometrical parameter changes are also computed as a benchmark

APA, Harvard, Vancouver, ISO, and other styles

39

Tsai, Y. M. "Longitudinal Motion of a Thick Transversely Isotropic Hollow Cylinder." Journal of Pressure Vessel Technology 113, no. 4 (1991): 585–89. http://dx.doi.org/10.1115/1.2928799.

Full text

Abstract:

The propagation of a longitudinal harmonic wave in a transversely isotropic shell has been investigated in the development of ultrasonic techniques for thick hollow composite cylinders. The characteristic equation for satisfying the stress-fee inner and outer cylindrical boundaries has been obtained in an exact form in terms of the wavelength, the cylinder radii and the material constants. The phase velocity of the fundamental mode is calculated for a wide range of the wavelength for various cylinder radii for some typical sample materials. The shell wave speeds for the second mode of vibratio

APA, Harvard, Vancouver, ISO, and other styles

40

GLOBUS, T., D. WOOLARD, M. BYKHOVSKAIA, B. GELMONT, L. WERBOS, and A. SAMUELS. "THZ-FREQUENCY SPECTROSCOPIC SENSING OF DNA AND RELATED BIOLOGICAL MATERIALS." International Journal of High Speed Electronics and Systems 13, no. 04 (2003): 903–36. http://dx.doi.org/10.1142/s0129156403002083.

Full text

Abstract:

The terahertz frequency absorption spectra of DNA molecules reflect low-frequency internal helical vibrations involving rigidly bound subgroups that are connected by the weakest bonds, including the hydrogen bonds of the DNA base pairs, and/or non-bonded interactions. Although numerous difficulties make the direct identification of terahertz phonon modes in biological materials very challenging, recent studies have shown that such measurements are both possible and useful. Spectra of different DNA samples reveal a large number of modes and a reasonable level of sequence-specific uniqueness. Th

APA, Harvard, Vancouver, ISO, and other styles

41

Mohiuddin, Md, Asma Akther, Eun Byul Jo, Hyun Chan Kim, and Jaehwan Kim. "Fabrication and finite element analysis of vibrating parallel film actuator made with cellulose acetate for potential haptic application." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 15 (2016): 2720–27. http://dx.doi.org/10.1177/0954406215598802.

Full text

Abstract:

The present study investigates a film actuator made with dielectric cellulose acetate films separated by narrow spacers as a means of electrostatic actuation for potential haptic application. Fabrication process for the actuator is explained along with experiments conducted over a wide frequency range of actuation frequency. A valid finite element simulation of the actuator is made on the quarter section of the actuator by using full 3D finite elements. Vibration characteristics such as fundamental natural frequency, mode shape and output velocity in the frequency range for haptic feeling gene

APA, Harvard, Vancouver, ISO, and other styles

42

PriyankaTiwari*1, Nikhilesh N. Singh2 &. Dr. Prabhat Kumar Sinha3. "STUDY& VIBRATION ANALYSISIN ELASTIC CRACKED BEAM BY FEM & ANSYS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 7 (2017): 830–37. https://doi.org/10.5281/zenodo.834552.

Full text

Abstract:

In the current research, the natural frequency of a beam with a crack, is investigated numerically by finite part methodology victimization analysis software system ANSYS APDL 15.0. In this research” Vibration Analysis of Elastic Cracked Beam” the response characteristics of a beam is predicted for both intact and cracked beams. In addition to that the response characteristics for different crack depth were studied. Crack depth and location were main parameters for vibration analysis. So it becomes for very important monitor to change the response parameters of structures to access structural

APA, Harvard, Vancouver, ISO, and other styles

43

Zannon, Mohammad. "Fundamental Frequency of Laminated Composite Thick Spherical Shells." Journal of Mathematics Research 11, no. 1 (2019): 57. http://dx.doi.org/10.5539/jmr.v11n1p57.

Full text

Abstract:

In this study, we apply third-order shear deformation thick shell theory to analytically derive the frequency characteristics of the free vibration of thick spherical laminated composite shells. The equations of motion are derived using Hamilton&rsquo;s principle of minimum energy and on the basis of the relationships between forces, moments, and stress displacements in the shell.  We confirm the derived equations and analytical results through the finite element technique by using the well-known software packages MATLAB and ANSYS. We consider the fundamental natural frequencie

APA, Harvard, Vancouver, ISO, and other styles

44

Huang, Zhicheng, Yang Li, Yang Cheng, and Xingguo Wang. "Finite element modeling and vibration control of composite beams with partially covered active constrained layer damping." Sound & Vibration 59, no. 1 (2024): 1765. http://dx.doi.org/10.59400/sv1765.

Full text

Abstract:

This paper analyzes the active vibration control of sandwich beams using Active Constrained Layer Damping (ACLD). The finite element model of the viscoelastic sandwich beam combines finite element method with the Golla Hughes McTavish (GHM) model, using a 2-node 8 degrees freedom element. The finite element model is validated by the first four natural frequencies of the model in the literature, and the governing equations of sandwich beams are generated based on the Hamiltonian principle. The physical space dynamic condensation technique and state space complex mode decoupling method are emplo

APA, Harvard, Vancouver, ISO, and other styles

45

JEYARAJ, P. "BUCKLING AND FREE VIBRATION BEHAVIOR OF AN ISOTROPIC PLATE UNDER NONUNIFORM THERMAL LOAD." International Journal of Structural Stability and Dynamics 13, no. 03 (2013): 1250071. http://dx.doi.org/10.1142/s021945541250071x.

Full text

Abstract:

This paper presents numerical simulation studies on buckling and free vibration characteristics of isotropic plates under arbitrarily varying temperature distributions using finite element method (FEM). First the critical buckling temperature is obtained, followed by modal analysis considering pre-stress due to the thermal field in the plate, with the critical buckling temperature as a parameter. It is found that anti-nodal position of the fundamental buckling mode appears away/near to the free edge when the free edge is exposed to minimum/maximum temperature of the variation. The nodal and an

APA, Harvard, Vancouver, ISO, and other styles

46

Atef, Mahmoud M., Wael Khair-Eldeen, Jiwang Yan, and Mohamed G. A. Nassef. "Investigating the Combined Effect of Multiple Dent and Bump Faults on the Vibrational Behavior of Ball Bearings." Machines 10, no. 11 (2022): 1062. http://dx.doi.org/10.3390/machines10111062.

Full text

Abstract:

The rolling element bearing is a fundamental component of any rotating machinery. During operation, wear debris and lubricant impurities create dents and bumps on the bearing raceway surfaces. Such localized defects produce transient vibration impulses at one of the bearing characteristic frequencies. Having a combination of multiple types of point defects on the raceway results in superimposed vibration patterns, which reduce the ability to recognize these defects’ effects. In this paper, a 6-DOF dynamic model is developed to accurately investigate the vibration characteristic of a ball beari

APA, Harvard, Vancouver, ISO, and other styles

47

Huseynov, T. K., T. T. Gadirova, B. K. Amiraslanov, N. A. Abdulova, A. I. Quliyeva, and K. R. Haciyeva. "Theoretical and experimental study of vibration-amplitude liquid densimeter on the basis of a high-quality tubular resonator." E3S Web of Conferences 124 (2019): 03004. http://dx.doi.org/10.1051/e3sconf/201912403004.

Full text

Abstract:

This paper is devoted to the current model of vibration-amplitude liquid densimeter developed by the authors. Firstly, the necessity to develop vibration-amplitude liquids densimeters with straigt-flow sensing elements (resonators) belonging to the “low cost low accuracy” category is justified. The resonator structure, developed as the result of the search using the heuristic method, is described. The proposed resonator is a tube rigidly fixed at the ends with additional weights attached symmetrically at the vertical axis at the points of the antinodes of the second fundamental oscillation mod

APA, Harvard, Vancouver, ISO, and other styles

48

Alshabatat, Nabeel. "Design of Corrugated Plates for Optimal Fundamental Frequency." Advances in Acoustics and Vibration 2016 (July 18, 2016): 1–9. http://dx.doi.org/10.1155/2016/4290247.

Full text

Abstract:

This paper investigates shifting the fundamental frequency of plate structures by corrugation. Creating corrugations significantly improves the flexural rigidities of plate and hence increases its natural frequencies. Two types of corrugations are investigated: sinusoidal and trapezoidal corrugations. The finite element method (FEM) is used to model the corrugated plates and extract the natural frequencies and mode shapes. The effects of corrugation geometrical parameters on simply supported plate fundamental frequency are studied. To reduce the computation time, the corrugated plates are mode

APA, Harvard, Vancouver, ISO, and other styles

49

Zhang, Xinxing, Minghan Hu, Jiancheng Cai, Andrii Babenko, E. Shiju, and Zisheng Xu. "Numerical Simulation of Vortex-Induced Transverse Vibration of a Cylinder with Very Low Mass Ratio." Shock and Vibration 2022 (October 4, 2022): 1–13. http://dx.doi.org/10.1155/2022/3520982.

Full text

Abstract:

Vortex-induced vibration (VIV) of flow past different types of cylinders is important in many engineering fields and has led to a large number of fundamental studies. Computational fluid dynamics (CFD) has become a powerful tool to investigate VIV problems. In this paper, the VIV of an elastically supported rigid-body circular cylinder was numerically studied by solving the Reynolds-averaged Navier–Stokes (RANS) equations with the shear stress transport (SST) k-ω turbulence model. The dynamic mesh approach was used to tackle the domain mesh change due to the cylinder motion. The characteristic

APA, Harvard, Vancouver, ISO, and other styles

50

Sadjadi, SeyedAbdolreza, and Quentin Parker. "The Astrochemistry Implications of Quantum Chemical Normal Modes Vibrational Analysis." Galaxies 6, no. 4 (2018): 123. http://dx.doi.org/10.3390/galaxies6040123.

Full text

Abstract:

Understanding the molecular vibrations underlying each of the unknown infrared emission (UIE) bands (such as those found at 3.3, 3.4, 3.5, 6.2, 6.9, 7.7, 11.3, 15.8, 16.4, 18.9 μ m) observed in or towards astronomical objects is a vital link to uncover the molecular identity of their carriers. This is usually done by customary classifications of normal-mode frequencies such as stretching, deformation, rocking, wagging, skeletal mode, etc. A large literature on this subject exists and since 1952 ambiguities in classifications of normal modes via this empirical approach were pointed out by Morin

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!