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  • Hongxing, Hua  (7)
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  • 1
    Online Resource
    Online Resource
    Design and optimization of periodic structure mechanical filter in suppression of foundation resonances
    Elsevier BV ; 2011
    In:  Journal of Sound and Vibration Vol. 330, No. 20 ( 2011-9), p. 4689-4712
    Details
    In: Journal of Sound and Vibration, Elsevier BV, Vol. 330, No. 20 ( 2011-9), p. 4689-4712
    Type of Medium: Online Resource
    ISSN: 0022-460X
    URL: Article
    DOI: 10.1016/j.jsv.2011.05.027
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2011
    detail.hit.zdb_id: 1471444-9
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  • 2
    Online Resource
    Online Resource
    Modeling and optimization of floating raft systems in submarines under different objectives by using hybrid genetic algorithm
    SAGE Publications ; 2012
    In:  Journal of Vibration and Control Vol. 18, No. 2 ( 2012-02), p. 268-297
    Details
    In: Journal of Vibration and Control, SAGE Publications, Vol. 18, No. 2 ( 2012-02), p. 268-297
    Abstract: A systematic modeling and optimization method for analyzing typical floating raft systems in submarines is presented and optimization under different vibro-acoustic objectives is investigated. The Frequency Response Function-based (FRF-based) substructuring method and the coupled Finite Element/Boundary Element (FE/BE) method are employed to study vibration transmission from the vibrating machinery to the base structure as well as the vibro-acoustic behavior of the fluid- loaded cylindrical structure. The hybrid genetic algorithm (HGA) involving the FRF-based substructuring sensitivity analysis (SA) and the genetic algorithm (GA) is developed and applied to obtain the optimal values of stiffness of isolators under five objective functions at low frequencies. Optimization is carried out for two cases where the fluid–structure interaction is considered and neglected respectively. The modeling results demonstrate that the effect of fluid-loading reduces the driving point mobility of the connecting points on the base structure but has little influence on the isolation frequencies of the whole floating raft system. The optimized results are compared with those obtained by SA and GA. The results of SA show a regular trend of variation while those of GA show an irregular trend. Since GA is a stochastic optimization technique, the trend of variation in the results of HGA combines those of GA and SA. The optimized results demonstrate that HGA possesses the merits of SA and GA, and never gets trapped at a local optimum or goes into premature convergence. Compared with SA and GA, however, it requires more evaluation of objective functions in each iteration step and as a result is not computationally efficient.
    Type of Medium: Online Resource
    ISSN: 1077-5463 , 1741-2986
    URL: Article
    DOI: 10.1177/1077546311403184
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2012
    detail.hit.zdb_id: 2070247-4
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  • 3
    Online Resource
    Online Resource
    A study on the isolation performance of trichiral lattices with gradient geometry
    SAGE Publications ; 2015
    In:  Journal of Vibration and Control Vol. 21, No. 16 ( 2015-12), p. 3465-3475
    Details
    In: Journal of Vibration and Control, SAGE Publications, Vol. 21, No. 16 ( 2015-12), p. 3465-3475
    Abstract: This paper investigates the vibration transmission and isolation performance of the trichiral structures with uniform and gradient geometry parameter. The method combining Bloch’s theorem and the finite element method (FEM) are applied to study the dispersion characteristic of the trichiral structure. The effect of geometry parameters on the distribution of the band gap is analyzed. On this basis, a trichiral structure with gradient geometry parameters is presented and FEM is exploited to evaluate the dynamic response under the harmonic excitation. The results demonstrate that vibration transmission displays significant attenuation in the frequency range corresponding to the band gap. The distribution of the band gap is determined by the cell parameters and can be tuned to any desired frequency range. The harmonic response analysis suggests that a gradual variation in cell size distribution makes the structure realize vibration suppression in a wider frequency band, which cannot be achieved by the uniform structure.
    Type of Medium: Online Resource
    ISSN: 1077-5463 , 1741-2986
    URL: Article
    DOI: 10.1177/1077546314524261
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2015
    detail.hit.zdb_id: 2070247-4
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  • 4
    Online Resource
    Online Resource
    Research on Wave Mode Conversion of Curved Beam Structures by the Wave Approach
    ASME International ; 2013
    In:  Journal of Vibration and Acoustics Vol. 135, No. 3 ( 2013-06-01)
    Details
    In: Journal of Vibration and Acoustics, ASME International, Vol. 135, No. 3 ( 2013-06-01)
    Abstract: A general wave approach for the vibration analysis of curved beam structures is presented. The analysis is based on wave propagation, transmission, and reflection, including the effects of both propagating and decaying near-field wave components. A matrix formulation is used that offers a systematic and concise method for tackling free and forced vibrations of complex curved beam structures. To illustrate the effectiveness of the approach, several numerical examples are presented. The predictions made using the wave approach are shown to be in excellent agreement with a conventional finite element analysis, with the advantage of reduced computational costs and good conditioning number of the characteristic equation. The developed wave approach is applied to investigate the free vibration, vibration transmission, and power flow of built-up structures consisting of curved beams, straight beams, and masses, with the aim for designing vibration isolation structure with high attenuation ability. Wave reflection and transmission in the infinite curved beam structure, as well as vibration and energy transmission in coupled finite curved beam structure are investigated. Numerical results show that wave mode conversion takes place for the reflected and transmitted wave propagating through a curved beam, and the power flow in the coupled curved beam structure shows energy attenuation and conversion by curved beam and the discontinuities. The investigation will shed some light on the designing of curved beam structures.
    Type of Medium: Online Resource
    ISSN: 1048-9002 , 1528-8927
    URL: Article
    DOI: 10.1115/1.4023817
    Language: English
    Publisher: ASME International
    Publication Date: 2013
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  • 5
    Online Resource
    Online Resource
    Performance of a zero stiffness isolator under shock excitations
    SAGE Publications ; 2014
    In:  Journal of Vibration and Control Vol. 20, No. 14 ( 2014-10), p. 2090-2099
    Details
    In: Journal of Vibration and Control, SAGE Publications, Vol. 20, No. 14 ( 2014-10), p. 2090-2099
    Abstract: The characteristic of a zero stiffness isolator is given first and the stiffness difference between the zero stiffness isolator and a linear one is discussed. Three different types of displacement shock excitations are applied to the base of the zero stiffness isolator and the linear isolator. Three indices are defined to analyze the characteristics and evaluate the performance of the nonlinear isolator. The absolute displacement shock responses in time domain and the maximum absolute displacement ratio for the undamped linear and nonlinear systems are presented for different shock severity parameters. The performance of the damped nonlinear isolator is studied and compared with that of the linear isolator. Results show that the performances of the nonlinear isolator are related to the parameters of the nonlinear isolator and the type of the shock excitation. It is beneficial to introduce a zero stiffness isolator for shock excitations, but the performance is limited by certain conditions. Some useful conclusions which can be used to design this kind of isolator for considering shock isolation are given.
    Type of Medium: Online Resource
    ISSN: 1077-5463 , 1741-2986
    URL: Article
    DOI: 10.1177/1077546312473767
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2014
    detail.hit.zdb_id: 2070247-4
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  • 6
    Online Resource
    Online Resource
    Optimal parameters for dynamic vibration absorber with negative stiffness in controlling force transmission to a rigid foundation
    Elsevier BV ; 2019
    In:  International Journal of Mechanical Sciences Vol. 152 ( 2019-03), p. 88-98
    Details
    In: International Journal of Mechanical Sciences, Elsevier BV, Vol. 152 ( 2019-03), p. 88-98
    Type of Medium: Online Resource
    ISSN: 0020-7403
    URL: Article
    DOI: 10.1016/j.ijmecsci.2018.12.033
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2019
    detail.hit.zdb_id: 1498168-3
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  • 7
    Online Resource
    Online Resource
    Multi-channel Active Vibration Isolation for the Control of Underwater Sound Radiation From A Stiffened Cylindrical Structure: A Numerical Study
    ASME International ; 2012
    In:  Journal of Vibration and Acoustics Vol. 134, No. 1 ( 2012-02-01)
    Details
    In: Journal of Vibration and Acoustics, ASME International, Vol. 134, No. 1 ( 2012-02-01)
    Abstract: Numerical simulation of vibration control of a submerged stiffened cylindrical structure with active vibration isolators is presented. Vibration transmission from vibrating machinery to the cylindrical structure through the active vibration isolators is analyzed by a numerical model synthesized from frequency response functions (FRFs) and impedances. The coupled finite element/boundary element (FE/BE) method is employed to study the vibro-acoustic behavior of the fluid-loaded cylindrical structure. Sound pressure in the far-field is calculated in terms of the pressure and normal acceleration of the outer surface of the cylindrical shell. An adaptive multichannel control based on the filtered-x least mean squares (FxLMS) algorithm is used in the active vibration isolation. Simulation results have demonstrated that suppression of vibration of the four elastic foundations attached to the cylindrical shell will reduce the spatial-average mean-square velocity and the instantaneous radiated power of the cylindrical shell. As a result, suppression of vibration of the foundations leads to attenuation of sound radiation in the far-field induced by the radial displacement dominant mode of the shell. Moreover, vibration suppression is greatly influenced by the strong couplings among control channels. According to these results, it can be concluded that the proposed method is effective in the analysis of underwater sound radiation control of cylindrical structures.
    Type of Medium: Online Resource
    ISSN: 1048-9002 , 1528-8927
    URL: Article
    DOI: 10.1115/1.4004684
    Language: English
    Publisher: ASME International
    Publication Date: 2012
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