Vibration analysis of the rudder drive system of an underwater glider

Guo, Liming; Yang, Chiye; Liu, Jing; Cao, Yong; Pan, Guang; Song, Baowei

doi:10.1504/ijhm.2022.123134

Cited by 8 publications

(2 citation statements)

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“…Therefore, the transfer matrix for the entire model can be determined by T = T A (N)T B T A (N). The determination of S A (N) and C A (N) in Equation (8) depends on the size of the parameter |(λ A +µ A )/2|; the λ A and µ A values are expressed in Equation (7). Substituting α 1 , α 2 , Z A 1 , and Z A 2 into |(λ A +µ A )/2| for the threshold calculation, the result is that |(λ A +µ A )/2| < 1, and it claims that the value of S A (N) and [35].…”

Section: Transfer Matrix Model Of Phononic Lattice Meta-structurementioning

confidence: 99%

“…Li and Yan propose hybrid expanded elastic metamaterials that may be a candidate for subwavelength-scale vibration-attenuating structures [ 6 ]. At present, metamaterials have been extensively studied in marine ships and show great potential in engineering applications such as underwater gliders [ 7 ], mechanical drivetrains [ 8 ], and ships [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

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Meta-Structure Hull Design with Periodic Layered Phononic Crystals Theory for Wide-Band Low-Frequency Sound Insolation

Zhang

Tao

et al. 2023

Materials

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The hulls of marine vehicles are generally very effective at attenuating airborne acoustic noise generated by their powertrains. However, conventional hull designs are generally not very effective at attenuating wide-band low-frequency noise. Meta-structure concepts offer an opportunity for the design of laminated hull structures tailored to address this concern. This research proposes a novel meta-structure laminar hull concept using periodic layered Phononic crystals to optimize the sound insolation performance on the air–solid side of the hull structure. The acoustic transmission performance is evaluated using the transfer matrix, the acoustic transmittance, and the tunneling frequencies. The theoretical and numerical models for a proposed thin solid-air sandwiched meta-structure hull indicate ultra-low transmission within a 50-to-800 Hz frequency band and with two predicted sharp tunneling peaks. The corresponding 3D-printed sample experimentally validates the tunneling peaks at 189 Hz and 538 Hz, with 0.38 and 0.56 transmission magnitudes, respectively, with the frequency band between those values showing wide-band mitigation. The simplicity of this meta-structure design provides a convenient way to achieve acoustic band filtering of low frequencies for marine engineering equipment and, accordingly, an effective technique for low-frequency acoustic mitigation.

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Section: Transfer Matrix Model Of Phononic Lattice Meta-structurementioning

confidence: 99%