Acoustic Radiation Characteristics of Liquid-Filled Pipelines Coupled with Plates and Shells under Mechanical Force Excitation

ZHANG Rongli; LI Zhen; LIU Bilong

doi:10.11993/j.issn.2096-3920.2026-0119

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ZHANG Rongli, LI Zhen, LIU Bilong. Acoustic Radiation Characteristics of Liquid-Filled Pipelines Coupled with Plates and Shells under Mechanical Force Excitation[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0119

Citation:

ZHANG Rongli, LI Zhen, LIU Bilong. Acoustic Radiation Characteristics of Liquid-Filled Pipelines Coupled with Plates and Shells under Mechanical Force Excitation[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0119

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Acoustic Radiation Characteristics of Liquid-Filled Pipelines Coupled with Plates and Shells under Mechanical Force Excitation

doi: 10.11993/j.issn.2096-3920.2026-0119

School of Urban Construction, Qingdao University of Technology, Qingdao 266525, China

Received Date: 2026-07-02
Accepted Date: 2026-08-21
Rev Recd Date: 2026-08-17

Available Online: 2026-11-13

Abstract

Abstract

A hybrid computational method combining the transfer matrix method and the finite element method is developed to investigate the vibro-acoustic response and acoustic radiation characteristics of liquid-filled pipelines coupled with plate/shell structures. In this method, the transfer matrix method is employed to analytically model complex pipeline sections, while the finite element method is used to simulate the plate/shell structures and external acoustic field. The two methods are coupled through the impedance synthesis at the coupling interface by enforcing the continuity conditions of force and displacement. Taking liquid-filled pipelines coupled with elastic plates, including straight pipes and two types of bent pipes, as examples, the effects of bend configurations, elastic baffle dimensions, and pipe diameter on the acoustic radiation at the monitoring point under mechanical force excitation are investigated. The results show that the acoustic radiation from the elastic plate dominates in most cases. However, with increasing pipe diameter or decreasing baffle size, the contribution of pipe outlet radiation increases significantly and becomes comparable to or even exceeds that of the elastic plate radiation in some cases. The relative contributions of pipe outlet and elastic plate radiation are governed by pipeline configurations, excitation directions, and structural parameters, showing distinct radiation characteristics.
- transfer matrix method,
- hybrid method,
- fluid-filled pipeline,
- elastic baffle,
- acoustic radiation

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References(18)

References

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