RESEARCH ON ANALYTICAL METHOD OF CIRCULAR CYLINDRICAL SCATTERED WAVE PRESSURE SUBJECTED TO UNDERWATER EXPLOSION

YAN Qiu-shi; ZHANG Zhi-jie; WANG Pi-guang; BAO Xin; LI Shu-tao

doi:10.6052/j.issn.1000-4750.2021.04.0249

Volume 39 Issue 7

Jun. 2022

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Engineering Mechanics > 2022 > 39(7): 247-256. > DOI: 10.6052/j.issn.1000-4750.2021.04.0249

YAN Qiu-shi, ZHANG Zhi-jie, WANG Pi-guang, BAO Xin, LI Shu-tao. RESEARCH ON ANALYTICAL METHOD OF CIRCULAR CYLINDRICAL SCATTERED WAVE PRESSURE SUBJECTED TO UNDERWATER EXPLOSION[J]. Engineering Mechanics, 2022, 39(7): 247-256. DOI: 10.6052/j.issn.1000-4750.2021.04.0249

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RESEARCH ON ANALYTICAL METHOD OF CIRCULAR CYLINDRICAL SCATTERED WAVE PRESSURE SUBJECTED TO UNDERWATER EXPLOSION

1.
Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China
2.
Department of Civil Engineering, Tsinghua University, Beijing 100084, China

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Received Date: April 04, 2021
Revised Date: May 27, 2021
Available Online: June 17, 2021

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Abstract

Abstract

In order to improve the anti-blast and protection design of offshore structures such as bridges and wharves, this paper proposes an efficient analytical method for calculating the circular cylindrical scattered wave pressure subjected to underwater explosion, aiming at the common cylindrical structures with constant cross-sections in offshore structures. Based on the theory of diffracted waves, this paper derives the time-domain solution of the scattered wave pressure of the cylindrical structure by the method of separation of variables in the cylindrical coordinate system according to the water body state equation and boundary conditions; The calculation accuracy of the scattered wave pressure time-domain solution proposed in this paper is verified by numerical simulation comparison. The numerical example shows that the calculation errors of the two methods are within the engineering allowable range. Based on the time-domain substructure analysis method that considers the compressibility of water, by comparing the analytical methods proposed in this paper without considering the compressibility of water, the influence of water compressibility on scattered wave pressure is analyzed.
- underwater explosion,
- scattered wave pressure,
- circular cylinder,
- diffraction wave theory,
- water compressibility

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RESEARCH ON ANALYTICAL METHOD OF CIRCULAR CYLINDRICAL SCATTERED WAVE PRESSURE SUBJECTED TO UNDERWATER EXPLOSION

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