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J.H. Song, S. Yao, D. Chen, J. Du, G.B. Li, S. Ding, "Influence of Resonant Cavity Structures on Micro-Pressure Waves of High-Speed Maglev Tunnels", in J. Pombo, (Editor), "Proceedings of the Seventh International Conference on Railway Technology: Research, Development and Maintenance ", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 15, Paper 5.3, 2026, doi:10.4203/ccc.15.5.3

Keywords: high-speed maglev train, compression wave, micro-pressure wave, resonator, numerical simulation, moving model rig.

Abstract

The high-speed maglev train can operate at speeds exceeding 600 km/h, generating intense micro-pressure waves at tunnel exits when passing through tunnels. To mitigate this issue, a tunnel-installed resonant cavity structure is proposed in this study. Numerical simulations are performed to analyze its aerodynamic mitigation characteristics, and both numerical comparisons and moving model tests are adopted to verify the mitigation effect on micro-pressure waves. The results demonstrate that the resonant cavity can dissipate compression wave energy and reduce the pressure gradient, thus significantly weakening the micro-pressure wave at the tunnel portal. The mitigation efficiencies at 20 m and 50 m from the tunnel exit reach 41.87% and 40.15%, respectively. Moving model tests further validate the accuracy of the optimal scheme determined by numerical simulation.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 15 PROCEEDINGS OF THE SEVENTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 5.3 Influence of Resonant Cavity Structures on Micro-Pressure Waves of High-Speed Maglev Tunnels J.H. Song, S. Yao, D. Chen, J. Du, G.B. Li and S. Ding , CRRC Qingdao Sifang Co., Ltd., China doi:10.4203/ccc.15.5.3 Full Bibliographic Reference for this paper J.H. Song, S. Yao, D. Chen, J. Du, G.B. Li, S. Ding, "Influence of Resonant Cavity Structures on Micro-Pressure Waves of High-Speed Maglev Tunnels", in J. Pombo, (Editor), "Proceedings of the Seventh International Conference on Railway Technology: Research, Development and Maintenance ", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 15, Paper 5.3, 2026, doi:10.4203/ccc.15.5.3 Keywords: high-speed maglev train, compression wave, micro-pressure wave, resonator, numerical simulation, moving model rig. Abstract The high-speed maglev train can operate at speeds exceeding 600 km/h, generating intense micro-pressure waves at tunnel exits when passing through tunnels. To mitigate this issue, a tunnel-installed resonant cavity structure is proposed in this study. Numerical simulations are performed to analyze its aerodynamic mitigation characteristics, and both numerical comparisons and moving model tests are adopted to verify the mitigation effect on micro-pressure waves. The results demonstrate that the resonant cavity can dissipate compression wave energy and reduce the pressure gradient, thus significantly weakening the micro-pressure wave at the tunnel portal. The mitigation efficiencies at 20 m and 50 m from the tunnel exit reach 41.87% and 40.15%, respectively. Moving model tests further validate the accuracy of the optimal scheme determined by numerical simulation. download the full-text of this paper (PDF, 11 pages, 802 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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