Investigation of shock/elastic obstacles interactions by means of a coupling technique |
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| Institution: | 1. School of Mechanical Engineering, Shandong University, Jinan 250061, China;2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Shandong University, Jinan 250061, China;1. Siberian State Industrial University, Kirov str. 42, 654007 Novokuznetsk, Russia;2. National University of Science and Technology “MISIS”, Leninskiy av. 4, 119049 Moscow, Russia;3. Institute of Strength Physics and Materials Science SB RAS, Akademicheskiy str. 2/4, 634021 Tomsk, Russia;1. Department of Urology, Asklepieion General Hospital, Athens, Greece;2. Department of Urology, University of Thessaly, Larissa, Greece;1. School of Civil Engineering & International Institute for Urban Systems Engineering, Southeast University, Nanjing 210096, P.R. China;2. Department of Mechanical Engineering, Graduate School & Faculty of Engineering, Chiba University, Chiba 263-8522, Japan;3. System Consulting Dept. Aimnext Inc., Minato-Ku, Tokyo 105-0013, Japan |
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| Abstract: | Arrays of obstacles have proved to be an efficient way of attenuating shock waves generated by large scale explosions. The present study intends to take into account fluid–structure interactions that may occur when elastic obstacles are used. A tractable coupling tool based on a partitioned procedure is exposed, validated on the supersonic flutter of a panel and applied to a configuration composed of square section cylinders. Several numerical difficulties related to staggering are emphasized and workarounds discussed. A methodical procedure involving one and two-way coupled simulations highlights the influence of material properties as well as the acceleration of waves in the fluid when an initial motion is prescribed to the obstacles. Finally, it is shown that uncoupled simulations may be relevant to investigate shock mitigation in some given cases. |
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| Keywords: | Fluid–structure interaction Partitioned procedure Wave propagation Aeroelasticity Shock mitigation |
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