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| Study on dynamic response calculation method of special cylindrical shells structure under internal blast load |
| GAO Kang-hua1,2，WANG Ming-yang1，LI Jie1 |
1.State Key Laboratory for Explosion & Impact and Disaster Prevention & Mitigation, PLA University of Science & Technology, Nanjing 210007,China；
2. 92656 Navy Troops，Sanya 572000，China |
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Abstract Based on classical elastic thin shell theory, the structure modal shape were expressed by beam modal function with the same boundary, and the dynamic response calculation methods of cylindrical shell with spherical dome under internal blast load were proposed. The simplified calculation method for dynamic response was obtained by analyzing the influence of slenderness ratio on cylindrical shell vibration. Though calculation examples, the calculated results of the presented method were compared with those of the existing methods. The rationality of the proposed method was validated, and the influences of dome on structure vibration were analyzed. The conclusions are as follows, by using the calculation model of cylindrical shell with equivalent concentrated mass of spherical dome, the computing error of shell radial displacement on higher order modes, which caused by elastic hinge stiffness coefficient obtained under cylindrical shell internal static pressure, can be reduced effectively. The calculation results of cylindrical shell vibration frequency and roof radial displacement are smaller than those of existing method. The influences of spherical dome on the cylindrical shell vibration decrease with the increase of the slenderness ratio of structure.
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Received: 23 March 2014
Published: 25 May 2015
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