防爆門受衝擊荷載之數值分析

陳宗湧

doi:10.6342/NTU.2008.01736

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防爆門受衝擊荷載之數值分析

Numerical Analysis of Blastdoor Under Impact Loading

陳宗湧 , Masters　　Advisor：翁宗賢　　

繁體中文 DOI： 10.6342/NTU.2008.01736

防爆門；衝擊摹擬； blast door ； impact simulation ； LS-DYNA ； ANSYS

Abstract │ Reference (21) │ Times Cited (6) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

The blast door is a multi-layer structure capable of impact resistance, fire resistance, and bullet resistance. It has been widely applied in national defense, high technology industry, life safety, and so on. The specially designed blast door which can stand 10 bar explosion pressure shock, as a result of 51 lb (23kg) TNT exploding at a distance of 6m, was investigated numerically in this thesis.
    This research adapted the software Pro/E to build up the geometry model of the blast door and exported the model frame to the simulation software ANSYS/LS- DYNA for the setup of element mesh and material properties. Then the boundary condition parameters were set by following the U.S. Army Technical Manual TM5- 1300. Finally, the results were obtained by executing the LS-DYNA solver. By such steps mentioned above one can explore the transient response and the destruction mode of the blast door subjected to the blast pressure shock.
The grid independency was also checked to confirm the reliability of the numerical results in prior. The simulation results dictates that there is no fatal destruction in the whole assembly of the blast door under the attack of 10 bar explosion pressure shock.
    The numerical works show that the anti-blast plate will not be torn from the hinges and latch. However, the central frame of the blast door displays obviously deformation and exceeds the ultimate strength of the material. As the square member of central frame of the blast door replaced by I-beam of the same cross-sectional area, the stress and deformation of the blast door are both improved. The outer rib of the blast door could be appropriately strengthened by increasing the thickness of the iron plate coated with zinc. But the improvement will be degraded as the thickness of the plate reaches some values. There is a trade off between the strength of pressure shock resistance and cost of the blast door. Anyhow, dynamic simulation provides a valuable tool to explore the performance of a blast door under shock impact at a very low cost.

Reference ( 21 ) 〈TOP〉

3. ANSYS LS-DYNA 基礎訓練課程講義，虎門科技股份有限公司，2008。
連結：
4. Jones, N., Uran, T. and Tekin, S. A., “The Dynamic Plastic Behaviour of Rectangular Plates,” International Journal of Solids Structure, Vol. 6, pp. 1499- 1512, 1970.
連結：
5. Olson, M. D., Nurick, G. N. and Fagnan, J. R., “Deformation and Rupture of Blast Loaded Square Plates-Predictions and Experiments,” Int. J. Impact Enging, Vol. 13, pp. 279-291, 1993.
連結：
6. Nurick, G. N. and Shave, G. N., “The Deformation and Tearing Thin Square Plates Subjected to Impulsive Loads-an Experimental Study,” Int. J. Impact Enging, Vol. 19, pp. 99-116, 1996.
連結：
17. LS-DYNA 970 Keyword User manual, Livermore Software Technology Corporation, 2003.
連結：

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