Geometric Optimization of APCs anti Explosion Blades using LS-DYNA Finite Element Software
محورهای موضوعی : optimization and simulation
Jalil Jamali
1
(Islamic Azad University, Shoushtar Branch, Shoushtar, Iran)
alireza rezaie
2
(Islamic Azad University, Shoushtar Branch, Mechanical Engineering, M.S.student, Shoushtar, Iran)
کلید واژه: blast, Wave, APC LS-DYNA, Optimization, Explosion,
چکیده مقاله :
In this research, several different types of geometries have been compared to prevent the influence of an explosion wave on the glasses of the APCs. This was done using validation and then using LS-DYNA software. Pre and post-processing was done in LS-PrePost software. So, a mathematical function in this software was used to generate the pressure of the wave on the structure. In order to compare, the displacement parameter was used and the minimum total displacement of the structure as a criterion for optimal performance was considered. Also, two types of cosine curves, two types of polynomial curves (third and fourth order) and a flat blade are investigated. The results showed that for the use of a 150*100 mm2 square flat blade (which is half simulated according to the model's symmetry), the explosion of a wave coming from a distance of 75 mm on the adjacent sheet requires a sheet with a thickness of 11 mm. Using a curved blade, this thickness is reduced to 3 mm. According to the recent issue, the use of curved blades will lead to a sharp decrease in the weight of armored equipment.
[1] Jafari, A., Sadrnezhad, S. A., Daryan, A. S., and Bahrampour, H, The Study of Blast Effect on Reinforced Concrete Structures, Passive Defense Quarterly, Vol. 2, 2010
[2] Johnson, W., Poynton, A., Singh, H., and Travis, F. W., Experiments in the Underwater Explosive Stretch Forming of Clamped Circular Blanks, International Journal of Mechanical Sciences, Vol. 8, No. 4, pp. 237-270, 1996.
[3] Taylor, G. The Distortion Under Pressure of a Diaphragm Which is Clamped Along its Edge and Stressed Beyond the Elastic Limit, Underwater Explosion Research, Vol. 3, pp. 107-121, 1950.
[4] Nurick, G. N. J., Martin, B, Deformation of Thin Plates Subjected to Impulsive Loading—A Review Part II: Experimental Studies, International Journal of Impact Engineering, Vol. 8, No. 2, pp. 171-186, 1989.
[5] Kivity, Y., Florie, C., and Lenselink, H., Response of Protective Structures to Internal Explosions with Blast Venting, MSC World Users’ Conference, Alrlington, Virginia, May 1993.
[6] Jacob, N., Chung Kim Yuen, S., Nurick, G. N., Bonorchis, D., Desai, S. A., and Tait, D., Scaling Aspects of Quadrangular Plates Subjected to Localised Blast Loads—Experiments and Predictions, International Journal of Impact Engineering, Vol. 30, No. 8, pp. 1179-1208, 2004.
[7] Mittal, V., Chakraborty, T., Matsagar, V., Dynamic Analysis of Liquid Storage Tank Under Blast Using Coupled Euler–Lagrange Formulation, Thin-Walled Structures, Vol. 84, pp. 91-111, 2014.
[8] Monfared, A. R., Rahimi, Y., and Kiani, A., Concrete Tanks Response to Explosion Charges, NCCEA01, 2016.
[9] Aghakouchak, A., Khalilpour, S. H., Dehghani, G., Determination of Blast Pressure Distribution Around Cylindrical Shape Based on Numerical Simulation of Explosion, Modares Mechanical Engineering, Vol. 17, No. 2, pp. 19-28, 2017.
[10] Sahoo, D. K., Guha, A., Tewari, A., and Singh, R. K., Performance of Monolithic Plate and Layered Plates Under Blast Load, Procedia Engineering, Vol. 173, pp. 1909-1917, 2017.
[11] Bagheri, S., Tavangar Roosta, S., Saber, M. R., and Motamedalshariati, S. H., Simulation of the Blast Wall Geometry Effect on the Blast Wave Attenuation, Modares Mechanical Engineering, Vol. 17, No. 3, pp. 63-71, 2017.
[12] McDonald, B., Bornstein, H., Langdon, G. S., Curry, R., Daliri, A., and Orifici, A. C., Experimental Response of High Strength Steels to Localised Blast Loading, International Journal of Impact Engineering, Vol. 115, pp. 106-1, 2018.
