Influence of Open Channel on Explosion-Induced Vibration Wave Propagation

Abstract:

Hazard control of explosion-induced vibration is an important issue which cannot be ignored in blasting engineering. Its influence range and damage scale are affected by the shock wave energy. This study applied the LS-DYNA software and adopted the Arbitrary Lagrangian-Eulerian method for numerical analysis to simulate the propagation of blast waves caused by the surface blast of C-4 explosives in a semi-infinite space in order to explore the effectiveness of Open Channel Grooves in vibration isolation. The analysis shows that the finite element method can properly simulate the dynamic characteristics of soil in an explosion; with the distance moving away from the explosion point, the shock wave gradually decays. Open Channel Grooves have a significant effect on attenuating the propagation of detonation waves. The attenuation degree is related to the width and depth of the groove, and the impact of the depth is greater than that of the width. This study can be used as a reference in hazard control of explosion-induced vibration for relevant engineering projects.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 1358-1362
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.1358
• Online since: January 2013
• Authors: Iau Teh Wang, Chin Yu Lee
• Keywords: Arbitrary Lagrangian-Eulerian, Explosion, Open Channel

References

[1] Z.Q. Wang, H. Hao and Y. Lu, A three-phase soil model for simulating stress wave propagation due to blast loading, International Journal for Numerical and Analytical Methods in Geomechanics. 28 (2004) 33-56.

DOI: 10.1002/nag.325

[2] Z.Q. Wang., Y. Lu, Numerical analysis on dynamic deformation mechanism of soils under blast loading, Soil Dynamics and Earthquake Engineering. 23 (2003) 705-714.

DOI: 10.1016/s0267-7261(03)00076-9

[3] S. Spyros., R. Fotis, Computer simulation of shock waves transmission in obstructed, Journal of Loss Prevention in the Process Industries. 17 (2004) 407-417.

DOI: 10.1016/j.jlp.2004.07.005

[4] Q. Zhang, C.H. Bia and Q.M. Liu, Experimental research on amplitude change of blasting seismic wave with topography, Journal of Beijing Institute of Technology. 9 (2000) 237-242.

[5] Technical manual (TM 5-855-1), Fundamentals of protective design for conventional weapons, Headquarters, Department of the Army, Washington DC, 1986.

[6] D.J. Benson, Computational Methods In Lagrangian and Eulerian Hydrocodes, Dept. of AMES R-011 University of California, San Diego La Jolla, CA 92093, 1990.

DOI: 10.21926/obm.genet.2201147

[7] LS-DYNA Version 971 User's Manual, Livermore Software Technology Corporation, 2007.

[8] W.F. Chen, Nonlinear analysis in soil mechanics: theory and implementation, Amsterdam, New York Elsevier, 1990.

[9] J. Wang, Simulation of Landmine Explosion Using LS-DYNA 3D Software, Benchmark Work of Simulation of Explosion in Soil and Air, DSTO Aeronautical and Maritime Research Laboratory DSTO-TR-1168, 2001.

[10] B.M. Dobratz, LLNL Explosive Handbook Properties of Chemical Explosives and Explosive Simulants, Lawrence Livemore National Laboratory, 1981.

DOI: 10.2172/6530310