【摘 要】
：
Explosion and impact are nonlinear problems where a variety of media, such as gas, solid and liquid, strongly interact under high speed, high temperature and high pressure conditions, formidable chall
【机 构】
：
State Key Laboratory of Explosion Science and Technology,Beijing Insititute of Technology,Beijing 10
【出 处】
：
爆炸科学与技术国家重点实验室2011年学术年会暨International Workshop on Intensive
论文部分内容阅读
Explosion and impact are nonlinear problems where a variety of media, such as gas, solid and liquid, strongly interact under high speed, high temperature and high pressure conditions, formidable challenge is imposed on the theoretical and experimental research.Due to such advantages as security, confidentiality, design flexibility, environment and process controllability and high cost-effective ratio, numerical simulation becomes the main approach to investigate such problems.This paper introduces in detail high resolution computations of explosion and impact problems, high order numerical boundary condition, positivity preserving and multi-medium interface treatment by the authors in recent years.Based on real ghost fluid method (RGFM) (Wang et al.[1]) method and Level Set method (Osher and Fedkiw [2]), the computational method that can address high density and high pressure ratio is proposed.High order finite difference weighted essentially non-oscillatory (WENO) method (Jiang and Shu [3]) are generalized to solve the explosion problems with chemical reaction source terms.Based on this, a high precision parallel computation code was developed for explosion and impact problems.The code can simulate problems such as gas detonation (Wang et al.[4]), initiation of condensed-phase explosives (Wang et al.[5]), detonation diffraction, shock wave interaction with bubbles, underwater explosion.By constructing artificial solutions and comparison with experimental results, the accuracy and computation results of the computation method are validated and verified.
其他文献
In virtue of operating improperly, many exigent accidents of chemical industries are emerged frequently.1, l-Di-(tert-butylperoxy)-3,3,5-trimethylcyclohexane (TMCH), 1,1-di (tert-butylperoxy) cyclohex
In recent years, with the development of hypervelocity platform and the enhancement of the defending system, it has a strong demand for the investigation of the hypervelocity penetration of concrete t
Controlling wave propagation with spatial material distribution has important applications such as stealth technology, structure impact protection and super-resolution imaging.In recent years, based o
In analysis of the mechanism of projectile penetrating to plate, the one dimensional engineering calculation can be provided with the characters of clearer physical implication, faster processing and
Cellular metals with periodic and non-periodic microstructures can sustain large plastic deformation at almost constant stress.Due to such excellent energy absorption capability, cellular metals are v
This presentation will discuss the characterisation of mechanical properties of cellular solids.Various mechanical property parameters and their experimental determinations will be introduced.A method
Bulk metallic glasses (BMGs), due to the lack of long-range order and the absence of traditional defects such as dislocation and grain boundary, have a series of intriguing mechanical, physical and ch
The axial dynamic buckling responses of pseudo-elastic NiTi alloy cylindrical shells were investigated experimentally for various length/diameter ratios and end constraint conditions by using a modifi
The in-depth study for how the welding interface forms has great significance for the practice of welding engineering.The experiments, numerical simulations and analyses from the macro perspective hav
The static and dynamic crushing behaviour of sandwich tubes between two rigid plates was investigated experimentally and numerically in the paper.The dynamic strength and energy absorption of sandwich