力学进展

2013 Vol. 43, No. 3

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A pioneer in the frontier of engineering science——Zhe-Min Zheng

DAI Lanhong

2013, 43(3): 265-294. doi: 10.6052/1000-0992-13-033

Abstract(2856)

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Abstract:
Zhe-Min Zheng, as a famous mechanician, is the founder and pioneer of explosion mechanics in China. He won the State Preeminent Science and Technology Award of China in 2012. This paper reviews the abundant research activities of Zhe-Min Zheng over the past 60 years, especially his outstanding academic contributions in the areas of explosion processing, underground nuclear explosion, blasting push-out silt, armor penetration by shaped charge jet, coal and gas outburst, natural gas hydrate mining, hydro-elastic dynamics, material mechanical behavior, etc. These achievements are marked by distinct character of engineering science, that is, they are motivated from the national significant demands, and reached by refining the critical physical factors and innovative theories from complex issues, and providing useful guide to practice. The scientific contributions and academic thoughts of Zhe-Min Zheng have great practical significance and reference value for the development of mechanics.

Research advances in large eddy simulation of urban atmospheric environment

CUI Guixiangy, ZHANG Zhaoshun, XU Chunxiao, HUANG Weixi

2013, 43(3): 295-328. doi: 10.6052/1000-0992-13-016

Abstract(3319)

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Abstract:
In this paper, we review practices and progresses in the study of pollution dispersion in urban atmosphere. We introduce the inherent features of urban environmental flow, as well as the application of a modern computational fluid dynamic (CFD) method, namely, the large eddy simulation for the study of urban atmospheric environment. We describe the mathematical model, governing equations, subgrid scale model, well-posed initial-boundary conditions and numerical method. In this paper, we focus on a coupling scheme between meso- and micro-scale motions, and a combined underlying surface model for the complex urban canopy, which satisfies the resolution requirements with relatively lower computing load. Practical simulations are presented and analyzed, including the statistical estimation of reliability and the turbulent characteristics, etc. Finally, further improvements needed for numerical methods of urban environment simulations are pointed out, and a number of key scientific problems are raised for numerical studies on urban environmental flows and pollution dispersion.

Advances in impact tensile properties of 3-D textile structural composites

MA Pibo, JIANG Gaoming, GAO Zhe, XIA Dong

2013, 43(3): 329-357. doi: 10.6052/1000-0992-13-008

Abstract(2203)

PDF(7420)

Abstract:
Textile structural composite is kind of composite which the reinforcement is textile fabric (includes two-dimensional and three-dimensional) and the matrix is resin. Textile structural composites have been widely used in all areas; the composites often are used under impact loading in the practical application due to their low-cost and high quality structures such as high strength to weight ratio and high resistance to corrosion and abrasion. Research for the impact behaviors of textile structural composites can help the development and optimization design for textile structural composites. In this review, the development, styles, impact tension behaviors and the damage mechanisms of textile structural composites have been introduced. The future development of impact tension behaviors of textile structural composites are also introduced in this review.

2013 Vol. 43, No. 3

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