For the abnormal ice condition in 2009-2010 winter, sea ice samples were collected in a tide ditch outside a port in the east coast of Liaodong Bay, and ice specimens were prepared. Experimental study was carried out ...For the abnormal ice condition in 2009-2010 winter, sea ice samples were collected in a tide ditch outside a port in the east coast of Liaodong Bay, and ice specimens were prepared. Experimental study was carried out with a temperature-control precision of 0.1℃, and 117 columnar-grained ice specimens were loaded along the direction parallel to ice surface under different test temperatures （-4, -7, -10, -13, -16℃） and strain rates ranging from 10^-6 to 10^-2 s^-1 within which the ductile region, duetile-brittle transition and brittle region are contained. The uniaxial compressive strengths, density and salinity of the ice specmens were measured. The results support the curved-surface relationship between the uniaxial compressive strength and porosity within a wide range of strain rate. The curved-surface relationship gives a quantitative description about the variations of the mechanical behavior transition point with ice porosity, and supplies a uniform mathematical representation of uniaxial compressive strength under different failure modes. Besides, it is deduced that abnormal ice condition in 2009-2010 winter will not result in a change of the uniaxial compressive strength of sea ice in Bohai Sea.展开更多
Numerical modelling technique for ice flowing and melting field in coastal tidal currents for cooling water engineering design and research was presented based on k-Ε turbulence mathematical model and discretized mov...Numerical modelling technique for ice flowing and melting field in coastal tidal currents for cooling water engineering design and research was presented based on k-Ε turbulence mathematical model and discretized moving-boundary-fitting coordinate system. To treat the complicated geometric, topographic and hydraulic conditions in a natural estuarine water were given. Numerical results show that model is practical and efficient to cooling water engineering research. An engineering application has been conducted by using the prediction on ice reduction and melting process by heated water discharges.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.50921001,50879008)State Key Laboratory of Fro-zen Soil Engineering(Grant No.SKLFSE200904)+1 种基金Vilho,Yrj and Kalle Visl Fund of the Finnish Academy of Sciences and Lettersthe Norwegian Research Council Project AMORA(Grant No.193592/S30)
文摘For the abnormal ice condition in 2009-2010 winter, sea ice samples were collected in a tide ditch outside a port in the east coast of Liaodong Bay, and ice specimens were prepared. Experimental study was carried out with a temperature-control precision of 0.1℃, and 117 columnar-grained ice specimens were loaded along the direction parallel to ice surface under different test temperatures （-4, -7, -10, -13, -16℃） and strain rates ranging from 10^-6 to 10^-2 s^-1 within which the ductile region, duetile-brittle transition and brittle region are contained. The uniaxial compressive strengths, density and salinity of the ice specmens were measured. The results support the curved-surface relationship between the uniaxial compressive strength and porosity within a wide range of strain rate. The curved-surface relationship gives a quantitative description about the variations of the mechanical behavior transition point with ice porosity, and supplies a uniform mathematical representation of uniaxial compressive strength under different failure modes. Besides, it is deduced that abnormal ice condition in 2009-2010 winter will not result in a change of the uniaxial compressive strength of sea ice in Bohai Sea.
文摘Numerical modelling technique for ice flowing and melting field in coastal tidal currents for cooling water engineering design and research was presented based on k-Ε turbulence mathematical model and discretized moving-boundary-fitting coordinate system. To treat the complicated geometric, topographic and hydraulic conditions in a natural estuarine water were given. Numerical results show that model is practical and efficient to cooling water engineering research. An engineering application has been conducted by using the prediction on ice reduction and melting process by heated water discharges.
