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STUDY ON SUB-DRY CUTTING GCr12

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Chinese Journal of Mechanical engineering 2002年第1期15卷 40-42页

作者： Ren Jialong Department of Mechanical engineering，East china shipbuilding institute， Zhengjiang 212003，china Department of Mechanical engineering East China Shipbuilding Institute Zhengjiang 212003 China

through the comparison study on cutting force, cutting temperature andmachined surface quality with the sub-dry cutting traditional cooling method, it is shown thatsub-dry cutting can retard the wear of the tooled par... 详细信息

关键词： Sub-dry cutting Production without pollution Bearing steal

Analysis　of　Entropy　Generation　of　Combined　Heat　and　Mass　Transfer　in　Internal　and　External　Flows　with　the　Assumption　of　Local　thermodynamic　Equilibrium

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Journal of thermal Science 1994年第1期3卷 1-6页

作者： Shouguang Yao(Department of Power engineering, East china shipbuilding institute, Jiangsu Zhenjiang, 212003,china) Department of Power engineering East China Shipbuilding Institute Jiangsu China

In this paper, the control volume method is used to establish the general expression of entropy generation due to combined convective heat and mass transfer in internal and external fluid streams. theexpression accounts for irreversibilities due to the presence of heat transfer across a finite temperaturedifference, mass transfer across a finite difference in the chemical potential of a species, and due toflow friction. Based on the assumption of local thermodynamic equilibrium, the generalized form ofthe Gibbs equation is used in this analysis. the results are applied to two fundamental problems offorced convection heat and mass transfer in internal and external flows. After minimizing the entropygeneration, useful conclusions are derived that are typical of the second law viewpoint for the definitionof the optimum operation conditions for the specified applications, which is a' valuable criterion foroptimum design of heat and fluid flow devices.

关键词： entropy generation local thermodynamic equilibrium heat and mass transfer

An Analysis on Application and Trend of Low-Alloy Steel in shipbuilding and Offshore engineering Industry

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Journal of Iron and Steel research International 2011年第S1期18卷 827-830页

作者： LI Xin-xin,NA Rong-qing,MENG Zhao-chuang (Dalian shipbuilding Industry engineering and research institute,Dalian 116000,Liaoning,china) Dalian Shipbldg Ind Engn & Res Inst Dalian 116000 Liaoning Peoples R China

Since 2003,china shipbuilding industry has stepped into the orbit of fast *** this paper,a brief analysis has been made on application of low-alloy steel in the shipbuilding and offshore engineering industry,and the further requirements on the marine steel plates elaborated in combination with the future development trend in this ***,a reference approach is proposed for potential cooperation between the shipbuilding industry and steel industry.

关键词： low-alloy steel ship and offshore engineering

A Network-Based VPN Architecture Using Virtual Routing

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A Network-Based VPN Architecture Using Virtual Routing

CORROSION FATIGUE CRACK GROWth OF MEDIUM STRENGth STEEL HT60 IN SYNthETIC SEA WATER

the 1st Chinese Conference on Trusted Computing and Information Security

作者： ZHANG Baoliang. HU Han-ping. WU Xiaogang, KONG Tao State Education Ministry Key Laboratory of Image Information and Intelligent Control, wuhan 430074, hubei, china institute of Pattem Recognition and Artificial Intelligonce, Huazhong University of Science and Technology, wuhan 430074, hubei, china 709th research institute of china shipbuilding engineering society, wuhan 430074, hubei, china

＜正＞ A network-based Virtual Private Network （VPN） architecture by using fundamental routing mechanism is proposed. this network is a virtual overlay network based on the relay of IP-in-IP tunneling of virtual routing modules. the packet format employs the encapsulation of IPSec ESP （Encapsulating Security Payload）, an impact path code and an extended DS （ Differentiated Services） code to support multi-path routing and QoS. Comparing with other models of VPN, this network system can be deployed in the current network with little investment, and it is easy to implement. the simulation result shows its performance is better than the traditional VPN system of black box mode.

关键词： virtual routing network-based VPN proactivedefense

来源： cnki会议评论

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Acta Metallurgica Sinica(English Letters) 1992年第7期5卷 48-52页

作者： GAO Hongbin, Harbin shipbuilding engineering institute Harbin, china GAO Hongbin, Associate Professor, Harbin shipbuilding engineering institute, Harbin 150001, china

the corrosion fatigue crack growth and near-threshold characteristics of a medium strength steel HT60 were investigated using compact tension specimens exposed to synthetic sea water. the da/dN-△AK_(eff) relation in air can give a conservative estimation of da/dN-△K relations in sea water. In the case of high R, however, crack growth acceleration at high △K regions appears to be cantrolled by the stress-assisted dissolution. the crack opening stress inlensity factor K_(op) detected by the back-face-strain method is the result of crack surface in contact with the corrosion products and therefore an overestimated value of K_(op) at the crack tip is given.

关键词： corrosion fatigue crack growth crack closure synthetic seawater

PLANE STRESS DYNAMIC FIELDS NEAR A PROPAGATING CRACK-TIP IN A POWER-LAW MATERIAL

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Acta Mechanica Sinica 1988年第1期4卷 22-34页

作者： Zhang Zimao Gao Yuchen Harbin shipbuilding engineering institute, Harbin. china Now at Department of Mechanics, Harbin institute of Technology, Harbin, china. Harbin shipbuilding engineering institute Harbon China

Based on the plastic-dynamic equations, the asymptotic behaviour of the near-tip fieldsfor a plane stress tensile crack propagating in a power-law material has been studied in this paper, It isshown that the stress and strain singularities are, respectively, of the order (In A/r)~(1/(n-1)) and(In A/r)~(n/(n-1)).where A is a constant which is related to the size of plastic region, r is the distance to the crack tip, n isthe power-law exponent.

关键词： power-law material strain singularity singularity-factor elastic region plasticregion.

DAMAGE thEORY OF MATERIALS WIth MICROSTRUCTURE

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Acta Mechanica Sinica 1989年第2期5卷 136-144页

作者： Gao Yuchen (Harbin shipbuilding engineering institute) Harbin shipbuilding engineering institute Harbin China

A new form of damage theory of materials is proposed,that is valid for the case of nonconservative *** partial entropy,strain and microstructure parameters are taken as the state *** assuming the free energy to be a state function,the basic governing equations are *** to the balance of released and dissipated energy,the general form of damage evolution equation is ***,assuming the existence of independent damage mechanisms, the normality of damage evolution equation is *** generalized damage variables are dis- ***,some examples are given to show the applications of the theory.

关键词： state functions constrained variables damage evolution

UNSTEADY WAVES DUE TO AN IMPULSIVE OSEENLET BENEAth thE CAPILLARY SURFACE OF A VISCOUS FLUID

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Journal of Hydrodynamics 2008年第1期20卷 23-29页

作者： LU Dong-qiang CHEN Xiao-bo Shanghai institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China Shanghai Key Laboratory of Mechanics in Energy and Environment engineering Shanghai 200072 China research Department Bureau Veritas Tour Manhattan 5-6 P1 de l＇Iris 92077 Paris La Defense FranceCollege of Shipbuilding Engineering Harbin Engineering University Harbin 150001 China

the two-dimensional free-surface waves due to a point force steadily moving beneath the capillary surface of an incompressible viscous fluid of infinite depth were analytically investigated. the unsteady Oseen equations were taken as the governing equations for the viscous flows. the kinematic and dynamic conditions including the combined effects of surface tension and viscosity were linearized for small-amplitude waves on the free-surface. the point force is modeled as an impulsive Oseenlet. the complex dispersion relation for the capillary-gravity waves shows that the wave patterns are characterized by the Weber number and the Reynolds number. the asymptotic expansions for the wave profiles were explicitly derived by means of Lighthill’s theorem for the Fourier transform of a function with a finite number of singularities. Furthermore, it is found that the unsteady wave system consists of four families, that is, the steady-state gravity wave, the steady-state capillary wave, the transient gravity wave, and the transient capillary wave. the effect of viscosity on the capillary-gravity was analytically expressed.

关键词： Oseen flow fundamental singularity asymptotic solution Weber number Reynolds number

Ti(C, N) BASED CERAMETS AND ITS FRACTAL ANALYSIS OF FRACTURE SURFACES

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中国有色金属学会会刊：英文版 1996年第2期6卷 101-104页

作者： Liu Ning(Department of Materials Science and engineering,Anhui institute of Technology, Hefei 230069)Hu Zhenhua Cui Kun(Huazhong University of Science and Technology, wuhan 430074) Department of Materials Science and engineering Anhui Institute of Technology Hefei 230069 China Huazhong University of Science and Technology Wuhan 430074 China

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关键词： Ti(C, N) based ceramets fracture surface fractal analysis