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Applications of online monitoring technology for tailings dam on digital mine

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中国有色金属学会会刊：英文版 2011年第S3期21卷 604-609页

作者： YU Guang-ming1, SONG Chuan-wang1, ZOU Jing-bo1, WU Yan-xia1, PAN Yong-zhan1, LI Liang1, LI Ran1, WANG Pei-shou2. WANG Yan-lei2.1. school of civil {2., qingdao technological university, qingdao 2.6033, China 2. Hedong Goldmine, Zhaojin Mining Industry Company, Zhaoyuan 2.5400, China [a] school of civil {2. Qingdao Technological University Qingdao 266033 China [b] Hedong Goldmine Zhaojin Mining Industry Company Zhaoyuan 265400 China

Considering its structural features, geometric shapes, service mode, environmental media, mechanical behavior, etc, the special nature and complexity of tailings dam were summarized. The technical approach to safety management for tailings dam was proposed, which is the on-line automated monitoring and early warning information. The results show that a strong theoretical basis can be provided for security monitoring and security management of tailings dam. Online automated monitoring system for tailings dam has full implementation of the information. It is applied widely in Lingnan gold mine, Xiadian gold mine and Hedong gold mine in Zhaoyuan, Shandong Province, and achieves good effect.

关键词： digital mine tailings dam online monitoring security monitoring digitization

Service Life Prediction of Lining Concrete of Subsea Tunnel under Combined Compressive Load and Carbonation

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Journal of Wuhan university of Technology(Materials Science) 2010年第6期25卷 1061-1064页

作者：陈静茹 school of civil {2. Qingdao Technological University

qingdao Jiaozhou Bay subsea tunnel is the second self-built tunnel in China with the designed service life over 100 *** durability of lining concrete are one of an important factors to determinate the service life of *** the main environmental loads and mechanical loads of subsea tunnel,the durability properties of lining concrete under combined action of compressive load and carbonation has been studied through the critical compressive load test,accelerated carbonation test,natural carbonation test and capillary suction *** tests results show that critical compressive load apparently accelerates the carbonation and deteriorates the anti-permeability of *** the combined action of critical compressive load and carbonation,the durability of lining concrete *** on the carbonization life criteria and research results,for the high-performance concrete with proposed mix ratio,the predicted service life of lining concrete for Jiaozhou bay subsea tunnel is about 80 years which fails to reach the required service *** is necessary to adopt other measurements simultaneously to improve the durability of lining concrete.

关键词： Jiaozhou Bay subsea tunnel service life lining concrete durability carbonation property critical compressive load

INTERNAL FLOW MECHANISM AND EXPERIMENTAL RESEARCH OF LOW PRESSURE AXIAL FAN WITH FORWARD-SKEWED BLADES

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Journal of Hydrodynamics 2008年第3期20卷 299-305页

作者： LI Yang LIU Jie OUYANG Hua DU Zhao-Hui College of Electromechanical engineering Qingdao University of Science and Technology Qingdao 266061China school of Environmental and Municipal engineering Qingdao Technological University Qingdao 266033 China school of Mechanical engineering Shanghai Jiaotong University Shanghai 200030 China

This article presents the flow mechanism analysis and experimental study of a forward-skewed impeller and a radial impeller in low pressure axial fan. The forward-skewed blade was obtained by the optimization design of the radial blade and CFD technique. Measurement of the two blades was carried out in aerodynamic and aeroacoustic performance. Compared to the radial blade, the forward-skewed blade has demonstrated the improvements in efficiency, total pressure ratio, Stable Operating Range （SOR） and less aerodynamic noise. Detailed flow measurement and computation were performed for outlet flow field for investigating the responsible flow mechanisms. The results show the forward-skewed blade can cause a spanwise redistribution of flow toward the blade mid-span and reduce tip loading. This results in reduced significantly total pressure loss near hub and shroud endwall region, despite the slight increase of total pressure loss at mid-span.

关键词： low pressure axial fan forward-skewed blade aerodynamic performance flow mechanism

A geometrical and physical nonlinear finite element model for spatial thin-walled beams with arbitrary section

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Science China(technological Sciences) 2010年第3期53卷 829-838页

作者： YANG QingShan 1 &WANG XiaoFeng 2.1 school of civil {2.,Beijing Jiaotong university,Beijing 100044,China 2.College of civil {2.,Tongji university,Shanghai 2.0092.China 1. school of civil {2. Beijing Jiaotong University Beijing 100044 China2. College of Civil Engineering Tongji University Shanghai 200092 China

Based on the theories of Bernoulli-Euler beams and Vlasov's thin-walled members,a new geometrical and physical nonlinear beam element model is developed by applying an interior node in the element and independent interpolations on bending angles and warp,in which factors such as traverse shear deformation,torsional shear deformation and their coupling,coupling of flexure and torsion,and second shear stress are all ***,geometrical nonlinear strain in total Lagarange(TL) and the corresponding stiffness matrix are *** plastic model is applied to physical nonlinearity to comply with the yield rule of Von Mises and incremental relationship of *** stiffness matrix is derived by numerical integration on the basis of the finite segment *** show that the developed model is feasible in analysis of thin-walled structures with high accuracy.

关键词： Spatial beams thin-walled structures geometrical and physical nonlinearity finite element arbitrary section

Self-assembly structure formation on patterned InP surfaces

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Science China(technological Sciences) 2009年第9期52卷 2732-2736页

作者： SU Ge1,2.CAO LiXin1 & LIU TianZhong3 1 Institute of Material Science and engineering,Ocean university of China,{2. 2.6100,China 2.Nanoscale Physics Research Laboratory,school of Physics and Astronomy,the university of Birmingham,Edgbaston,Birmingham B15 2.T,UK 3 College of Food Science and engineering,Ocean university of China,{2. 2.6003,China Institute of Material Science and engineering Ocean University of China Qingdao 266100 China Nanoscale Physics Research Laboratory School of Physics and Astronomy the University of Birmingham Edgbaston Birmingham B15 2TT UK College of Food Science and engineering Ocean University of China Qingdao 266003 China

Self-assembly of polystyrene spheres guided by patterned n-type InP substrates has been investigated. InP surfaces were patterned using a variety of methods including wet chemical etching,sputter coating,thermal evaporation,and photo lithography. The self-assembly of polystyrene spheres depended on the appearance of patterns and was affected by the deposition techniques (sputter coating and thermal evaporation) of Au micro-squares. SEM and AFM were used to characterize the surface morphologies.

关键词： self-assembly polystyrene spheres pattern InP surface

The 3-D non-axisymmetrical Lamb's problem in transversely isotropic saturated poroelastic media

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Science China(technological Sciences) 2004年第5期47卷 526-549页

作者： HUANG Yi1 & WANG Xiaogang1,2.1. school of civil {2., Xian university of Architecture & Technology, Xian 710055, China 2. Department of civil {2., Qinghai university, Xining 810016, China Correspondence should be addressed to Huang Yi (email: huangyih@***) Received April 15, 2.04 revised July 12. 2.04 1. school of civil {2. Xi’an University of Architecture & Technology 710055 Xi’an China 2. Department of civil engineering Qinghai University 810016 Xining China

Based on Biots theory on fluid-saturated porous media, the displacement functions are adopted to convert the 3-D Biots wave equations in the cylindrical coordinate for transversely isotropic saturated poroelastic media into two棗one 6-order and one 2.order棗uncoupling differential governing equations. Then, the differential equations are solved by the Fourier expanding and Hankel integral transform method. Integral solutions of soil skeleton displacements and pore pressure as well as the total stresses for poroelastic media are obtained. Furthermore, the systematic study on Lambs problems for the transversely isotropic saturated poroelastic media is performed. Integral solutions for surface radial, vertical and circumferential displacements are obtained in both cases of drained surface and undrained surface under the vertical and horizontal harmonic excitation force. In the end of this paper, the numerical examples are presented. The calculation results indicate that the difference between the model of isotropic saturated poroelastic media and that of transversely isotropic saturated poroelastic media is obvious.

关键词： transversely isotropic saturated poroelastic media, Biot's wave equations, Lamb's problems.

Dynamic subsidence prediction of ground surface above salt cavern gas storage considering the creep of rock salt

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Science China(technological Sciences) 2010年第12期53卷 3197-3202页

作者： WANG TongTao1, YAN XiangZhen1, YANG XiuJuan1 & YANG HengLin2.1 College of Pipeline and civil engineering, China {2. of Petroleum, qingdao 2.6555, China 2.CNPC Drilling Research Institute, Beijing 100097, China 1. College of Pipeline and civil engineering China University of Petroleum Qingdao 266555 China2. CNPC Drilling Research Institute Beijing 100097 China

A new model is proposed to predict the dynamic subsidence of ground surface above salt cavern gas storage during the leaching and storage, which takes into account the creep of rock salt. In the model, the extended form of Gaussian curve is adopted to figure out the shape of subsidence areas. The corresponding theoretical formulas are derived. In addition, parameters are studied to investigate the surface subsidence as a function of the salt ejection rate, internal pressure, buried depth, diameter, height, running time, etc. Through an example, the subsidence of the salt cavern gas storage located at Jiangsu of China obtained by the new model was compared with those by Peter A F formula, Schober & Sroka formula and FLAC3D through simulation. The results showed the proposed model is precise and correct, and can meet the actual engineering demands. The surface subsidence is equidirectional with the increase of salt ejection rate, depth, diameter, height, and running time, but reverse to the increase of internal pressure. The depth, diameter, running time and internal pressure have great effects on the subsidence, whereas the salt ejection rate and height have little influences on it.

关键词： salt cavern gas storage dynamic subsidence creep of rock salt extended form of Gaussian curve calculation model

An adaptive scaled boundary finite element method by subdividing subdomains for elastodynamic problems

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Science China(technological Sciences) 2011年第S1期54卷 101-110页

作者： ZHANG ZiHua 1,2.YANG ZhenJun 2.LIU GuoHua 1 & HU YunJin 1 1 College of civil engineering and Architecture,Zhejiang {2.,Hangzhou 310058,China 2.school of engineering,{2. of Liverpool,L69 3GQ,UK 1. College of civil engineering and Architecture Zhejiang University Hangzhou 310058 China 2. school of engineering University of Liverpool Liverpool L69 3GQ UK

The scaled boundary finite element method(SBFEM) is a semi-analytical numerical method,which models an analysis domain by a small number of large-sized subdomains and discretises subdomain boundaries *** a subdomain,all fields of state variables including displacement,stress,velocity and acceleration are semi-analytical,and the kinetic energy,strain energy and energy error are all integrated *** advantages are taken in this study to develop a posteriori h-hierarchical adaptive SBFEM for transient elastodynamic problems using a mesh refinement procedure which subdivides *** only a small number of subdomains are subdivided,mesh refinement is very simple and efficient,and mesh mapping to transfer state variables from an old mesh to a new one is also very simple but *** 2. examples with stress wave propagation were *** results show that the developed method is capable of capturing propagation of steep stress regions and calculating accurate dynamic responses,using only a fraction of degrees of freedom required by adaptive finite element method.

关键词： scaled boundary finite element method subdivision of subdomains h-hierarchical adaptivity mesh mapping transient elastodynamics

Effect of the silicon powder content on the properties of Al_2._3-SiC-Me composites

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Science China(technological Sciences) 2009年第1期52卷 193-197页

作者： ZHANG ZhiHui1, RUAN GuoZhi1 & CHEN YunBo1,2.1 school of Material Science and engineering, Shandong {2. of Science and Technology, qingdao 2.6510, China 2.Institute of Material engineering, China Academy of Machinery Science and Technology, Beijing 100083, China school of Material Science and engineering Shandong University of Science and Technology Qingdao 266510 China Institute of Material engineering China Academy of Machinery Science and Technology Beijing 100083 China

By means of transient plastic phase process, the Al2.3-SiC-Me composites were produced throungh adding metal aluminium and silicon-powder to Al2.3-SiC materials. Under the condition of the same content of silicon and aluminium mixed-powder, the effect of silicon powder addition on properties of Al2.3-SiC-Me composites was studied by means of XRD and EPMA analyses in the temperature range of 300℃―1600℃. The results indicated that the content of metal phase in the sample at 1600℃ increases with increasing silicon powder content. At the same time, when the temperature is lower than 1100℃, the strength of samples gradually increases with increasing temperature. However when the temperature is higher than 1100℃, the strength of samples gradually decreases with increasing temperature, and this change is very small. The results also indicated that at the same sintering temperature, the sample with 6% silicon powder has the maximum strength.

关键词： composites strength ceramic