检索结果-内蒙古大学图书馆

Research on bearing capacity computation method of concrete beam reinforced with fiber reinforced plastics bars

Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology 2006年第9期28卷 64-67页

作者： Zhang, Peng Mo, Ce-Xian Li, Bing Department of Civil Engineering Guangxi University of Technology Liuzhou 545006 China

The bearing capacity computation method about fiber reinforced concrete and prestressed concrete beams was advised in the paper. The resistance of bending moment and shearing force was comprehensive considered in this theory, so the result was in conformity with stress and the theory was convenient for computer simulation. In the theory some parameters of FRP commonly ignored by criterions were entered in consideration. Finally the result of computing was made the contrast with the test result and the result of computing was in conformity with the test result.

关键词： Bearing capacity computation method Concrete beams Fiber reinforced plastics bars(FRP)

来源：评论

学校读者我要写书评

暂无评论

computation method of shaped-charge jet penetrating concrete targets

Computation method of shaped-charge jet penetrating concrete...

引用

International Symposium on Safety Science and Technology

作者： Li, HL Han, F Beijing Inst Technol Dept Mech & Engn Beijing 100081 Peoples R China

ISBN: (纸本)7030143868

Concrete is widely used in military and civil buildings with its special features, and many ground and underground works (for example, airdrome track, underground bunker, etc) are multi-layer concrete constructions. Using shaped-charge jet to penetrate multi-layer concrete targets is a common method, however, the thickness of each layer target is generally limited and the influence of targets boundary effect to the penetration must be thought of. Because it is very difficult to calculate penetrating depths and penetrating radius by common ways, a new engineering calculation method-Superimposition method is introduced In this paper and the rough calculation about penetration depths can be found by it, which provides some reference basis for solving some actual engineering problems.

关键词： computation method shaped-charge jet penetrating concrete targets

来源：评论

学校读者我要写书评

暂无评论

computation method of Shaped-charge Jet Penetrating Concrete Targets

Computation Method of Shaped-charge Jet Penetrating Concrete...

引用

2004安全科学与技术国际会议

作者： LI Hongliang & HAN Feng (Department of Mechanics and Engineering, Beijing Institute of Technology, Beijing 100081, China)

关键词： computation method shaped-charge jet penetrating concrete targets

来源：评论

学校读者我要写书评

暂无评论

Study on the analytic calculation method of throttle slice deformation

Study on the analytic calculation method of throttle slice d...

引用

IEEE International Conference on Mechatronics and Automation

作者： Zhou, Changcheng Kang, Baojiang Gu, Liang Shandong Univ Technol Sch Transport & Vehicle Engn Zibo Shandong Peoples R China

ISBN: (纸本)9781424408276

In this paper, the governing differential equation for deformation of a single throttle-slice is introduced first, and based on its solution satisfying required boundary conditions, the formula and coefficient for deformation of a single slice is obtained through equivalency transformation. The G, and it's physics meaning at different radius are studied, the deformation at any radius r is researched. At last, compared with other methods, such as machine design and ANSYS FEA software, The compared results show that G, method is the most precise computation method way of throttle-slice deformation, and has very important meaning to the throttle-slice design, analysis, and verification, at the same time, it provides an effective method for mathematics theory better used in practical application.

关键词： shock absorber throttle-slice deformatiom analytic calculation computation method

来源：评论

学校读者我要写书评

暂无评论

Fractal dimension computation methods for gas diffusion layer of PEM fuel cells

引用

Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) 2005年第6期29卷 895-898页

作者： Shi, Ying Lou, Xiaopeng Quan, Shuhai Xiao, Jinsheng School of Automation Wuhan University of Technology Wuhan 430063 China Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan 430070 China

A set of scanning electron microscope images of gas diffusion layer (GDL) in proton exchange membrane fuel cell (PEMFC) are gained, which have different magnifications. Five fractal dimension computation methods for digital images are studied to find a suitable method. It is found that the result from the simplest box-counting method is precise, the meaning of box-counting fractal dimension is clear and its calculation time is small. So the most suitable computation method of gas diffusion layer fractal dimension is box-counting method.

关键词： computation method Fractal dimension GDL PEMFC

来源：评论

学校读者我要写书评

暂无评论

An assessment of stress intensity factors for surface flaws in a tubular member

引用

ENGINEERING FRACTURE MECHANICS 2005年第3期72卷 357-371页

作者： Peng, D Wallbrink, C Jones, R Monash Univ Dept Engn Mech Clayton Vic 3800 Australia

In the safety assessment of pressure vessels and pipes with circumferential surface cracks, it is often necessary to consider fatigue crack propagation and fracture among the possible modes of failure. The stress intensity factors at crack tips are important parameters for estimating residual life and criticality. The purpose of this paper is to present a method to calculate the mode I stress intensities for semi-elliptical cracks in pipes. This method uses the finite element technique to analyse a crack but does not require the crack to be modelled explicitly. This method is ideal for use with either fatigue life calculations or use with structural optimisation processes. Accurate results are obtained using only a relatively small number of degrees of freedom without the need to explicitly mesh cracks. In this paper a range of examples are presented to demonstrate the accuracy of this method. (C) 2004 Elsevier Ltd. All rights reserved.

关键词： stress intensity factors circumferential surface cracks conformal transformation elbow pipe computation method

来源：评论

学校读者我要写书评

暂无评论

Improved method for calculating characteristic area and characteristic energy and its application

引用

Shiyou Daxue Xuebao/Journal of the University of Petroleum China 2004年第1期28卷 63-65页

作者： Qin, Xu-Da Liu, Xing-Rong Wamg, Tai-Yong Shang, Tong Sch. of Mech. Eng. Tianjin Univ. Tianjin 300072 China

The principle of real-time magnetic flux leakage inspection (MFLI) for seamless tube was studied. The calculation methods for characteristic area and characteristic energy applied to intelligent recognition technique for detecting flaws on seamless tube were improved. A new algorithm was proposed and used to calculate the characteristic area and characteristic energy of flow zone on seamless tube. The calculated result of the seamless tube with flaw zone was better than that of the seamless tube without flaw zone by the use of the new algorithm. This scheme is easily realized and favorable to real-time monitor of the quality of steel tube in the manufacturing process. The ratio of the characteristic area of the steel tube with outside flaw to that without flaw is more than 28, and the ratio of the characteristic energies are 900. The ratio of characteristic area of the tube with inside flaw to that without flaw is over 10, and the ratio of the characteristic energy is over 90. This method is very efficient for identifying outside and inside flaws of seamless steel tube.

关键词： Characteristic area Characteristic energy computation method Magnetic flux leakage inspection Seamless tube Time domain analysis

来源：评论

学校读者我要写书评

暂无评论

The determination of the efficiency of optical fibre sensors

引用

JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS 2001年第1期3卷 65-74页

作者： Chita, MA Anghel, S Iorga-Siman, I Vlad, I Univ Pitesti Fac Elect & Electromech Dept Elect Pitesti 0300 Arges Romania Univ Pitesti Fac Sci Dept Phys Pitesti 0300 Arges Romania SNTc Romtelecom SA Pitesti 0300 Arges Romania

The paper presents a calculation method for the determination of the efficiency of temperature probes with optical fibre and fluorescent crystal. An equivalent model is firstly defined, starting fi om the probe effective structure, based on geometrical optics rules and applying the superposition principle. The computation relations for the value of the fluorescence optical flux collected by the receiving fibre were developed as part of the equivalent model. From the value of the fluorescence optical flux related to the excitation optical flux of the emitting fibre, the optical efficiency of the probe can be obtained. The computation of the effective optical efficiency was made numerically, using a computation program elaborated in MATLAB language. The analysis of the values for the efficiency for a probe with cube shaped crystal allowed to find important conclusions regarding the optimum dimensions of the crystal and the maximum value of the efficiency. These conclusions are useful for getting an optimal temperature sensor.

关键词： optical fibre probe sensing head efficiency computation method fluorescent crystal

来源：评论

学校读者我要写书评

暂无评论

Simplified computation method of Vibration Characteristics of Jacket Platforms

引用

China Ocean Engineering 1995年第2期10卷 121-129页

作者： Yang Shengtian Professor, Institute of Engineering Mechanics, State Seismological Bureau, Harbin 150080

In this paper a simplified computation method of natural frequency of jacket platforms is given. Shear, bending and rotary inertia effects are considered in the equation, while the jacket shape, rotary inertia and cen... 详细信息

关键词： natural vibration computation method jacket platform

来源：评论

学校读者我要写书评

暂无评论

A simplified method for the computation of Burke-Schumann flames in infinite atmospheres

引用

COMBUSTION SCIENCE AND TECHNOLOGY 1995年第1-3期104卷 75-91页

作者： Li, SC Gordon, AS Williams, FA [a]Center for Energy and Combustion Research Department of Applied Mechanics and Engineering Sciences University of California CA

Highly overventilated laminar coflow diffusion flames in axisymmetric geometry are addressed for Lewis numbers of unity in the reaction-sheet approximation with effects of buoyancy taken into account. A simple method of numerical integration with the boundary-layer approximation in stream-function coordinates is given, and results for flame structures and for Lagrangian histories are presented for hydrocarbon-air flames. Computed flame heights are shown to be in good agreement with experiment. The computational approach can efficiently employ standard routines on low-power work stations and personal computers.

关键词： diffusion flame computation method

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：