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基于随机有限元的混凝土重力坝可靠度分析

水电能源科学 2009年第5期27卷 72-74页

作者：李树山解伟郑州大学环境水利学院河南郑州450002 华北水利水电学院水利学院河南郑州450011

在线弹性有限元法基础上将荷载与抗力作为随机变量,根据单元可靠指标计算公式编制了可靠度计算程序。通过对混凝土重力坝单元可靠度计算,分析了混凝土重力坝坝体可靠度分布规律、破损位置及失效概率。结果表明,该方法是混凝土重力坝安... 详细信息

在线弹性有限元法基础上将荷载与抗力作为随机变量,根据单元可靠指标计算公式编制了可靠度计算程序。通过对混凝土重力坝单元可靠度计算,分析了混凝土重力坝坝体可靠度分布规律、破损位置及失效概率。结果表明,该方法是混凝土重力坝安全评价的一种行之有效的方法。

关键词：混凝土重力坝可靠度随机有限元法随机变量极限状态

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作物在线实时灌溉制度研究及其管理软件研制

节水灌溉 2011年第8期 55-57,60页

作者：马建琴李明华北水利水电学院水利学院河南郑州450011

针对已有作物灌溉预报中未能充分利用降雨的不足,特别是在应用实施时缺乏可操作性问题,基于实时的气象与土壤墒情监测数据,利用田间水量平衡原理和作物根系生长模拟技术,提出了充分利用降雨的实时灌溉制度模型,并用Java语言编制了网络... 详细信息

针对已有作物灌溉预报中未能充分利用降雨的不足,特别是在应用实施时缺乏可操作性问题,基于实时的气象与土壤墒情监测数据,利用田间水量平衡原理和作物根系生长模拟技术,提出了充分利用降雨的实时灌溉制度模型,并用Java语言编制了网络计算机软件,以冬小麦作为研究对象,通过实验研究与软件调试,实现了对作物灌溉的远程及实时调控。该方法与软件可有效地利用当地降水资源,实现灌溉的远程管理,适合在我国北方灌区推广使用。

关键词：灌溉制度降雨土壤墒情

Fountain Simulation Based Particle System for Virtual Scene

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Fountain Simulation Based Particle System for Virtual Scene

2010 International Conference on Computer and Communication Technologies in Agriculture Engineering (CCTAE 2010)

作者： Dong Wensheng institute of Yellow River Research north china institute of water conservancy and hydroelectric power zhengzhou china Zhang Caijun AnYang power Supply Company AnYang china

Fountain is a part of virtual city *** paper describes a method of fountain simulation based on particle *** on the analysis of the motion of fountain,motion fields of fountain are simplified,which makes the fountain simulation *** make the fountain simulation more vivid,the paper realizes the water wave effect after the particle dropped into the *** addition,we also add skybox and the sound of fountain,which make the simulation more realistic not only from your sense of sight but also your sense of *** proposed algorithm can be easily integrated into simulation of natural scenery.

关键词： particle system fountain simulation virtrual reality water wave

Design on the Supervisory Control and Data Acquisition System for Longnan water Corporation

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Design on the Supervisory Control and Data Acquisition Syste...

2010 2nd IEEE International Conference on Advanced Management Science（IEEE ICAMS 2010）

作者： Xin Ma School of Management and Economic north china University of water conservancy and Electric power zhengzhou china 450011

Modern management system consisted by electronic communication technology and comprehensive automation technology is important for water enterprise because the water dispatched model is high timely demand, distribution, network and variables. The supervisory control and data acquisition （SCADA） system is an advanced technology to solve the signal collection and transformation problem from up point to down points in order to automatic control and dispatch the water enterprise. A new SCADA system is designed for Longnan water corporation based on Ethernet and remote terminal unit （RTU）. The entire data acquisition and control integration in water treatment process can be effectively implemented through application of the SCADA system.

关键词： water supply SCADA system Ethernet RTU

ANALYSIS ON THE SENSITIVITY OF THE FLUVIAL PROCESS IN ALLUVIAL RIVER

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International Journal of Sediment Research 1994年第3期 9-16页

作者： CAO Wcnhong and ZHANG Qishun(Research Engineer, institute of water conservancy and hydroelectric power Research, Beijing,100044, china)( institute of water conservancy and hydroelectric power Research, Beijing, 100044,china)

ＡＮＡＬＹＳＩＳＯＮＴＨＥＳＥＮＳＩＴＩＶＩＴＹＯＦＴＨＥＦＬＵＶＩＡＬＰＲＯＣＥＳＳＩＮＡＬＬＵＶＩＡＬＲＩＶＥＲ￥ＣＡＯＷｃｎｈｏｎｇａｎｄＺＨＡＮＧＱｉｓｈｕｎ（ＲｅｓｅａｒｃｈＥｎｇｉｎｅｅｒ，Ｉｎｓｔｉｔｕ...

ＡＮＡＬＹＳＩＳＯＮＴＨＥＳＥＮＳＩＴＩＶＩＴＹＯＦＴＨＥＦＬＵＶＩＡＬＰＲＯＣＥＳＳＩＮＡＬＬＵＶＩＡＬＲＩＶＥＲ￥ＣＡＯＷｃｎｈｏｎｇａｎｄＺＨＡＮＧＱｉｓｈｕｎ（ＲｅｓｅａｒｃｈＥｎｇｉｎｅｅｒ，ＩｎｓｔｉｔｕｔｅｏｆＷａｔｅｒＣｏｎｓｅｒｖａ...

关键词：

浸没边界方法在翼型绕流大涡模拟中的应用研究

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水力发电学报 2011年第4期30卷 202-207页

作者：李延频周兵华北水利水电学院电力学院郑州450011 国家知识产权局专利审查协作中心北京100190

本文首先给出了有限体积数值离散中,采用双线性速度插值的直接强迫力浸没边界方法的数值实现公式推导;采用该方法对翼型绕流进行了大涡数值模拟的初步研究,大涡模拟的亚格子应力采用基于Germano等式和尺度相似假设的SDP动力模式,模拟结... 详细信息

本文首先给出了有限体积数值离散中,采用双线性速度插值的直接强迫力浸没边界方法的数值实现公式推导;采用该方法对翼型绕流进行了大涡数值模拟的初步研究,大涡模拟的亚格子应力采用基于Germano等式和尺度相似假设的SDP动力模式,模拟结果与文献的DNS结果一致,表明SDP模式于本文的浸没边界方法的结合可以实现对复杂流动的精确模拟。

关键词：计算流体力学浸没边界方法大涡模拟翼型绕流

STUDY ON THE AIRFLOW RESISTANCE IN NATURAL DRAFT COOLING TOWERS

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Journal of Hydrodynamics 1994年第3期6卷 7-14页

作者： Zhao Zhen-guo, Shi Jin-ling, Chen Xian-songDepartment of Cooling water, institute of water conservancy and hydroelectric power Research (IWHR),Beijing 100044, P. R. china

A new approach for improving the calculation of the airflow resistance coefficient of natural draft cooling towers from the inlet to throat (4) has been presented in this paper. The suggested equations areWhere. ζ1 is the coefficient of the airflow resistance with no consideration of waterdrop in rain zone, ζ2 is the coefficient of the airflow resistance due to falling of waterdrop in rain zone, s is the rate of the inlet area to the area at elevation of the packing, q is the water loading, V0 air velocity at the packing section.

关键词： natural draft cooling towers airflow resistance.

A Series of Modified Yield Criteria with Four Parameters for Rock Masses

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A Series of Modified Yield Criteria with Four Parameters for...

作者： Zhang Jingjian Tu Jinliang Sun Dafeng (north china institute of water conservancy and hydroelectric power)

In this paper,a series of yield criteria with non-circle in section are derived and discussed. The convexity and smoothness of the proposed criteria are *** are four parameters(A,B,C andΦ)in the proposed *** 1/A is the limit of octahedral shear *** B is a parameter which represents indirectly the effect of the middle principal *** C andΦare the cohesion and the friction angle same as in Mohr-Coulomb *** B is equal to 0,the proposed criterion changes into the extended Mises *** B is equal to 1,the proposed criterion changes into the Zienkiewiz-Pande *** addition,the proposed criterion may reflect the strainsoftening property of rock mass and may also express the rock mass property from brittleness to ductility when the spherical compressure of rock mass is *** proposed series of yield criteria are convenient and reliable in the application of engineering practice.

关键词：

THE NUMERICAL SIMULATION OF TWO-DIMENSIONAL OPEN CHANNEL TURBULENCE

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Journal of Hydrodynamics 1993年第3期5卷 89-97页

作者： Guo Qing-chao Hart Qi-wei Research Centre on Disaster and Environment,institute of water conservancy and hydroelectric power Research,Beijing 100044,P.R.china

A numerical simulation on 2-D open channel turbulence using the two-equation turbulent model(k-e model) is *** diseretization equations of depth-averaged 2-D differ- ential equation are obtained by the control-volume *** examples including the flows in straight open channel,symmetry sudden expansion and one-side sudden expansion are calculated by using the SIMPLE *** distributions of the flow velocity u,the kinetic turbulent energy k,and the turbulent viscosity μ,*** *** numerical calculations indicate a good agreement with experimental data and other turbulent models calulations.

关键词： numerical simulation turbulence open channel