Study on early warning index of spatial deformation for high concrete dam

Owing to the deficiency in early warning for high concrete dam,a formula was established to characterize the deformation behavior of high concrete dam as a whole.The early warning index of spatial deformation was calculated by low probability principle on the basis of the deformation entropy formula proposed.The steps were as follows.Firstly,the probability method was utilized to define the degree of order and degree of chaos for each survey point.Secondly,the weight distribution among the survey points was...     

一种新型水轮发电机组智能模糊控制系统

本文提出了一种新型的水轮发电机组智能模糊控制系统。它充分利用一有水轮机调速器的硬件资源,在进行智能模糊实时控制的同时,以神经网络贯穿对水轮机系统的和学习,从而圆满地解决了以往智能控制学习时由于模型未知而无法求反向传播误差的问题。     

引子渡水电站面板堆石坝设计

结合引子渡工程特点介绍钢筋混凝土面板堆石坝的布置和分区结构设计。     

NUMERICAL ANALYSIS OF WATER SURFACE PROFILE IN RIVER AFFECTED BY TIDE FLUCTUATION

A Finite Difference Method with four points weighted implicit scheme and Newton-Raphson iteration method are introduced to complete the flood routing in the tidal river. The problems related to normalization of cross-sectional area and optimization of weighting factor α are discussed and α = 0. 5 - 0. 7 is suggested. With such a α, high accuracy, stable and convergence results and flexible time step will be expected. The computational example of a tidal river in Liaoning Province shows the good agreement with the measuring data on prototype.     

丹江口水利枢纽工程建设概况

介绍了丹江口水利枢纽的开发规划初期工程的枢纽布置及主要建筑物;重点介绍了续建计划中的大坝加高工程及水利枢纽主要的社会经济效益。     

考虑弹塑性本构的三维模态变形体离散元方法断裂模拟

三维模态变形体离散元(3MDEM)是针对离散块体系统在小应变、有限位移、有限转动条件下,用变形模态模拟块体变形,经过严格推导建立的一种离散元方法.该文在3MDEM平台实现对结构从弹性、到塑性再到断裂破坏的连续非连续全过程模拟.鉴于传统的接触破坏准则在塑性计算中的缺陷,该文提出基于塑性应变的接触破坏判断准则,并采用双块体...     

3-D NUMERICAL STUDY OF LAMINAR AND TURBULENT FLOW INSIDE A 90-DEG-BEND SQUARE AND FLAT DUCT

With the application of body-fitted coordinate method and the standard k-epsilonequations,the rtumericat sotution to the averaged N-S equations is obtained.Laminar and turbu-tent flows inside a 90-Deg-Bent duct are studied,yielding good results.     

引子渡水电站大坝施工监理与质量控制

本文从大坝施工监理的实际情况出发,着重阐述如何在大坝施工监理的具体实践中,及时调整监理理念,因地制宜地把国内外面板堆石坝施工管理中行之有效的质量控制方式与引子渡水电站实际情况相结合进行施工监理。     

引子渡水电站厂房设计

引子渡水电站为引水式地面厂房,厂区布置紧凑,无施工干扰。由于施工工期紧,设计上采用轻型屋面网架结构、钢结构吊车梁等优化设计,施工采用滑模施工技术代替传统混凝土浇筑方法,对缩短工期起到了有效作用,解决了目前在建工程工期短的一些问题。