牵引一制动型液力变矩器原始特性研究

 基于束流理论建立了牵引一制动型液力变矩器原始特性参数计算数学模型．对以D430型液力变矩器为原
型设计的牵引一制动型液力变矩器进行了原始特性参数计算，并将计算结果同D430型液力变矩器原始特性参数进
行了比较分析，结论合理． 对设计牵引一制动型液力变矩器具有一定的指导意义．     

轧机锁紧油缸泄漏原因分析及系统改进

济钢第一小型轧钢厂轧机液压换槽系统因工作压力增高，蓄能器压力油长期作用于锁紧缸，引起密封圈击穿、泄漏和机架不稳。通过增设定值减压阀控制油压，改进锁紧油缸结构，解决了锁紧油缸的泄漏问题，保证了轧制线的稳定，轧机作业率由85％提高到87％。     

微型液压钻的应用

介绍国外在特殊场所采用的先进钻孔技术的微型液压钻。它具有可手控的永久磁性基座、独特的刀具结构、有效的火花控制和极大的便携性,适用于特殊环境下的钻孔作业。     

液压启闭机CAD系统研究

简要介绍了在引进支撑环境下独立开发的专用ＣＡＤ系统应用软件－“液压启闭机ＣＡＤ系统”的运行环境、结构特点，主要功能模块的功能、开发过程中碰到的关键技术难点及解决办法。     

Coupling GIS with Hydrologic and Hydraulic Flood Modelling

Geographic Information Systems (GIS) have been recognised as a powerful means to integrate and analyse data from various sources in the context of comprehensive floodplain management. As part of this comprehensive approach to floodplain management, it is very important to be able to predict the consequences of different scenarios in terms of flooded areas and associated risk. Hydrologic and hydraulic modelling plays a crucial role and there is much to gain in incorporating these modelling capabilities in GIS. This is still a rather complex task and research is being done on the full integration of these models. Interfacing between these models and GIS may be a very efficient way of overcoming the difficulties and getting very good results in terms of engineering practice. This paper presents results based on the use of Intergraph GIS coupled with Idrisi GIS. Using these two systems substantially increased the flexibility of using GIS as a tool for flood studies. A lumped (XSRAIN) and a distributed (OMEGA) hydrologic models were used to simulate flood hydrographs. The well known HEC-2 Hydraulic model was used to compute flooded areas. These models were applied in the Livramento catchment with very good results. The computation of flooded areas for different flood scenarios, and its representation in GIS, can be used in the assessment of affected property and associated damages. This is a very useful GIS-based approach to floodplain management.     

SIMILARITY LAW OF FLUCTUATING PRESSURE WITHIN HYDRAULIC JUMP AREA

Through a series of model tests of five scales for 2-D free hydraulic jump, the da-ta of fluctuating pressure acting on the floor level within the hydraulic jump were obtained. Dur-ing the experiments, Froude number varied from 2.94 to 8.61, and Reynolds number rangedfrom 2×10~4 to 6×10~5. Experiment results indicate that the amplitude scale of fluctuating pres-sure is the length scale of model, i. e. P'=L, which agrees with gravity similarity law: Thefrequency scale of the fluctuating pressure is a unity i. e., f=1, which does not satisfy thegravity similarity law.     

面流消能近底紊动流速特性的研究(面流消能试验研究之一)

本文主要论述了面流消能五种典型流态近底紊动流速特性,总结出了近底时均流速和紊动强度沿程变化规律,提出了近底紊动流速可能出现的最大瞬时值及相应位置的计算公式。面流消能工程的下游防冲设计中考虑的主要水力参数之一是,消能段近底流速紊动可能出现的最大瞬时值及其相应的部位,但目前国内外研究成果较少。笔者通过水工模型试验重点研究了面流消能各典型流态近底流速及其紊动纵向分量沿程的变化规律,并提出了计算公式,为优化面流设计提供科学依据。     

液压胀形轧辊油槽深度的确定

对液压胀形轧辊（即国外的ＶＣ轧辊）辊套热装后的弹性变形进行了有限元分析，给出了确定油槽最小深度的计算公式。本文的有限元计算结果与实验结果吻合，某些结论可为液压胀形轧辊的结构设计提供理论依据。     

提升机液压站及制动系统故障分析

通过对TE121液压站及制动系统常见的故障分析,提出解决方案。     

病险水工建筑物可靠性评估方法初探

 水工建筑物可靠性评估是水利工程管理中急需解决的问题，将水工建筑物分解为由分部工程组成的层次结构，引入子系统概率重要性系数，用层次分析法导出水工建筑物系统可靠度指标的实用计算方法。