压力管道安全状况等级的模糊综合评判

基于模糊理论，建立了压力管道安全状况等级评判的模糊评判模型，提出了压力管道安全状况等级的综合评判方法。模型1综合评判中引入了水平截集，模型2’通过引入相关系数因子矩阵，综合考虑了因素间的相互作用对压力管道安全状况等级的影响。最后，给出一算例，证明了模型的正确性。     

在线循环清洗方法在液压系统配管中的应用

介绍了液压系统管路在线循环清洗的特点和工艺,详细描述了具体的实施方法,已在实践中推广应用.该方法可以解决工期紧、冲洗时间短的矛盾,有效提高了生产率.     

管路系统的虚拟设计

针对各种管路系统中的管路在三维空间纵横交错，管路敷设设计工作纷杂繁复的问题，基于管路路径的三维空间数据和3DS Max平台，通过Max Script语言程序和实体造型技术，调用3DS Max的相关命令生成管路的三维实体模型；借助于虚拟现实硬件，在WTK软件平台上调用管路的三维实体模型，实现了管路系统的三维虚拟设计和真实感、沉浸感显示；讨论了WTK软件平台上图形用户界面的设计方法和步骤，完成了管路虚拟设计系统的用户界面设计。     

Effect of damage evaluation method and cyclic hardening models on strain-based fatigue assessment to a piping system under seismic loads

In this paper, strain-based damage assessment based on elastic-plastic FE analysis was carried out for the piping system test under seismic loads conducted     

概念设计中产品安全性评价指标体系的建立和分析

为了解决在概念设计中产品安全性评估问题,建立产品安全性评价指标体系,分析评价体系的各项属性.提出用层次分析法确定各指标权重的安全性评价方法,以提高产品概念设计中的安全性.     

管系载荷对设备设计的影响

基于化工过程的生产特点 ,管系载荷引起的设备应力是不可忽视的。本文讨论了管系载荷对设备壳体、接管、法兰和支座的影响     

An efficient method to predict steady-state vibration of three-dimensional piping system conveying a pulsating fluid

The dynamic equations of motion for a three-dimensional piping system conveying a harmonically pulsating fluid contain time-varying terms attributable to the fluid pulsating in the pipe. In this study, finite element formulation for this three-dimensional piping system was performed. The stiffness and damping matrices in the finite element modeling vary according to time because of the effects of the harmonically pulsating fluid. The frequency-domain method based on eigenvalue analysis cannot be used in this kind of problem. Conventional numerical time-domain methods require substantial computational efforts. An efficient numerical method to predict the steady-state time response of the piping system was presented. In this method, simultaneous equations were constructed by comparing the coefficients of a Taylor series expansion instead of directly solving the problem in the time domain. The accuracy and efficiency of this method were validated by comparison with a conventional numerical integration method.     

可穿戴式柔性外骨骼人机智能系统安全性设计评价

可穿戴式柔性外骨骼人机智能系统的安全性主要取决于系统的机械结构设计、驱动器的选择和布置、保护措施和安全控制策略的设计。为了提高系统的安全性及保护操作者与周围人群的安全,通过对可穿戴式柔性外骨骼人机智能系统设计、使用、维护过程中的要点进行分析,提出了系统安全性评价方法,为今后柔性外骨骼人机智能系统的发展提供了参考。     

清管跟踪定位系统的研究

介绍了一种用单片机控制的管道清洁检测及定位系统。中核心部分是接收机,其性能直接决定系统的特性及实用性。可靠性高的特点。此系统由发射机、接收探头天线、接收机三部分组成,其整个系统具有功能强,体积小,抗干扰能力强,灵敏度及     

Study of a risk-based piping inspection guideline system

A risk-based inspection system and a piping inspection guideline model were developed in this study. The research procedure consists of two parts--the building of a risk-based inspection model for piping and the construction of a risk-based piping inspection guideline model. Field visits at the plant were conducted to develop the risk-based inspection and strategic analysis system. A knowledge-based model had been built in accordance with international standards and local government regulations, and the rational unified process was applied for reducing the discrepancy in the development of the models. The models had been designed to analyze damage factors, damage models, and potential damage positions of piping in the petrochemical plants. The purpose of this study was to provide inspection-related personnel with the optimal planning tools for piping inspections, hence, to enable effective predictions of potential piping risks and to enhance the better degree of safety in plant operations that the petrochemical industries can be expected to achieve. A risk analysis was conducted on the piping system of a petrochemical plant. The outcome indicated that most of the risks resulted from a small number of pipelines.     

工业控制系统安全性防护方法研究

随着我国信息技术的飞速发展和计算机技术在工业领域的应用,制造业工厂工业生产质量和效率得以提升。工业控制系统的安全性问题在工业网络接入的同时,由传统的物理、功能安全逐渐侧重向信息安全。针对工业控制系统安全性防护问题,分析了工业控制系统物理、功能、信息安全三者的区别和联系,阐明综合的安全性防护的必要性,从已有的三种安全防护基础,提出初步的工业控制系统安全性防护要求,望可为工业控制系统安全性防护的发展提供参考。     

三维管道空间布置系统的设计与实现

以JhSolid为应用平台,以C 语言为开发工具,采用面向对象的技术开发的三维配管设计软件,能够快速自动生成管线和实体,并能根据设计要求编辑修改。论述本系统开发的流程和管道几何模型、特征模型建立方法,以及管线、管道的编辑等技术的实现方法。     

Vibration analysis of compressor piping system with fluid pulsation

A piping system connected to a rotary compressor is an essential component for refrigerant transport in air-conditioning systems. The vibration of the pipes has been thought to be generated only by the mechanical forces due to the compressor operation. In this study, the fluid pulsation in the pipe is considered to be a source of the vibration, as well as the mechanical forces by the compressor operation. The mechanical force was first identified experimentally using measured acceleration signals over the shell. The calculation of the fluid force resulting from the pulsating fluid in the pipe was then derived theoretically. The estimation used the pressure pulsation signal in the pipe measured by a pressure transducer. Both sources of the vibration were finally applied to the finite element model of the piping system. Conclusively, the prediction of the vibration response to both sources showed better agreement with the experimental results than prediction considering only the mechanical force. Therefore the theoretical process deriving the fluid force was valid.     

贮氢压力系统缺陷分析及安全评定方法研究

贮氢压力容器是用于加注、贮存及快速释放氢的小型装置,结构安全性是服役期内关注的重点。检测分析表明：系统在电子束焊接区域存在结构缺陷,主要为底部（内侧）未焊透。对于含缺陷的压力系统,采用失效评定圈（FAD）及裂纹扩展计算方法进行结构安全评估是一种有效手段。基于缺陷检测结果,综合考虑系统结构、长期贮氢及飞行载荷条件特点,研究制定相应结构安全评定的程序及项目,可为评估贮氢压力系统的结构安全性提供依据。     

加油车管路系统虚拟设计技术应用

针对加油车管路系统方案设计和零部件安装中的返工问题，提出以三维总体布置备为核心的虚拟设计方案，在计算机中创建出管路系统虚拟样式，大大节约了管路系统设计安装的成本，加速了加油车研制进程。     

规则评估方法与数据质量挖掘系统

为从数据挖掘结果中获得真正有用的规则,探讨了评估规则的度量,提出了度量关系的新概念,并应用于发现与评估有用规则集的算法中.经过度量函数之间的相关分析,确定适合的度量,并据此对规则进行兴趣度评估,指导用户对有用规则的选择.此外,为了解决数据集成系统中存在"垃圾"数据的问题,提出了数据质量挖掘与控制系统框架,将数据挖掘规则应用于数据质量管理中.使用经过评估筛选得到的规则,能够检测数据库中的异常和不完整数据,解决数据集成过程中部分数据质量问题.通过企业信息集成实例,说明了规则评估及应用方法的有效性.     

绿色制造的生态评价体系及方法研究

以生态文明的实现为核心,构建了绿色制造产品与过程的生态评价体系,相较于传统的绿色评价,其特点在于需要追溯产品与制造过程的生态源头,并且在生命周期的各个阶段都要考虑对生态环境造成的影响,尤其对于不能再制造再利用的需要掩埋的排放物以及经过处理之后的空气排放物和水排放,要考虑生态的自净化能力。同时,以缓解6大生态危机为评价核心建立了相应的生态评价方法,将LCA与层次分析法相结合,得到绿色制造产品与过程的生态文明指数,并通过某阀体车削工艺过程的实例分析证明了生态评价方法可以评定其是否符合在生态文明下的绿色性要求。     

AHP法在校园网系统质量评价体系中的应用分析

通常对校园网只能给出定性的评价,却很难给出比较合理的定量的评价,本文主要论述的就是如何利用AHP法对校园网给出比较科学和合理的定性与定量相结合的评价方法.     

压缩机及其管道系统振动噪声研究综述

综述了压缩机及其管道的噪声产生机理，同时总结了压缩机及其管道噪声的传播途径，提出了减振降噪的措施。     

绿色制造系统能值评价方法与评价指标的研究初探

首先阐述了绿色制造理念，并在此基础上结合系统的思想试探性地提出了绿色制造系统的概念。然后从以货币为基础的经济系统评价方法的弊端出发，引出了能值分析方法，并将其应用于绿色制造系统发展性能的评价，即绿色制造系统的能值评价指标。