Finite element method ( FEM) was used to partition the area of buried cables with outer heat sources and calculate the temperature field with given cable load. 利用有限元法对有外部热源的直埋电缆区域进行剖分,计算了给定电缆负荷的温度场。
This is used for locating various faults of the cables for the city cable, high frequency communication cable, buried cable and medal overhead cable line. 用于测量各种市话电缆、高频通信电缆、地埋电缆及金属架空电缆上发生的开路(断线)、短路、接触不良接地等各种电缆故障。
Take the measure of the breakdown of buried cable as an example, the measure method and the fixed-point skill of the buried cable fault were analyzed briefly. 以地埋电缆发生故障测寻故障点为例,就地埋电缆故障测寻方法与定点技巧进行简要分析。
A new type of rural buried cable suitable for use in subtropical area is presented. 介绍了一种运用于湿热带的新型农用直埋电缆。
Calculation of Static Temperature Field of Buried Cable Based on FEM and Analysis of Influential Factors 有限元法计算地下电缆稳态温度场及其影响因素
The system allows deployment of any combination of fence, buried cable, and microwave solutions. 该系统可以部署任何围栏、地下电缆的组合以及微波解决方案。
It provides fence, buried cable, and digital micro wave protection alternatives with single-platform networking. 它提供了配合独立网络平台使用的围栏、地下电缆和数字微波的保护方案。
Discussion of Fast Detective Method for Electric Leakage of Buried Cable for Geoelectric Filed Observation 谈地电场地埋电缆出现漏电现象快速检测的方法
The FDTD Simulation Analysis of the Couple between Electromagnetic Pulse and the Buried Cable 电磁脉冲对埋地电缆耦合的FDTD仿真分析
When lightning strikes a direct buried communication cable, the over voltage produced on the cable is inevitable. 雷击直埋通信电缆产生的过电压危害非常严重。
Based on the in situ measurement of insulation resistance against ground of buried cable and optical cable, corrosion rate of carbon steel, brass, lead and aluminium, as well as soil environmental factors, regularities of soil corrosion have been investigated. 通过对直埋电缆、光缆对地绝缘电阻、对碳钢、黄铜、铅、铝的腐蚀率及土壤环境因素的原位连续测试,研究电缆、光缆及金属护套材料的土壤腐蚀规律。
The Analysis and Evaluation on the Heating of the Buried Exothermic Electric Cable 埋地发热电缆采暖的分析与评价
Discussion on the marks of buried cable in City 浅谈城市直埋电缆的标志问题
Brief account of the detection technique of buried pipeline and cable 地下管线探查技术概述
External Force's Effect on Cable& The Serious Effect on Buried Cable Caused by Heavy-duty Machinery 外力施工对光缆的影响&重型机械对直埋光缆的影响
On economic results between direct-buried utilidor and trench roughing-in A new type of rural buried cable 直埋保温管道与地沟敷设管道经济效益分析新型的农用直埋电缆
Because the power cable is buried in the ground and its running environment is complicated, so the diagnosis of cable fault location is very difficult. 电力电缆埋藏于地下,运行环境复杂,因此进行电缆的故障诊断比较困难。
Accurate Measurement for Failure Points of Directly Buried Cable 直埋电缆故障点的精测
A new type of rural buried cable Design of Buried Oil Tank 新型的农用直埋电缆地埋式油罐的设计
Ampacity Calculation for Groups of Buried Cable 土壤直埋电缆群额定载流量的计算
Obtained by numerical simulation of buried fiber optic cable when the TDR depth of 2m, you can get the best detection results. 通过数值模拟得出当TDR同轴电缆埋设深度为2m时,可以得到最佳检测效果。
Due to environmental corrosion, insulation aging, man-made damage and defects in power cables and other factors itself, buried power cable fault has Often occurred. 由于受环境腐蚀、绝缘层老化、人为破损以及电力电缆本身缺陷等因素的影响,地埋电力电缆故障时有发生。
Steel shielding layer can effectively reduce the role of the higher frequency components in lightning electromagnetic pulse, So 400kHz~ 1MHz frequency components of lightning induced voltage on buried control cable are significantly reduced. 钢带屏蔽层能够有效地降低雷电电磁脉冲中较高频率分量的作用,从而使控制电缆雷电感应电压400kHz~1MHz的频率分量大幅度减少。
This paper aims to make a research on a method of diagnosing buried power cable fault: A brief analysis of the research background and the trends of the cable fault diagnosis technology is given. 本文旨在研究一种用于检测地埋电力电缆故障点的定位方法。主要工作包括:分析课题的研究背景和电缆故障检测技术的发展趋势。
Meanwhile, a variety of laying ways are used for the cable installation, such as directly buried laying, cable duct laying, tunnel laying, pipe laying and so on, by which the economy and reliability of the cable operation are affected directly. 同时,电缆的敷设方式多种多样,如直埋、电缆沟、隧道、排管敷设等。不同的敷设方式,将直接影响到电缆运行的经济性和可靠性。
When the hole is collapsing and drill bit is being buried, with the help of auxiliary lift of steel cable, it can use the self-rescue device fixed on the rodless drilling unit to startup the self-rescue. 通过在无钻杆钻具上方安装自救装置,当塌孔埋钻事故发生时,可以通过启动无钻杆钻具自救装置,在钢丝绳的辅助提升作用下,进行自救。
Temperature distributions of buried cable were analyzed according to the knowledge of heat transfer. After constructing heat conduction equation and boundary condition, a single-core cable model was built using the professional finite element method software. 结合传热学知识对单芯电缆温度场进行分析,构造出热传导方程和边界条件,采用专业有限元软件建立了单芯电缆的温度场模型。