基于电磁加热的悬索桥主缆除湿系统研究

发布时间：2018-01-04 03:36

本文关键词：基于电磁加热的悬索桥主缆除湿系统研究　出处：《广西科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：在悬索桥设计理论中,主缆的设计寿命与桥梁的设计寿命等同,是不考虑更换的,其承担了全桥上部结构所有的静载和动载。因此,主缆对于悬索桥来说至关重要,是悬索桥的生命线。悬索桥主缆的除湿问题是世界各国致力于解决的主要问题之一。目前有一定应用场合的系统主要是日本提出的应用干燥空气注入法的除湿系统。该除湿系统对主缆进行整体除湿,系统庞大,投资大,运行成本高,在国内只有个别桥梁在应用,难于推广。悬索桥主缆内空气湿度是影响主缆钢丝受到腐蚀的主要因素,若腐蚀严重将影响其承载力和使用年限。因此,本文提出一种基于电磁感应加热的悬索桥主缆除湿系统。本文主要介绍了除湿的依据;对感应加热电源系统方案进行了比较;给出了电磁感应加热装置的总体结构,并对其工作原理进行了分析;阐述了电磁感应加热原理适用于主缆除湿;给出了装置的主要指标,并对除湿装置主要部件(整流电路、滤波电路、IGBT选型、半桥谐振电路及隔离触发电路)的参数选取进行了详细的分析。最后以悬索桥主缆为实验对象,对其展开电磁感应加热除湿实验。本实验是在柳州欧维姆机械股份有限公司的实验中心进行的,实验分别采用了15kW、20kW、25kW、30kW等不同功率对主缆进行加热,通过大量的实验得出的数据可知,在相同的加热时间内,当加热功率为30kW时,达到了主缆除湿的效果,即每一个位置的湿度值都控制在60%RH以内,达到了除湿的目的。迄今为止还没有人做过相关的实验,更没有将电磁加热利用在悬索桥主缆除湿上面,所以基于电磁加热的悬索桥主缆除湿系统具有一定的创新性和前沿性,实验具有一定的探索性和验证性,很多实验方案、步骤及经验都是通过逐步地去尝试和验证而得来的。因此,选择适宜的加热功率、缠绕与之匹配的线圈,通过大量的实验得出,将电磁感应加热技术应用到悬索桥主缆除湿上面是可行的,最终能够实现悬索桥主缆除湿的目的。
[Abstract]:The suspension bridge design theory, equivalent design life design life and bridge main cable, is not considered a replacement, the assumption of full bridge superstructure all static loading and dynamic loading. Therefore, it is essential for the main cable suspension bridge, suspension bridge is the lifeline. Dehumidification problem of the main cable of suspension bridge is the world is committed to one of the main problems. The system currently has some applications is the main application of dry air dehumidification system of Japan proposed injection method. The whole of the desiccant dehumidification system, the main cable system is large, large investment, high operation cost, in the domestic only individual bridge in the application, difficult to promote air humidity. The main cable suspension bridge is the main factor affecting the main cable wire from corrosion, if serious corrosion will affect the bearing capacity and service life. Therefore, this paper proposes a kind of main cable of suspension bridge based on electromagnetic induction heating in addition Wet system. This paper mainly introduces the basis of dehumidification; induction heating power supply system are compared and analyzed; given the overall structure of electromagnetic induction heating device, and analyses its working principle; expounds the principle of electromagnetic induction heating for main cable dehumidification; the main index of the unit are given, and the main components of dehumidification device (rectifier circuit, filter circuit, IGBT selection circuit and isolation resonant trigger circuit) are analyzed in detail. Finally the parameter selection of suspension bridge main cable as the experimental object, launches the electromagnetic induction heating dehumidification experiment on it. The experiment was performed at the experimental center of Liuzhou ouweimu machinery Limited by Share Ltd, experiments. Using 15kW, 20kW, 25kW, 30kW etc. different power heating of the main cable, through lots of experiment data shows that in the same heating time, when the heating power is 30kW When reached the main cable dehumidification effect, namely each position humidity was controlled within 60%RH, reached the purpose of dehumidification. So far, no one has done the related experiment, but there is no use of electromagnetic heating in the main cable dehumidification suspension bridge, so the main cable dehumidification system of electromagnetic heating cable the bridge has a certain degree of innovation and pioneering based on experiment has certain exploratory, a lot of experimental scheme, steps and experiences are step by step to try and verify to come. Therefore, choosing suitable heating power, winding coil matching, through lots of experiments, the the electromagnetic induction heating technology was applied to the main cable dehumidification suspension bridge above is feasible, and ultimately to achieve the purpose of suspension bridge main cable dehumidification.

【学位授予单位】：广西科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.25

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