【作者】 宋九祥；

【导师】 单建；

【作者基本信息】 东南大学 ， 结构工程， 2005， 硕士

【摘要】 在电力市场需求的推动之下,国内的几家大型锅炉厂家先后开发了一批600MW等级锅炉的新炉型。由此带来的锅炉钢结构大板梁的巨型化,给大板梁的设计、制造、运输和安装都带来了一系列新的课题。　目前锅炉厂已经成功的解决了大板梁沿高度分为两层分别制造后再在现场拼接的技术问题,然而对于大板梁在长度方向的分段制造现场拼接方法的研究实施,在国内外锅炉行业中尚无先例。　本文以某锅炉钢结构工程为背景,对其拼接问题进行了系统的研究,并对预应力技术在锅炉钢结构中的应用作了初步的探讨,主要工作如下:1.利用四种单元形式对该工程大板梁J进行了对比计算,综合考虑计算要求的精度和计算时间,最终选取八节点实体单元作为大板梁整体分析计算的单元形式。　2.对拼接处进行了简化计算分析的研究,得到既能保证计算精度又节省计算时间的简化计算模型。　3.对影响连接处摩擦力损失的各种因素做了系统的分析,得出各种情况对摩擦力损失的具体影响数值。　4.提出了修正的精确计算设计法,利用此法对上述大板梁J进行了设计分析,发现此法切实可行,准确可靠。　5.对预应力技术在大板梁工程中的应用进行了介绍,并以此对上述大板梁J进行了设计。　6.综合应用以上成果,作者利用APDL(ANSYS　Parametric　Design　Language)参数化语言进行ANSYS的二次开发,得到一个高效、实用、准确可靠的软件程序,对于以后进行大板梁设计可以大大提高工作效率。更多还原

【Abstract】 Under the push of electric market demand, several domestic large-scale boiler producers successively developed the new stove type of a batch of 600MW grades boiler. At the same time, the board girder is getting huge with the grade improving of boiler, which bring board girder’s design , manufacture, transport and construction a series of new subject.The technological problem of dividing board girder into two in the height direction and then connection on the spot has been solved. But the implementing of research of dividing board girder into two in the length direction has not been reported in the boiler trade at home and abroad. Based on the current progress on board girder’s connection, the main work of this paper is as follows: 1. Four kinds of element i.e. beam element, shell element eight nodes solid element and twenty nodes solid element are used respectively and the results are compared. Eight nodes solid element is better than others considering both precision and calculating time. 2. The research of computational analysis to simplify calculating is done. A model that satisfy precision and calculating time requires is get. 3. Systematic analysis to various kinds of factors which influenced junction frictional force losses is done. And the concrete influence values to frictional force losses of various kinds of situations are drawn. 4. The revised method of designing in accuracy calculating is put forward, which is reliable to design the joint connection of the above board girder J. 5. An introduction to the application of prestressing technology in the board girder is made, so as to design the above board girder J. 6. Based on the above achievement, a secondary development software developed by APDL (ANSYS Parametric Design Language ) parameter language is get, which is high-efficient, practical, accurate and reliable. It can improve working efficiency greatly on the connection design of board girder.更多还原