考虑机械振动的风机设备两种隔震方案对比研究
发布时间：2018-11-22 07:54
【摘要】：历次震害表明，地震会对核电站及其设备的安全性造成严重威胁，引发严重的核安全问题。随着我国核电站的不断建设，积极开展核电设备抗震研究十分必要。采用隔震技术可以改善核电设备的可靠性和安全性，并且具有良好的隔震效果和经济效益。核级风机等核电设备在正常运转时将产生机械振动，当地震来临时，正在运行的风机设备将同时受到地震作用和机械振动的影响，因此，对核级风机设备采用隔震技术时，所安装的隔震装置需要在地震动和机械振动共同作用下对风机设备起到隔震减振的目的。 本文对考虑机械振动的核级风机设备采用两种隔震方案，分别是钢丝绳隔振器方案和叠层橡胶支座方案，通过有限元分析，对两种隔震方案的隔震效果进行对比研究。本文首先介绍了设备震害、隔震原理、设备隔震技术的发展应用现状和设备隔震的相关规范要求；其次介绍了两种隔震装置的构造、原理和力学性能，为后文进行风机设备隔震系统的有限元分析提供了理论基础；以某型核级风机为例，利用ANSYS-LSDYNA有限元软件建立了采用钢丝绳隔振器的风机模型，对用于风机隔震的钢丝绳隔振器参数进行了优化选择；根据得到的优化参数，分别建立了采用钢丝绳隔振器和叠层橡胶支座的风机模型，通过有限元分析，对两种隔震方案及其改进方案的风机系统隔震效果进行了对比研究。 研究结果表明：对于考虑机械振动的风机隔震系统，钢丝绳隔振器方案虽然在三方向都有隔震作用，但是隔震效果并不明显；而叠层橡胶支座方案水平向隔震效果优于钢丝绳隔振器方案，但竖向几乎没有隔震效果，有时还会加大竖向地震作用。对两种方案进行改进后，改进方案的隔震效果优于原方案。因此，为实现改进方案，满足风机隔震要求，建议研究出水平刚度较低但竖向刚度较高的钢丝绳隔振器，或研究出低刚度的叠层橡胶支座。若能将改进后的钢丝绳隔振器和叠层橡胶支座结合起来，研究出适用于风机设备三维隔震的新型隔震装置，则能更好地满足核级风机设备的隔震要求。
[Abstract]:The earthquake damage shows that the earthquake will pose a serious threat to the safety of nuclear power plant and its equipment, and cause serious nuclear safety problems. With the continuous construction of nuclear power plants in China, it is necessary to actively carry out seismic research on nuclear power equipment. Seismic isolation technology can improve the reliability and safety of nuclear power equipment, and has good isolation effect and economic benefit. Nuclear fan and other nuclear power equipment will produce mechanical vibration in normal operation. When the earthquake comes, the running fan equipment will be affected by both seismic action and mechanical vibration. Therefore, when the isolation technology is used for nuclear grade fan equipment, The installed isolation device should be used to isolate and reduce the vibration of fan equipment under the combined action of ground motion and mechanical vibration. In this paper, two kinds of isolation schemes are adopted for nuclear blower equipment considering mechanical vibration, one is wire rope isolator scheme and the other is laminated rubber bearing scheme. Through finite element analysis, the isolation effects of the two isolation schemes are compared and studied. This paper first introduces the equipment earthquake damage, isolation principle, equipment isolation technology development and application status and equipment isolation requirements; Secondly, the structure, principle and mechanical properties of the two kinds of isolation devices are introduced, which provides a theoretical basis for the finite element analysis of the isolation system of fan equipment. Taking a nuclear grade fan as an example, a fan model with wire rope vibration isolator is established by using ANSYS-LSDYNA finite element software, and the parameters of wire rope vibration isolator used for fan isolation are optimized. According to the optimized parameters, the fan models with wire rope isolator and laminated rubber bearing are established, and the isolation effects of two isolation schemes and their improved schemes are compared by finite element analysis. The results show that: for the fan isolation system considering mechanical vibration, although the cable isolator has isolation effect in three directions, the isolation effect is not obvious. The horizontal isolation effect of laminated rubber bearing scheme is better than that of wire rope isolator scheme, but the vertical vibration isolation effect is almost no, and sometimes the vertical seismic action is increased. After improving the two schemes, the isolation effect of the improved scheme is better than that of the original scheme. Therefore, in order to improve the scheme and meet the requirements of fan isolation, it is suggested to develop wire rope isolators with low horizontal stiffness but high vertical stiffness, or laminated rubber bearings with low stiffness. If the improved wire rope vibration isolator is combined with the laminated rubber bearing, a new type of isolation device suitable for the three dimensional isolation of the fan equipment can be developed, which can better meet the isolation requirements of the nuclear grade fan equipment.
【学位授予单位】：中国地震局工程力学研究所
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU352.12
本文编号：2348585
[Abstract]:The earthquake damage shows that the earthquake will pose a serious threat to the safety of nuclear power plant and its equipment, and cause serious nuclear safety problems. With the continuous construction of nuclear power plants in China, it is necessary to actively carry out seismic research on nuclear power equipment. Seismic isolation technology can improve the reliability and safety of nuclear power equipment, and has good isolation effect and economic benefit. Nuclear fan and other nuclear power equipment will produce mechanical vibration in normal operation. When the earthquake comes, the running fan equipment will be affected by both seismic action and mechanical vibration. Therefore, when the isolation technology is used for nuclear grade fan equipment, The installed isolation device should be used to isolate and reduce the vibration of fan equipment under the combined action of ground motion and mechanical vibration. In this paper, two kinds of isolation schemes are adopted for nuclear blower equipment considering mechanical vibration, one is wire rope isolator scheme and the other is laminated rubber bearing scheme. Through finite element analysis, the isolation effects of the two isolation schemes are compared and studied. This paper first introduces the equipment earthquake damage, isolation principle, equipment isolation technology development and application status and equipment isolation requirements; Secondly, the structure, principle and mechanical properties of the two kinds of isolation devices are introduced, which provides a theoretical basis for the finite element analysis of the isolation system of fan equipment. Taking a nuclear grade fan as an example, a fan model with wire rope vibration isolator is established by using ANSYS-LSDYNA finite element software, and the parameters of wire rope vibration isolator used for fan isolation are optimized. According to the optimized parameters, the fan models with wire rope isolator and laminated rubber bearing are established, and the isolation effects of two isolation schemes and their improved schemes are compared by finite element analysis. The results show that: for the fan isolation system considering mechanical vibration, although the cable isolator has isolation effect in three directions, the isolation effect is not obvious. The horizontal isolation effect of laminated rubber bearing scheme is better than that of wire rope isolator scheme, but the vertical vibration isolation effect is almost no, and sometimes the vertical seismic action is increased. After improving the two schemes, the isolation effect of the improved scheme is better than that of the original scheme. Therefore, in order to improve the scheme and meet the requirements of fan isolation, it is suggested to develop wire rope isolators with low horizontal stiffness but high vertical stiffness, or laminated rubber bearings with low stiffness. If the improved wire rope vibration isolator is combined with the laminated rubber bearing, a new type of isolation device suitable for the three dimensional isolation of the fan equipment can be developed, which can better meet the isolation requirements of the nuclear grade fan equipment.
【学位授予单位】：中国地震局工程力学研究所
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU352.12
【参考文献】
相关期刊论文 前10条
1 陈维民，，刘钢，刘玉兰;环形钢丝绳减振器刚度和阻尼性能试验研究[J];材料科学与工艺;1996年01期
2 张敏政,孟庆利,裴强;叠层橡胶隔震支座的动态稳定性和力学特性研究[J];地震工程与工程振动;2002年05期
3 黄永林;基础隔震研究与应用的回顾与前瞻[J];地震学刊;1998年04期
4 张雪亮，黄永林，杨伟林，章熙海,王优龙，田剑影,陈绪忠，张树国;重要工业设备隔震与减震装置的研究与应用[J];工程抗震;1998年01期
5 马玉宏;赵桂峰;谭平;周福霖;罗学海;;建筑设备隔震技术在我国的研究与应用现状[J];广州大学学报(自然科学版);2008年02期
6 谢礼立;翟长海;;核电工程应用隔震技术的可行性探讨[J];地震工程与工程振动;2012年01期
7 蒋美华;张磊;李华;刘成栋;李保;刘精强;;对钢丝绳隔振器的刚度和阻尼进行非线性等效的试验研究[J];军事交通学院学报;2010年06期
8 何广乾;林春哲;;日本对机械设备及建筑物隔震措施若干问题的研究近况综述[J];建筑结构;1989年02期
9 赵振东;;地震工程中隔震研究的现状与展望[J];世界地震工程;1986年04期
10 吴兵,冯沛芸;中国隔震技术浅析[J];深圳大学学报;2003年02期
本文编号：2348585
本文链接：https://www.wllwen.com/guanlilunwen/chengjian/2348585.html
