安装粘滞阻尼器的石化裂解炉抗震计算分析

Seismic analysis and standardized design of cracking furnace with viscous damper

基于现代结构健康检测(SHM)系统方法,将阻尼减震器用于石化裂解炉结构进行设计,以某石化工程中的大型乙烯裂解炉为对象,考虑对流段模块与框架不同连接,利用ABAQUS有限元软件对其进行自振特性分析和7度罕遇地震作用下动力响应分析。计算结果表明,在地震作用下对流段模块与框架之间采用粘滞阻尼减震器能有效提高裂解炉的抗震性能,在目前工程设计规范缺乏明确规定下,建议采用时程分析法进行结构的地震响应分析。

Based on modern Structural Health Monitor( SHM) system method,damping shock absorbers are applied to the design of ethylene cracking furnace. Taking a large cracking furnace in petrochemical engineering as the object,the natural vibration characteristics and seismic response of cracking furnace subjected to the rarely occurred 7. 0-magnitude earthquake have been analyzed by using the finite element software ABAQUS. The results indicate that the dynamic response behavior of the cracking furnace effected significantly by the connection types between the tower and frame during the earthquake. The seismic behavior of the cracking furnace can be improved effectively by setting the fluid viscous damper between convection module and frame. Cause to lack of the clear design rule for the current engineering standard,the time-history analysis method is suggested for seismic response analysis.