摘要
选取某1000 MW级燃煤电厂联合布置弹簧基础结构为研究对象,建立包括基础结构及主厂房结构的有限元模型;然后在有限元模型的基础上,对联合布置汽机基础结构进行基于大质量法的地震时程分析。根据分析结果,基于有限元软件ANSYS提供的优化算法,以基础柱尺寸、位置为设计变量,汽机轴承中心高度的节点处地震响应加速度为目标函数,对汽机基础及其主厂房结构进行优化设计。在各类设计变量条件下,优化设计方案使目标函数值均有显著减少,优化结构能有效提高结构的抗震性能。文章采用的算法突破了业内对于该类型结构只进行多方案对比择优的传统,并为其提供了新的优化思路。
The combined layout spring foundation structure of a 1000 MW coal-fired power plant was selected as the research object,and a finite element model including the foundation structure and the main power house structure was established.Then the seismic time history analysis was carried out on the combined layout type spring foundation structure with the large mass method.According to the analysis results,the optimization algorithm provided by the finite element software ANSYS was adopted in this paper.Taking the size and position of the foundation column as design variables and the seismic response acceleration at the node of turbine bearing center as the objective function,the seismic design of the turbine foundation and the main powerhouse structure were optimized.After optimization,the value of objective function was significantly reduced under varying design variables and the optimization structure can effectively improve the structural seismic performance.The algorithm proposed in this paper breaks through the tradition of only comparing a few solutions for this type of structure,and provides a new idea of optimization.
作者
陈伊军
黄君
吴宇
黄立新
CHEN Yijun;HUANG Jun;WU Yu;HUANG Lixin(School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, Guangxi, China;Key Laboratory of Engineering Disaster Prevention and Structural Safety of the Ministry of Education, Guangxi University, Nanning 530004, Guangxi, China)
出处
《地震工程学报》
CSCD
北大核心
2022年第1期119-127,共9页
China Earthquake Engineering Journal
基金
国家自然科学基金(11262002)。
关键词
ANSYS软件
联合布置弹簧基础结构
地震时程分析
优化设计
ANSYS software
combined layout type spring foundation structure
seismic time-history analysis
optimal design
