不同连接刚度二次设备柜振动台试验与数值模拟研究
Shaking table test and numerical simulation study of secondary equipment cabinet with different connection stiffness
程智余 1张天忠 2胡广润 3王开库 3何宇辰 4冯玉龙 5于飞 5曾志豪5
作者信息
- 1. 国网安徽省电力有限公司,安徽 合肥 230022
- 2. 国网安徽省电力有限公司建设分公司,安徽 合肥 230071
- 3. 安徽送变电工程有限公司,安徽 合肥 230071
- 4. 国网安徽省电力有限公司经济技术研究院,安徽 合肥 230022
- 5. 合肥工业大学土木与水利工程学院,安徽 合肥 230009
- 折叠
摘要
为了提高变电站二次设备柜抗震性能和韧性,探究了二次设备柜底部连接刚度对其动力响应的影响,对6个不同连接形式的二次设备柜进行了振动台试验.采用ABAQUS软件对试验进行了数值模拟,并对底部连接刚度进行了参数化分析.结果表明:底部螺丝数量显著影响设备柜基本频率,螺丝数量增加2倍后,设备柜的基本频率增大了61.8%;试验后拼柜基本频率最大下降了17.2%,在所有设备柜中下降幅度最大,应加强拼柜的底部连接刚度;地震作用下设备柜发生强度破坏的可能性较小,随着底部螺丝竖向刚度的增大,设备柜的峰值加速度先增大后减小,设备柜顶部峰值加速度增大了16.6%～74.2%;随着底部螺丝水平刚度的增大,设备柜顶部峰值加速度减小了3.28%～29.6%.研究可为变电站二次设备柜的抗震设计以及地震韧性变电站的建造提供重要参考.
Abstract
In order to improve the seismic performance and resilience of substation's secondary equipment cabinets,the influence of the bottom connection stiffness of the secondary equipment cabinets(SEC)on its dynamic response was investigated.Shaking table test was carried out on six SECs with different connection forms,numerical simulation of the tests was carried out using ABAQUS software,and parametric analysis of the bottom connection stiffness was carried out.The results show that the number of screws at the bottom significantly affects the basic frequency of the equipment cabinet,and the basic frequency of the equipment cabinet increased 61.8%after the number of screws increased two times.After the test,the basic frequency of the spliced equipment cabinet decreased by 17.2%,which was the largest decrease among all the equipment cabinets,and the bottom connection stiffness of the spliced equipment cabinet should be strengthened.The possibility of strength damage of the equipment cabinet under seismic action was small,and more attention should be paid to the effect of the acceleration response on the working performance of the equipment.As the vertical stiffness of the bottom screw increased,the peak acceleration of the equipment cabinet first increased and then decreased.Peak acceleration at the top of the equipment cabinet increased by 16.6%to 74.2%.As the horizontal stiffness of the bottom screw increased,the peak acceleration of the equipment cabinets decreased.Peak acceleration at the top of the equipment cabinet decreased by 3.28%～29.6%.This study can provide important reference for the seismic design of substation's secondary equipment cabinets and the construction of seismic resilient substations.
关键词
金属结构/二次设备柜/连接刚度/振动台试验/动力响应Key words
metal structure/secondary equipment cabinet/connection stiffness/shaking table test/dynamic response引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据