摘要
某钢结构栈桥振动表现为间歇性,其间隔时间无明显规律,短到几秒,长则几十秒发生一次剧烈振动。通过振动测试和动力特性分析确定间歇性振动是由水平构件竖向刚度偏小、共振和"拍现象"三方面原因综合导致的;通过动力计算分析,给出了合理有效的振动治理方案。
The vibration of a steel bridge was intermittent,the interval has no obvious regularity.A violent vibration may occurs in several seconds or tens of seconds.Dynamic characteristics analysis through vibration test and the results showed that the occurance intermitten vibration was due to the weak stiffness,the resonance,and the beat phenomenon.A reasonable and effective vibration control scheme was proposed by the dynamic analysis.
出处
《钢结构》
北大核心
2017年第10期90-93,共4页
Steel Construction
基金
国家重点研发计划课题(2016YFC0701302)
关键词
间歇性
振动
拍现象
intermittent
vibration
beat phenomenon
