摘要
在抗爆结构中,一般采用单层隔震系统进行隔震,目前单层隔震系统的最大隔震率可以达到90%以上,但在加速度峰值很高的冲击荷载作用下,隔震后的结构响应加速度仍然很大。鉴于这种情况,本文对加入磁流变阻尼器(MRD)的双层隔震系统进行了研究。针对抗爆结构的两种典型荷载,采用改进Bouc-Wen模型和模糊控制方法,利用Matlab Simulink对双层隔震系统进行了数值模拟,计算了不同荷载作用下,不同隔震系统的加速度、位移及结构的振动剂量值(VDV)的响应,并与结构采用单层隔震系统的结果进行了对比。结果表明,与单层隔震系统相比,带有磁流变阻尼器的双层隔震系统没有太多的优越性。
One layer vibration isolation system is usually used in the shock isolation of blast-resistance structures. At the present time, the largest isolation rate can reach 90 %. However, the acceleration of the structures after isolation is still very large if the peak acceleration of ground shock is very large. In order to further increase the isolation rate, a double layer vibration isolation system with Magnetorheological fluid dampers （MRD） is investigated numerically in the paper. The double layer vibration isolation system subjected to two typical ground shocks is simulated by Matlab Simulink, based on the modified Bouc-Wen model and fuzzy logic control method. The acceleration, displacement and Vibration Dose Value（VDV） of the structure under two typical ground shocks in different vibration isolation systems are calculated and the comparison of isolation effects between the one layer vibration isolation system and double layer vibration isolation system is given. It is demonstrated that the double layer vibration isolation system with MRD is no better than the one layer vibration isolation system.
出处
《防灾减灾工程学报》
CSCD
2009年第1期27-34,共8页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(50525825
50638030)
国家科技支撑计划项目(2006BAJ13B02)资助
