基底隔震的减振控制实验

The Control Experiments Based on Base Isolation Damping

基底隔震是隔离地震能量向上部结构的传递,属于结构被动控制技术中一种应用范围较广的振动控制技术。设计了基底隔震实验,并应用到教学实验中。实验中设计了一种滚珠隔震方法,并根据设计加工单层框架基底隔震模型,得到隔震控制系统实物。实验中,向系统输入地震波和简谐波,观察采取隔振措施前后的结构震动状态及采集的加速度时程曲线。结果显示,采取隔振措施后结构的震动明显减小;加速度时程曲线显示采取基底隔震措施后结构的加速度显著降低。

Base isolation is to isolate the ground motion which may be transferred to the upper structure. It is a passive control technology that is generally applied. In order to make the students understand the principles of base isolation and have comprehensive understanding of the significance of the base isolation,an experiment of the edge technology-based isolation is designed. It applies the research results to the teaching experiment. This experiment designs a ball isolation method. According to the characteristics of the vibration control technique,the model of vibration control system is designed. The single frame base isolation model is machined based on the design. In the experiment,the seismic wave and simple harmonic wave are inputted to the system. The vibration state of the structural and the acceleration-time curve are observed before and after the base isolation. The experimental results show that the vibration of the structure decreases obviously when it takes the base isolation measure. The acceleration-time curve shows that the acceleration of the structure decreases obviously when it takes the base isolation measure. The experiment combines theory and practice. It stimulates students＇ interest and enthusiasm for the base isolation.