Experience-Based Lecture of Vibration Engineering Using Dual Scale Experiments: Feeling the Free Vibration of 5,600-ton Seismic Building and Controlling the Vibration of Scale-Down Experimental Model

摘要

This Innovative Practice Full Paper presents an experience-based lecture style for vibration engineering. In the proposed style, experiments of the free vibration using a seismic building and advanced vibration control using an effective device are provided in combination. In the first trial of this lecture style in 2015, two hundreds of second-year students felt the free vibration of the five-story building with a weight of 5,600 ton inside the building and witnessed the mechanism of the isolation layer. To follow the demonstration experimentally, we have built an experimental system. The device is composed of a vibration component corresponding to a building and a cart with a handle corresponding to the ground. They are connected via a linear actuator which can exert one-dimensional force to the vibration component as a function of the input voltage. Students oscillate the cart and observe the motion of the vibration component. In addition, the system has virtual reality cameras to attract students' interest. The lecture was conducted in 2017. A questionnaire showed that 100% of students valued the lecture as useful. Since 90% of students valued that providing large-scale demonstration and this lecture in combination as useful, the proposed style achieved a certain result.