Theoretical study on phase interference method for passive reduction of multiple excitation forces - reduction method of vibration due to rhythmic action of concert audience

摘要

This paper presents a proposal of phase interference method for reduction of multiple excitation force. Firstly, conventional vibration reduction methods are discussed, mainly on the merits of general elastic suspension methods and on their demerits of difficulties on reduction of lower frequency vibration components. Secondly, a new method of vibration reduction is presented which is effective on lower frequency vibration case. Theoretical reduction effects of it are studied and differences from conventional isolation methods are discussed. Finally, practical effects and feasibilities of the newly presented method are studied and discussed, considering of various application situations on the building vibration-proof engineering.