1차원 구조물내에서 진동 인텐시티의 계측에 대한 연구

Abstract

진동 인텐시티는 구조물내의 단위폭 단면을 흐르는 진동 에너지로서 벡터량이다. 본 연구에서는 굽힘 진동을 받는 보에 대한 진동 인텐시티의 계측 이론을 검토하였다. 일차원의 진동 인텐시티는 4점에서의 측정값으로 구할 수 있으며, 원거리장의 가정이 성립하면 2점에서의 측정값으로 구할 수 있으며, 이를 실험을 통해 확인하였다. 그리고 파동해와 진동 인텐시티와의 관계식을 정식??하여 파동해의 각 계수를 분리하여 구할 수 있는 방법을 제시하였으며, 실지 측정에서 큰 영향을 미치는 근접장의 범위를 해석 및 실험을 통해 확인하였다.

This paper investigated the theory for measuring the vibration intensity (power flow per width of cross section) in uniform beams vibrating in flexure. The intensity is obtained as a vector at measurement point. One-dimensional vibration intensity and be measured at 4 points, or 2 points on the assumption of far field. Formulation of the relation between bending waves in structures and vibration intensity makes it possible to separate the wave component by which one can get a state of the vibration field. Then, the effect of the near field, which is thought to be great in the actual measurement, is examined by computer simulation and confirmed by experiment.

This paper investigated the theory for measuring the vibration intensity (power flow per width of cross section) in uniform beams vibrating in flexure. The intensity is obtained as a vector at measurement point. One-dimensional vibration intensity and be measured at 4 points, or 2 points on the assumption of far field. Formulation of the relation between bending waves in structures and vibration intensity makes it possible to separate the wave component by which one can get a state of the vibration field. Then, the effect of the near field, which is thought to be great in the actual measurement, is examined by computer simulation and confirmed by experiment.