強制振動実験における解析法へのアプローチ (その 1) : 一質点系理論による共振曲線の回帰分析

抄録

In resent years, vibration tests of building structures using eccentric mass vibration generators became increasingly important because the design of building structures, such as tall buildings or special buildings, require the high level of vibrational analysis. However, the software, which is the technique of data analysis in vibration tests has made less progress compared with the hardwar, which is the improvement of vibration generators. The purpose of this paper is two fold. 1) To establish a method of automatically correcting amplitudes that include the vibrational characteristics of vibrographs. (See Eqs. (1) to (4)) 2) To find a method of adapting these correcting data to resonance curves using the theory of one-degree system. (See Eqs. (28) to (30)) This method is applied to some example data gathered in actual vibration tests. By this method, three parameters (natural frequency, damping coefficient and equivalent mass) can be automatically obtained and vibrational test data can be consequently regressed to the resonance curve in accordance with one-degree system. Application of this method to the case of higher modes, however, will require additional consideration of modal interferences with each other.