船体構造に対する衝撃加振試験法

概要

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Impulse testing is widely used to obtain the vibratory characteristics of the automobiles and the other small machinaries on account of its simplicity and handiness. On the application of the technique to such a gigantic structure as ship, however, several problems should be overcome to get the good results. The followings are considered to be the main problems. 1. How to excite a large structure effectively. 2. How to identify the vibratory characteristics from weak signals of measurement. In this paper, the description of special hammer for the generation of impulse is made for the solution of the first problem, and a method of averaging in the time domain is proposed to get low noise signals. Comparison of the results by the present method with those by the conventional sinusoidal excitation is made for two ships and a good agreement is confirmed.
社団法人日本船舶海洋工学会の論文
1983-08-24