抄録
This study was undertaken with intent to seeking a stabile structure in fundamental forms of experimental cast clasp production. Impact forces were served as a model force of the vibration in this study. Impulse responses on the clasps were analysed in frequency domain. In this experiment, fundamental natural mode of vibration which was displacement of each parts of cast clasps was found out.
The results were as follows: Similar magnification clasps which were three times as large as original one were effective for modal analysis.
Fundamental forms of experimental cast clasps were steady in impact forces to thickness to width ratio and the base to tip part ratio and the portion the ratio of 2 to 1.
