Numerical Analyses and Experiments Aiming at Increasing Natural Frequencies of Box-shaped Jig Made of Resin for a Vibration Test

Abstract

In recent years, vibration durability of automobile parts become more and more important to meet weight reduction of automobile parts and complication of shape. In the vibration test, it is desirable to flexibly assemble the jig according to the shape of the part, however, this may reduce the natural frequencies. In this study, analytical and experimental result are presented on natural frequencies and their modes of box-shaped jigs made of resin for vibration test. The jig is an integral structure cut out from a resin material block. Two types of fix conditions were considered for this study. One is fixed only with bolts at the bottom, while the other is fixed with fastening parts proposed in this study to increase the natural frequencies. Analytical and experimental results on natural vibration modes of the jigs fixed under the two conditions are compared. Furthermore, the results are compared with experimental results of a jig model with the same shape composed of resin plates with bonding, witch show high rigidity of the proposed model.