A Simple Technique of Analyzing Vibration Mode Shapes by the Mass Response Method

Abstract

In this paper, a new approach to obtaining mode shapes is proposed. The method analyzes mode shapes from the variation of the natural frequencies of the structure when an additional concentrated mass is attached. Although the method is unable to acquire high accuracy, such as the experimental modal analysis method based on curve fitting, and its application is confined to flexible structure, the method is simply and quickly achieved by using the frequency data only.