Dynamic Analysis

摘要

After 35 years, I still find dynamic analysis to be a 'buzz,' if you will excuse the pun. There are so many uncertainties in dynamic analysis, dependent on the way that the mass distribution, the stiffness distribution, loading forms and constraint forms all interact. The results of an analysis are often a surprise, and always need checking. The natural frequencies of any structure are special frequency values where the interchange between kinetic energy and stored energy occurs most readily. A simple suspended mass on a spring has a single natural frequency, say 134 Hertz (Hz). Hertz units are in cycles per second.