RESEARCH ON THE DESIGN AND VIBRATION ISOLATION PERFORMANCE OF A NEW LIGHTWEIGHT DAMPING BASE

In order to achieve the purpose of reducing hull vibration and radiated noise, a new lightweight damping base has been designed by using phononic glass and arc connection structure in this paper. After the above procedures of design and preparation, we used the vibration level drop and vibration isolation test method to characterize and test the performance of vibration isolation for the damping base. The results show that the damping base has a significant vibration isolation effect in the frequency range of 20\sim10 000 Hz, and compared with the steel base with the same size, the total vibration drop can reach 12.93 dB. Finally, a clear conclusion is given that the lightweight damping base designed in this paper has the characteristics of high strength, high damping and wide frequency vibration isolation, so it has a wide range of potential applications in vibration isolation of equipment for marine machinery, vibration and noise reduction of vehicles, etc.