Experimental Verification of Two-Step Design for Reduction of Noise and Vibration

Abstract

The authors have proposed the Two-Step structure design method for noise and vibration reduction based on vibration energy propagation analysis, which utilizes both analytical SEA and structural intensity analysis. In this paper, the Two-Step design method was applied successfully for the vibration reduction of a T-shaped plate structure and each design step was verified consistently by both FEM and hammering test. Especially, it was confirmed that a newly-devised FRF test method with damping sheet attached on the test-specimen can simulate a structure with heavy damping ratio of 0.1 and show the good agreement with the FRF calculated by FEM.