Yoshiya TANAKA

Research on the Application of Statistical Energy Analysis to the I-beam component.

Yasuyuki MIYAKI

The noise pollution for automotive and railway transport over steel bridges is an important issue. The steel bridges, rail tracks, or their support are mainly recognized as the noise source for Bridge-borne noise, because the vibrations excite the bridge structure and cause the amplification of noise. This type of noise exists dominant in a frequency band from 20Hz to 2kHz. The noise analysis using Finite Element Method (FEM) is restricted to frequencies below 100Hz while noise analysis using statistical energy analysis (SEA) is effective in high frequencies.
In this research, using I-beam component that is major component in a real structure, SEA and FEM was simulated. SEA parameter was tested various condition. And to validate the simulation results, an experiment to measure the sound pressure level was conducted.
Simulation and experimental results showed that sound pressure level at 63Hz and above could be predicted by statistical energy analysis for the I-beam component used in this research. And the optimal SEA parameter was discovered.