But as well as the applicaton of horizontal continuous casting billets , the amount of disfigurement of pierced shell inner and outer fold is increasing apparently,especially the outer fold is the very seriousone.

Acoustic attenuation performance prediction and analysis of perforated tube dissipative silencers;

The GT-POWER software is used to calculate the transmission loss of straight through perforated tube muffler and three-pass perforated tube muffler without gas flow,which are compared with experimental measurements to verify the accuracy and applicability of the software.