Substructuring methods are a very common and efficient way to solve complex vibroacoustic problems. The Condensed Transfer Function (CTF) approach is substructuring method based on the concept of subsystem condensed transfer functions (corresponding admittances or impedances) that allows assembling acoustical mechanical subsystems coupled along lines surfaces. For certain practical applications...

Excessive noise generated by roller coasters during operation is a significant issue for amusement parks located near residential and business districts. Previous work showed that filling the rails with sand and pea gravel can provide noise reduction levels of up to 10 and 15 decibels. However, using damping materials may require additional support structures to accommodate the weight increase ...