Loudspeakers tuned as optimal acoustic absorbers can significantly reduce damaging, low frequency, reverberant noise in a full-scale launch vehicle fairing. Irregular geometry, changing payloads, and the compliant nature of the fairing hinder effective implementation of a passively tuned loudspeaker. A method of tuning the loudspeaker dynamics in real time is required to meet the application re...

A series of wind tunnel model tests and theoretical analyses were conducted to investigate torsion excitation, response and vibration suppression of wind-excited buildings. An aeroelastic model for pure torsion vibration was developed and the aeroelastic test results were compared with those obtained by other Wind tunnel test techniques. The comparison and practice indicated that this type of m...

The car's suspension play a decisive role in car’s driving smoothness and handling exercised stability. Therefore, the research of suspension is vital important. This paper presents a simulation of Suspension Dual-mass System based on mathematical formula of the car wheel and body double quality system, and the suspension dual-mass system model which established by using the Simulink. And taken...