Research on FEM to forecast structural noise of basement;

To enhance the signal to noise ratio (SNR) of fundamental ultrasonic echo signals for ultrasonic nondestructive testing (UNDT) and ultrasonic nondestructive evaluation (UNDE), an improved technique to suppress structural noises of ultrasonic signals was presented.

The research of structural noise control is an important aspect of noise and vibration control domains.

Mathematical simulation of rotary machine structure radiant noise;

Research on Structure Radiant Noise of Rotary Machines and the Mechanism to Control It;

In order to control the ship structure-borne sound to reach the purpose of reducing vibration and noise,it is necessary to confirm the position of vibration and the transmitting way of vibration,analyze functions of each machine in the vibration system.

In the view of structure-borne sound,the wave propagation and power flow characteristics were investigated for multiple damaged beams loaded by point force.

Under the excitation of harmonic force the vibrational power flow characteristics of plate with a surface crack are investigated from the view of structure-borne sound.

Acoustic similarity is the base of scaled model tests of underwater structure noise.

Analysis and Control on Structure-borne Noise Radiated by Large Power Machines;

Based on frequency spectrum of each point, amplitude spectrum of structure-borne noise and testing results of air-borne noise, the authors analyze the vibration characters and latent faults of double-ring gear reducer, coming to the value and the cause of the noise, providing theoretical basis f.

To the high-speed ships the structure-borne noise became a serious matter for their flexible rigidity and the high- frequency excitation.