Professor Weikang Jiang's home page

NSFC

Fundamentals for reconstructing broadband fan noise from turbofan(51835008)

The theories and methodologies of the source identification and the sound field reconstruction of broadband fan noise will be studied, which is the dominant sources of turbofan on aircrafts. The parametric equivalent source model of unsteady aerodynamic loading will be established, the inverse sound propagation relationship in the non-uniform flow will be constructed, and the regularization method based on the Bayes’ theory will be developed. Additionally, the transfer function from the duct...

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Research on the beam forming principles and methods of complex Pneumatic noise source(11574212)

For the needs of the analysis and control of Pneumatic noise source, studying the new beam forming principles and methods, which is used in the analysis of complex Pneumatic noise source combined by three typical sound sources including the monopole, dipole and quadrupole, as well as Pneumatic noise source from movement. First based on the measurement of microphone array, reach back to the principles of the dipole and quadrupole sound source respectively, and establish new beam forming method ...

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Research on the mechanism，modeling and reduction of vibration and underwater acoustic radiation of open-ended cylin...

The dynamic behavior of open-ended pipe driven by a hydraulic hammer will be studied in this project, and the mechanism of underwater acoustic radiation of the pile will be investigated. The influencing factors of underwater noise and its reduction way will be researched. Modeling the impact on the pile head and the soil around the pile toe, a nonlinear non-stationary dynamic model of the pile in driving will be obtained. A semi-analytical method will be used to calculate underwater so...

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