MECHANISM AND FEATURES OF FREQUENCY SPECTRUM OF PROPELLER SINGING

A simplified physical model of the sound field radiated by rotating propeller blades which produce singing is given for both the full-scale propeller and model propeller tested in a water tunnel. The theoretical analysis and experimental results indicate that the signal of propeller singing received at field point out of the direction of the propeller shaft is a superposition of a series of sound waves with frequencies fn = fs + n OMEGA / 2 pi (fs - vibration frequency of rotating propeller blades), while in the direction of the propeller shaft is a tone with single frequency f. The features of frequency spectrum are verified for both the full scale propeller and the model propeller.

• Supplemental Notes:
  • Shipbuilding of China, n 123, Oct 1993, p 16 [7 p, 4 ref, 4 fig]
• Authors:
  • Peng, L
• Publication Date: 1993

Language

• Chinese

Subject/Index Terms

• TRT Terms: Cavitation noise; Flow; Power spectra; Sound; Sound; Vibration
• Old TRIS Terms: Flow induced vibration
• Subject Areas: Environment; Marine Transportation;

Filing Info

• Accession Number: 00716109
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Feb 28 1996 12:00AM