ELIMINATION OF MAIN STEAM BOILER TUBE FAILURES CAUSED BY EXCESSIVE VIBRATION ON AFS 1 CLASS SURFACE SHIPS

This paper describes corrective action taken on USS MARS in the AFTS 1 Class to eliminate main steam boiler tube fatigue failures caused by resonant vibration conditions. The failures resulted from violent "harpstring-like" bending vibration of the approximately 4-foot long, one-inch O.D. boiler tubes excited by propeller blade rate hull vibration. Stiffening bars, 5/8-inch square, were installed between the boiler tube rows to raise tube bending vibration natural frequencies beyond the operating range of propeller blade rate excitation. Post-alteration underway tests on MARS showed that stiffening reduced tube vibration to acceptable levels. Causes and effects of ship's hull, machinery, and equipment vibration are discussed, together with recommended design changes and administrative action to control ship vibration.

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• Corporate Authors:

  American Society of Naval Engineers

  Suite 507, 1012 14th Street, NW
  Washington, DC  United States  20005
• Authors:
  • Stogoski, D B
• Publication Date: 0

Media Info

• Features: References;
• Pagination: p. 33-40
• Serial:
  • Naval Engineers Journal
  • Volume: 87
  • Issue Number: 6
  • ISSN: 0028-1425

Subject/Index Terms

• TRT Terms: Boilers; Excitation; Hulls; Propellers; Vibration
• Old TRIS Terms: Boiler tube failure; Boiler vibration; Hull propeller interaction; Hull vibration; Propeller excitation
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00135383
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jul 13 1976 12:00AM