VIBRATION MEASUREMENTS ON THREE TANKERS: SUMMARY OF RESULTS

Vibration measurements have been accomplished on three tankers, (130,000 tdw-228,000 tdw). Not only frequencies have been registered but also amplitudes. Some investigations concerning thrust bearing, steering gear flat and OT bulkhead are included but the main interest is shown the bottomframes. Good agreement between calculated and measured basic frequencies have been obtained while the discrepancies are larger for the higher mode frequences. The amplitudes, which had been a controversial question were found to be small. A distinct tendency for the amplitude to decrease with increased distance from the engine room was observed. However, in one case the amplitude increased again towards tank 1. This may have been caused by local effects.

• Corporate Authors:

  Swedish Ship Research Foundation

  Fack
  40270 Goteborg 8,   Sweden 
• Authors:
  • Eftring, N
• Publication Date: 1970

Media Info

• Features: References;
• Pagination: 22 p.
• Serial:
  • Issue Number: 69

Subject/Index Terms

• TRT Terms: Engines; Hulls; Measurement; Vibration
• Old TRIS Terms: Engine vibration; Hull response; Hull vibration; Vibration measurement
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00024801
• Record Type: Publication
• Source Agency: Ship Structure Committee
• Files: TRIS
• Created Date: Jan 21 1972 12:00AM