STUDY ON DEFLECTION OF ENGINE ROOM DOUBLE BOTTOM

The increased size of ships and accompanying enlarged output of propulsive plants have put forth many technical problems to shipbuilders. One of them is shaft alignment and deflection of engine room double bottom on which the shaft is installed. The deflection of engine room double bottom affects very much the shaft alignment and it is reported that the deflection has sometimes caused troubles. In this paper the authors clarify the components of the deflection of engine room double bottom by calculations and measurements, and propose how to design the engine room including double bottom structures, making allowance for deflection from the viewpoint of shaft alignment. The deflection of engine room double bottom consists of shear and bending deflection of double bottom, deformation of transverse web frame and shear bending deflection of hull girder. Among the above, deformation of web frame and shear deflection of hull girder are important, and reinforcement of the web frame is considered to be effective to keep the deflection within the allowable limits.

• Supplemental Notes:
  • In Japanese-no charge. In English-reg price.
• Corporate Authors:

  Ishikawajima-Harima Heavy Industries Co., Ltd.

  2-16, Toyosu 3 Chome, Koto-Ku
  Tokyo 135,   Japan 
• Authors:
  • NAKASHIMA, S
  • Mano, M
• Publication Date: 1971-9

Media Info

• Features: Figures; Tables;
• Pagination: p. 394-400
• Serial:
  • Ishikawajima-Harima Engineering Review
  • Volume: 11 N
  • Issue Number: 5
  • Publisher: Ishikawajima-Harima Heavy Industries Co., Ltd.

Subject/Index Terms

• TRT Terms: Alignment; Deflection; Deformation; Double bottoms; Hulls; Shafts (Machinery); Vehicle design
• Uncontrolled Terms: Ship design
• Old TRIS Terms: Deformation stress; Double bottom construction; Hull deflection; Shaft alignment
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00034444
• Record Type: Publication
• Source Agency: Ishikawajima-Harima Heavy Industries Co., Ltd.
• Files: TRIS
• Created Date: Sep 27 1973 12:00AM