CALCULATION OF MOMENT OF INERTIA AND SHEAR AREA OF A SHIP CROSS-SECTION

When calculating the whipping motions of a surface ship caused by an underwater explosion, it is necessary to have a structural model of the ship in finite element form. Among the input data required for this model are the moment of inertia and shear area of the girder at specified cross-sections along the ship. If these data are unavailable, it may be necessary to compute them from the ship's plans. The general theory involved in computing them is described as is a simple computer program written to expedite the calculation. (Author)

• Corporate Authors:

  Naval Surface Weapons Center

  White Oak Laboratory
  Silver Spring, MD  United States  20910
• Authors:
  • Marshall, M L
• Publication Date: 1977-1-28

Media Info

• Pagination: 26 p.

Subject/Index Terms

• TRT Terms: Calculation; Computer programs; Cross sections; Data collection; Explosions; Finite element method; Girders; Input output models; Loss and damage; Mathematical models; Moments of inertia; Plane geometry; Shear stress; Ship motion; Ship structural components; Ships; Structural models; Technical drawings; Underwater construction; Whiplash
• Uncontrolled Terms: Computation; Damage assessment; Ship models
• Old TRIS Terms: Explosion effects; Mechanical drawings; Moment of inertia; Shear stresses; Underwater explosions
• Subject Areas: Bridges and other structures; Economics; Marine Transportation; Materials; Vehicles and Equipment;

Filing Info

• Accession Number: 00167181
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NSWC/WOL/TR-77-26
• Files: TRIS
• Created Date: Nov 23 1978 12:00AM