A NEW APPROACH TO THE ANALYSIS OF SPRINGING OF SHIP

The flexibility matrix method is being applied to determine the unified dynamic response of the ship in the vertical plane for the first time. In this method the ship is considered as a flexible non-uniform free-free beam. Dividing the ship into n stations, n equations are derived from structural deformation considerations by the flexibility matrix approach and another two equations from equilibrium considerations. These have been used to determine (n + 2) unknowns which include deflections at n stations and two rigid body motion terms of the rotation and the displacement. Wave forces are determined by the strip theory. Two-dimensional added mass and damping coefficients are determined by means of Lewis's form method with free surface correction. The method is capable of explaining ship's response in both low and high frequency zones. The method is relatively simple and computationally efficient. Two numerical examples are presented. Results are compared with those published for similar ships and there is a general agreement between them.

• Supplemental Notes:
  • Intl Shipbuilding Progress, v 42 n 430, July 1995, p 109 [23 p, 30 ref, 4 tab, 13 fig]
• Authors:
  • Sarkar, T
  • Mukopadhyay, M
• Publication Date: 1995

Language

• English

Subject/Index Terms

• TRT Terms: Dynamic loads; Hulls; Matrices (Mathematics); Vibration
• Uncontrolled Terms: Dynamic response
• Old TRIS Terms: Hull vibration; Springing
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00717524
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Mar 4 1996 12:00AM