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By Carlos Guedes Soares; International Conference on Marine Structures

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2007. Casualty Analysis of AFRAMAX Tankers. Journal of Engineering for the Maritime Environment, Proceedings of the Institution of Mechanical Engineers, Part M, Volume 221, pp. 47–66. A. 2010. Rules for the Classification of Ships, Part B, Vol. 2, pp. 33–35. E. & Wang, G. 2002. Fiber Optic System for Ship Hull Monitoring. 15th IEEE Optical Fiber Sensors Conference, 1, pp. 435–438. A. A. 2009. Structural health monitoring of marine composite structural joints using embedded fiber Bragg grating strain sensors.

Figure 31. 5 Tug bow FE model, typical test panel. The paper describes a hull stress monitoring system which employs temperature compensated laser based optical sensors, developed within the MOSES project. The design of two prototypes are described, one installed on a double side bulk carrier and the other on an ice class tug boat. The evaluation of hull girder bending moments along the ship length and local stresses in selected hot spots has been selected as main features for the system on the bulk carrier.

By substituting equation (4) into equation (1) and pre-multiplying by DT, the following generalized equation in terms of the principal coordinates of the structure is obtained: ap(t) + bp(t ) cp((t ) (5) Q( ) Here a, b, c denote the generalized mass, damping and stiffness matrices, respectively, and are defined as a = DTMD, b = DTCVD, c = DTKD, Q = DTP (6) It should be noted that the generalized mass, a, and stiffness, c, matrices are diagonal. ), and may be expressed as MATHEMATICAL MODEL Q(t)) Generalized equation of motion (Ap(t) Bp( ) + Cp( )) (7) (t ), where A, B and C are the generalized added mass, fluid damping, and fluid stiffness matrices, respectively, and Ξ(t) denotes the generalized external forces.

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