Generalized modes in time-domain seakeeping calculations
conference paper
The concept of "generalized modes" is to describe all degrees of freedom by mode shapes and not using any predefined shape, like rigid body modes. Generalized modes in seakeeping computations allow one to calculate the response of a single ship, springing, whipping, multibody interaction, etc., using a uniform approach. The generalized modes have already been used for frequency-domain seakeeping calculations by various authors. This article extents the generalized modes methodology to be used for time-domain seakeeping computations, which accounts for large-amplitude motions of the rigid-body modes. The time domain can be desirable for seakeeping computations because it is easy to include nonlinear load components and to compute transient response, like slamming and whipping. Results of multibody interaction, two barges connected by a hinge, whipping response of a ferry resulting from slamming loads, and the response of a flexible barge are presented to illustrate the theory.
TNO Identifier
480149
ISSN
00811661
ISBN
9780939773886
Source title
SNAME 2012 Annual Meeting and Expo and Ship Production Symposium: Where Industry and Technology Meet, 24 October 2012 through 26 October 2012, Providence, RI
Pages
228-246
Files
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