Generalized modes in time-domain seakeeping calculations

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...

Generalized modes in time-domain seakeeping calculations

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...

Global hydroelastic ship response comparison of numerical model and WILS model tests

It is nowadays well recognized that the hydroelastic ship response might be an important part of the overall ship structural response. We usually talk about two phenomena: namely springing and whipping, even if sometimes it is not trivial to distinguish between the two of them. Usually, springing is defined as a continuous resonant wave-induced...

Validation of the global hydroelastic model for springing & whipping of ships

Hydroelastic response of the ship can represent an important part of the overall structural response. This is true both for the extreme ship structural response as well as for the fatigue loads of some structural details. Several full scale monitoring campaigns on the container ships clearly show an important high frequency contribution coming...

Fully coupled seakeeping, slamming and whipping calculations

Local hydro-structure interactions due to slamming

It is fair to say that the general seakeeping problem of ship advancing with arbitrary forward speed in rough waves is still a challenge and no fully satisfactory numerical model exists up to now. Indeed physics involved in this problem is extremely complex and includes many different physical phenomena which can not be handled by a single...

3DFEM-3DBEM model for springing and whipping analysis of ships

The paper deals with the modeling of the wave induced ship structural vibrations. The presented method is fully integrated in both the linear frequency domain and non-linear time domain seakeeping calculations. Due to the transient non-linear nature of slamming loading, the corresponding whipping response is calculated in the time domain only,...