Hydroelasticity test ship model adopting U-shaped keel beam and design method thereof

Abstract

The invention discloses a hydroelasticity test ship model adopting a U-shaped keel beam and a design method thereof. The hydroelasticity test ship model comprises a ship hull system and a U-shaped keel beam, wherein the ship hull system comprises segmented ship hulls, a base and ballast blocks; the outer contours of the segmented ship hulls are obtained by scaling a real ship profile; the ship hull is broken at a load measurement section to form a plurality of segmented ship hulls; and gaps between the adjacent segmented ship hulls are connected in a sealed mode through silica gel strips; thebase is installed in the middle of the interior of each segmented ship hull; the ballast block is placed in the ship hull; the U-shaped keel beam is longitudinally and continuously arranged from the bow to the stern and is rigidly and fixedly connected with the base on the segmented ship shells; the U-shaped keel beam comprises a horizontal bottom plate, a vertical web plate and a horizontal wingplate; the width of the inner wall of the horizontal bottom plate, the height of the vertical web plate and the thickness of the horizontal wing plate are kept unchanged in the length direction of theship, and the vertical bending rigidity, the horizontal bending rigidity and the torsional rigidity of the U-shaped keel beam in the segmented ship shells are similar to those of a real ship. The invention relates to the technical field of ship tests.

Description

technical field [0001] The invention relates to the technical field of ship testing, in particular to a hydroelastic test ship model using a U-shaped keel beam and a design method thereof. Background technique [0002] Ships are sailing or mooring at sea during their entire service life. There are waves on the sea surface for more than 70% of the time, and ships are under the action of waves most of the time. Waves can not only induce the six-degree-of-freedom swaying motion of the ship, but also induce the load response of the hull structure. Wave load is the most important external load among all external environmental loads (including wind, wave, current, internal wave and other environmental loads) acting on the ship structure. Accurate prediction of ship wave loads is the primary task in evaluating safety issues such as yielding, buckling and fatigue strength of hull structures. Shipwreck accidents caused by the failure of the hull structure caused by wave loads occur...

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Problems solved by technology

On the other hand, the use of rectangular cross-section keel beams can only ensure that the natural frequency of the vertical bending vibration of the ship model is similar to that of the real ship, and cannot ensure that the natural frequencies of the horizontal bending vibration and torsional vibration of the ship model are also similar to the real ship

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