A model design method for combined bending and twisting ultimate strength test of small waterplane area catamaran

Abstract

The invention provides an ultimate strength test model design method of a small-waterplane-area twin-hull ship under combined action of bending and torsion and belongs to the technical field of ship structural engineering. The ultimate strength test model design method of the small-waterplane-area twin-hull ship under the combined action of bending and torsion comprises the following steps: 1) carrying out structure simplified design of a test model; 2) carrying out similar design of the test model; and 3) carrying out design of transverse bending load and longitudinal torsion load loading structures. The method provides the test model meeting the ultimate strength test of the small-waterplane-area twin-hull ship under the combined action of bending and torsion, and meanwhile, provides thetransverse bending load and longitudinal torsion load loading structures, thereby realizing effective application of the load, providing basis for structural distortion and collapse characteristic study of the small-waterplane-area twin-hull ship under the combined action of bending and torsion, guiding safety design of the ship structure and facilitating development of the ship industry.

Description

technical field [0001] The invention relates to the technical field of ship structure engineering, in particular to a design method for a small waterplane area catamaran combined bending-torsion ultimate strength test model. Background technique [0002] The small waterplane area catamaran is a short and wide ship with a double hull and wide deck structure. Because its hull structure, wave hydrodynamic response and ship stress state are more complicated than conventional monohull ships, its structural strength problem It is also different from monohulls. And for the small waterplane area catamaran, its hull shape is narrow and long, and the lateral area is relatively large, so the lateral wave induced load (transverse bending moment, horizontal shear force) is relatively large; in addition, the small waterplane area double When one side of the hull comes out of the water in oblique waves, it will cause a large longitudinal torque, so the small waterplane area catamaran will...

AI Technical Summary

Problems solved by technology

However, since the small waterplane area catamaran is a new type of ship, there are not many built in the world, and its ultimate strength test is rarely carried out. Therefore, the test model that can realize the simultaneous loading of transverse bending load and longitudinal torsional load Existence has caused great limitations to the study of structural deformation and collapse characteristics of this ship type under the joint action of bending and torsion, which is not conducive to the development of the shipbuilding industry

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