A Calculation Method of Combined Bending-torsion Ultimate Strength of Small Waterplane Area Catamaran
A small waterplane area twin-hull, ultimate strength technology, applied in the direction of design optimization/simulation, geometric CAD, special data processing applications, etc., can solve the joint bending and torsional ultimate strength of double-hull ships without small waterplane area, and the number is small And other issues
Active Publication Date: 2022-04-01
708TH RES INST OF CSSC
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However, there are not many small waterplane area catamarans at home and abroad at present, and there is no calculation method for the combined bending and torsion ultimate strength of small waterplane area catamarans in the existing design codes and literature
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0026] figure 1 It is a cross-sectional schematic diagram of a small waterplane area catamaran of the present invention; figure 2 is a boundary condition for calculating the combined ultimate strength of a small waterplane area catamaran in bending and torsion; image 3 It is a schematic diagram of lateral load applied outward in a calculation method of combined bending and torsion ultimate strength of a small waterplane area catamaran according to the present invention; Figure 4 It is a schematic diagram of the application of lateral load inward in the calculation method of combined bending and torsion ultimate strength of a small waterplane area catamaran according to the present invention; Figure 5 It is a schematic diagram of triangular distributed transverse load of a calculation metho...
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The invention discloses a method for calculating the combined bending and torsion ultimate strength of a small waterplane area catamaran, which includes: Step 1. Aiming at the hull structure characteristics of the small waterplane area catamaran, a full calculation method suitable for the calculation of the combined bending and torsion ultimate strength is established. The 3D finite element model of the ship rationally simplifies the structural components of different parts; Step 2: Define the nonlinear properties of the hull material; Step 3: Define the boundary conditions for calculating the joint ultimate strength of bending and torsion; Step 4: Load the combined ultimate strength of bending and torsion in the 3D ship Finite element model and calculate loads. The invention provides a method for calculating the ultimate strength of a small waterplane area catamaran under the joint action of bending and torsion.
Description
technical field [0001] The invention relates to the technical field of ship structural engineering, in particular to the technical field of a calculation method for the bending-torsion combined ultimate strength of a small waterplane area catamaran. Background technique [0002] A small waterplane area catamaran generally includes five parts: a submerged body, a pillar body, a cap, a connecting bridge and a superstructure. The small waterplane area catamaran is a typical short and wide ship type with a double hull and wide deck structure. The hull structure, wave hydrodynamic response and ship stress state of this ship type are more complicated than those of conventional monohull ships, resulting in its structural strength. The problem is very different from that of a monohull. For conventional monohull ships, the structural strength mainly refers to the overall longitudinal strength, and the longitudinal load (bending moment, shear force) caused by waves is the basis for t...
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IPC IPC(8): G06F30/23G06F30/15
CPCG06F30/23G06F30/15
Inventor 叶帆王慧彩王显正刘见华李江涛
Owner 708TH RES INST OF CSSC