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Extreme load determining method considering multi-span instability of the longitudinal keel caused by lateral load action

A lateral load and ultimate load technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as high requirements, large modeling and calculation time, etc.

Active Publication Date: 2017-07-11
708TH RES INST OF CSSC
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Problems solved by technology

However, the requirements for computer hardware and software operators are relatively high, and it takes a lot of modeling and calculation time

Method used

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  • Extreme load determining method considering multi-span instability of the longitudinal keel caused by lateral load action
  • Extreme load determining method considering multi-span instability of the longitudinal keel caused by lateral load action
  • Extreme load determining method considering multi-span instability of the longitudinal keel caused by lateral load action

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0051] In a preferred embodiment, as figure 1 As shown, a method for determining the limit swimming of longitudinal multi-span instability considering side load is proposed, which is suitable for determining the limit load of hull grillage considering side load.

[0052] Determining methods can include:

[0053] Step S1, establishing a calculation model for the lateral displacement of the plate frame under the action of the lateral load;

[0054] Step S2, using the beam as the elastic support of the longitudinal frame, according to the simple frame theory of "Ship Structural Mechanics", calculate the deformation of the frame under the action of lateral load, so as to determine the lateral displacement of the longitudinal frame support;

[0055] Step S2, deriving the formula for the additional bending moment of the longitudinal bone caused by the late...

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Abstract

The invention relates to the field of design of ship structure, and provides an extreme load determining method considering multi-span instability of the longitudinal keel caused by lateral load action. The method comprises the following steps of using the lateral movement of a transverse beam or a rib plate caused by whole deformation of a plate frame as an initial defect, introducing into a calculating model of bending and flexibility of single-span longitudinal keel, and establishing a calculation model of extreme load of the multi-span instability of the longitudinal keel which simultaneously endures longitudinal axial force and lateral pressure; solving a differential equation, so as to obtain a longitudinal keel additional eccentric center caused by lateral movement of the transverse beam; giving a calculation formula of the extreme load of the multi-span instability of the longitudinal keel enduring the lateral pressure action. By adopting the technical scheme, the method has the advantages that the influence rule of the extreme load of the multi-span instability of the longitudinal keel girder column of a ship under the action of lateral load is disclosed, so as to guide the design of the extreme load of the plate frame.

Description

technical field [0001] The invention relates to the field of ship structure design, in particular to a method for determining the ultimate load of longitudinal multi-span instability in consideration of lateral load. Background technique [0002] The stiffened plate is the most basic structural unit of the ship structure and the basis of the ultimate load analysis of the hull girder. At present, the calculation methods for the ultimate load of stiffened plates adopted in the industry mainly include theoretical method and finite element method. Above the span longitudinal, either the influence of lateral load is not considered, or although the lateral load is considered, only the deformation of the single-span longitudinal is considered, and the influence of the overall deformation of the plate frame on the ultimate load is not considered. That is to say, the multi-span instability of longitudinals caused by lateral pressure cannot be considered, so the influence of lateral ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F2111/10
Inventor 贺远松吴剑国伍友军朱汉波
Owner 708TH RES INST OF CSSC
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