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A method and a device for obtaining the elastic-plastic elephant foot buckling critical load of a storage tank

A critical load, elastic-plastic technology, used in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as result error, and achieve the effect of high simulation authenticity and accurate calculation results.

Active Publication Date: 2019-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] An object of the embodiments of the present invention is to solve the problem that the critical stress of elastic-plastic buckling is calculated by using the elastic buckling theory and simplified finite element model in the prior art, which leads to large errors in the calculated results

Method used

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  • A method and a device for obtaining the elastic-plastic elephant foot buckling critical load of a storage tank
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  • A method and a device for obtaining the elastic-plastic elephant foot buckling critical load of a storage tank

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Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] figure 1 It shows a schematic flow chart of a method for obtaining the elastic-plastic elephant foot buckling critical load of a storage tank provided by an embodiment of the present invention, see figure 1 , the method can be implemented by a processor, and specifically includes the following steps:

[0050] 110. Obtain the structur...

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Abstract

The embodiment of the invention discloses a method and a device for obtaining the elastic-plastic elephant foot buckling critical load of a storage tank. The method comprises the following steps of: obtaining structural parameters of a storage tank, a storage tank accessory and a foundation; according to the geometrical structure and the stress-strain relationship of the material, establishing thefinite element model; setting a load and a maximum circumferential stress of the tank wall for the finite element full model, and setting a preset boundary condition for the finite element full model; taking the axial compression load data as the input variable of the finite element model, analyzing the elastic-plastic elephant buckling process of the tank, and obtaining the corresponding changedata between the axial compression stress and the deformation of the tank wall; obtaining the elastic-plastic elephant buckling critical load of the storage tank according to the corresponding changerelationship. The embodiment of the invention establishes a full finite element model, sets attribute data and other restrictive conditions of the storage tank, and takes axial pressure load data as input of the model to simulate and analyze the critical load that causes the tank wall of the storage tank to enter the elastic-plastic elephant foot buckling, which has the advantages of high simulation truthfulness and accurate calculation result.

Description

technical field [0001] The embodiments of the present invention relate to the field of petrochemical technology, and in particular to a method and device for obtaining the elastic-plastic elephant foot buckling critical load of a storage tank. Background technique [0002] Elephant foot buckling is mainly the local buckling damage caused by the longitudinal compressive stress of the tank wall exceeding the critical stress. Due to the small height-to-diameter ratio of large non-anchored oil tanks, which belong to short cylindrical shell structures, elephant foot buckling is a typical failure mode of such tanks under earthquake action. Elephant foot buckling occurs when the axial compressive stress of the tank exceeds the critical buckling stress and the hoop stress approaches the buckling limit of the material. It is the convex expansion deformation of the tank wall caused by the joint action of hoop tensile stress and axial compressive stress. This plastic deformation mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/17G06F2119/06
Inventor 石磊王晓霖王勇李明奚旺吕高峰
Owner CHINA PETROLEUM & CHEM CORP
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