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Computing method for accurately analyzing internal pressure strength of grid reinforced cylindrical shell

A calculation method and technology for cylindrical shells, applied in calculations, special data processing applications, instruments, etc., can solve the problems of lack of calculation methods for the structural strength of grid-reinforced cylindrical shells, and achieve structural weight reduction, accurate and rapid design, and improved bearing capacity effect of ability

Active Publication Date: 2017-05-31
DALIAN UNIV OF TECH +1
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Problems solved by technology

[0003] Because the method is general and can accurately consider the influence of tension-bending coupling items, the stability calculation method of orthotropic cylindrical shell based on laminated shell theory is generally used in engineering to design the axial and external pressure stability of grid-reinforced shells. , the theory and practice have proved that this method has high accuracy, but there is no corresponding method for calculating the strength of grid-stiffened cylindrical shell structures under internal pressure loads

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  • Computing method for accurately analyzing internal pressure strength of grid reinforced cylindrical shell
  • Computing method for accurately analyzing internal pressure strength of grid reinforced cylindrical shell
  • Computing method for accurately analyzing internal pressure strength of grid reinforced cylindrical shell

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[0050] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0051] Assuming that the structure is a uniform mesh reinforced cylindrical shell, the input conditions are obtained, including the following:

[0052] 1) The radius of the grid-reinforced shell is R, and it is composed of ribs and skins with m kinds of angles, and the angles of ribs are 0°, 90°, ±θ or their combination;

[0053] 2) Rib parameters are wall thickness H, skin thicknes...

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Abstract

The invention provides a computing method for accurately analyzing the internal pressure strength of a grid reinforced cylindrical shell. The computing method comprises the following steps: 1) performing 'flattening' treatment on rigidity of ribs in the grid reinforced cylindrical shell; 2) calculating the tension and compression stiffness of the ribs according to the laminated shell theory; 3) obtaining a rib / skin mass ratio and longitudinal and horizontal equivalent thicknesses of the grid reinforced cylindrical sell according to a tension and compression stiffness computation formula; and 4) computing the internal pressure strength of the grid reinforced cylindrical sell. The computing method provided by the invention is suitable for all kinds of grid form structures, and is used for designing and computing the internal pressure strength under the joint load action of pure internal pressure, axial pressure, bending moment and internal pressure, thereby obtaining ultimate bearing capacity; and the method is more intuitive and clear as well as simple and convenient, and is favorable for improving the bearing capacity of a grid reinforced structure, reducing the weight of the structure and realizing accurate and fast design of strength.

Description

technical field [0001] The invention provides a calculation method for accurate analysis of the internal pressure strength of a grid-reinforced cylindrical shell, which is applied to the accurate and rapid design calculation of the internal pressure strength of various grid-reinforced cylindrical shell structures. Background technique [0002] Compared with the bare cylinder shell, due to its strong designability and high load-bearing efficiency, the structural form of the grid-reinforced cylindrical shell is widely used in various thin-walled structures bearing axial compression. In addition to axial compressive strength and stability, internal compressive strength is often one of the main design conditions for lattice-stiffened cylindrical shells. At present, there are mainly two methods for calculating the internal compressive strength of grid-stiffened cylindrical shells: engineering simplified calculation method and finite element analysis method. In the traditional en...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 王博郝鹏徐卫秀曾杜娟袁彪杨帆鄢东洋乐晨郑卫东
Owner DALIAN UNIV OF TECH
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