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Opening reinforcement method of shaft pressing reinforced cylindrical shell

A reinforced column and axial compression technology, which is applied in the fields of instrumentation, calculation, electrical digital data processing, etc., can solve problems such as optimization failure, low optimization efficiency, and low calculation efficiency

Active Publication Date: 2015-08-26
DALIAN UNIV OF TECH
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Problems solved by technology

However, the calculation efficiency of the fine finite element model is often extremely low, which brings a large calculation cost to the analysis and optimization of the axial load capacity of the open-stiffened cylindrical shell structure, and even easily leads to optimization failure.
[0005] The local reinforcement design of the existing open-stiffened cylindrical shell structure often relies on excessive finite element analysis. During the design and optimization process, fine finite element analysis needs to be called many times, and the optimization efficiency is very low.
Although a lot of work has been carried out in this field, an efficient opening reinforcement method suitable for axially stiffened cylindrical shells has not yet been given

Method used

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  • Opening reinforcement method of shaft pressing reinforced cylindrical shell
  • Opening reinforcement method of shaft pressing reinforced cylindrical shell
  • Opening reinforcement method of shaft pressing reinforced cylindrical shell

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[0035] 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.

[0036] figure 1 It is a flow chart of the realization of the opening reinforcement method of the axially pressure-stiffened cylindrical shell provided by the embodiment of the present invention. Such as figure 1 As shown, the opening reinforcement method of the axially reinforced cylindrical shell provided by the embodiment of the present invention includes:

[0037] Step 100, d...

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Abstract

The invention relates to the field of aerospace structure main load-bearing member design, and provides an opening reinforcement method of a shaft pressing reinforced cylindrical shell. The opening reinforcement method of the shaft pressing reinforced cylindrical shell comprises the following steps: step 100, dividing the shaft pressing reinforced cylindrical shell with an opening into a distal opening area and a proximal opening area; step 200, establishing an equivalent stiffness model in the distal opening area, establishing a fine geometric model in the proximal opening area, and obtaining a hybrid analysis model of the shaft pressing reinforced cylindrical shell; step 300, peforming opening reinforcement and optimization on the shaft pressing rinforced cylindrical shell, and verifying an optimal result. According to the opening reinforcement method of the shaft pressing rinforced cylindrical shell, the opening reinforcing efficiency of the shaft pressing rinforced cylindrical shell can be improved, and the computing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of design of main load-bearing components of aerospace structures, in particular to an opening reinforcement method for an axially pressure-reinforced cylindrical shell. Background technique [0002] Thin-walled reinforced structures have the characteristics of light weight and good load-bearing performance, and are widely used in the modern aerospace industry. In order to meet the needs of equipment installation, pipeline laying, heat dissipation, etc., there are inevitably openings in thin-walled stiffened sections of aerospace structures, such as interstage sections and instrument compartments of missile rocket structures, and aircraft fuselages. The structural material and stiffness discontinuity caused by openings will cause local disturbances in the displacement field and stress field of the stiffened shell, destroying the moment-free stress state, resulting in a decrease in the bearing capacity of the...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 郝鹏王博田阔李刚杜凯繁牛飞莫怡华周春晓
Owner DALIAN UNIV OF TECH
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