Judgment method for cabin explosion small-deformation plastic damage mode problem

A small deformation and pattern technology, applied in CAD numerical modeling, special data processing applications, instruments, etc., can solve problems such as forecasting and judgment scarcity

Active Publication Date: 2020-09-08
HARBIN ENG UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are very few studies on the analysis of small deformation damage modes of cabin implosion to obtain the connection and difference between different modes
Forecasting and judging the damage mode of the hull frame structure under small deformation is even rarer and extremely precious

Method used

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  • Judgment method for cabin explosion small-deformation plastic damage mode problem
  • Judgment method for cabin explosion small-deformation plastic damage mode problem
  • Judgment method for cabin explosion small-deformation plastic damage mode problem

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] The invention relates to a judging method for the small deformation plastic damage mode of a cabin implosion. The invention mainly focuses on forecasting, analyzing and judging the small plastic deformation caused by shock waves, and mainly works on the judging method of the damage mode under the small deformation of the plate frame structure. The invention can be directly applied to the prediction of small deformation damage mode of cabin implosion, and has important guiding significance for ship cabin design.

[0038] A method for judging the small deformation plastic damage mode of cabin implosion, comprising the following steps:

[0039] Step 1: According to the pressure time history curve measured by the pressure sensor in the center of the cabin frame after the explosion, calculate the equivalent overpressure P of the shock wave load 1 ;

[0040]

[0...

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Abstract

The invention belongs to the technical field of explosion damage evaluation, and particularly relates to a judgment method for a cabin explosion small-deformation plastic damage mode problem. The method is based on the basic principle of plastic dynamics; a damage mode judgment method under a small deformation condition is deduced; an estimation formula of response of different load factors to thefinal deflection of the center of the grillage structure is given; numerical verification is given to a theoretical calculation result, and the result shows that the small-deformation damage mode judgment method derived by the invention has certain reference, has certain accuracy for estimating the maximum deflection of the grillage structure, meets the requirement of rapid estimation and has engineering value. On one hand, after the load is given, the damage mode of each cabin can be quickly forecasted; and on the other hand, when the cabin explosion test is designed, the cabin structure design and the explosive quantity selection can be preliminarily estimated according to the wanted damage effect.

Description

technical field [0001] The invention belongs to the technical field of explosion damage assessment, and in particular relates to a method for judging the small deformation plastic damage mode of a cabin implosion. Background technique [0002] Today, with more types of weapons and more threats, the frequency of cabin implosions has increased dramatically. However, many researches have been carried out on the damage mode of the grillage structure caused by cabin implosion. Eftis J simultaneously considers the transverse shear membrane force, nonlinear dynamic strain strengthening effect, and geometric nonlinear problems of large deformation of the ship plate structure under the action of transient explosion impact loads, and uses a combination of experimental methods and theoretical calculations. , verified the effectiveness of the method, and proposed the Bodner-Partom and Chaboche material constitutive models to calculate the explosion impact problem. Based on the rigid-p...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F111/10G06F119/14
CPCG06F30/20G06F2111/10G06F2119/14
Inventor 姚熊亮王逸南王治王志凯洪峰吴子奇郑健
Owner HARBIN ENG UNIV
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