Two common methods for analyzing the crushing force of thin-walled steel beams with rectangular section in symmetrical mode

Abstract

The invention provides a method for analyzing the crushing force of two commonly used thin-walled steel rectangular cross-section beams in a symmetrical mode. The force expression; the second step is to deduce the rectangular cross-section thin-walled beams composed of two steel plates with different materials and different thicknesses, two steel plates with different materials but the same thickness, and two steel plates with the same material but different thicknesses. The expression of the average crushing force under the two mixed forms; and the engineering approximation of the average crushing force expressions of the three situations obtained in the second step; Accurately predicting and analyzing the crushing performance of a commonly used thin-walled beam with mixed steel rectangular cross-section can realize the forward design of the thin-walled beam structure, greatly reduce the number of simulation trials and experiments, shorten the development cycle, and reduce the design cost.

Description

technical field [0001] The invention relates to the field of passive safety research of automobiles, and relates to a method for analyzing the crushing force of two commonly used steel rectangular cross-section thin-walled beams in a symmetrical mode, and specifically relates to a method for analyzing steel plates made of two different materials and having different thicknesses, and made of two materials A method for analyzing the crushing force of steel plates of different but the same thickness and of thin-walled beams of rectangular cross-section welded by two steel plates of the same material but of different thicknesses. Background technique [0002] Thin-walled beam structure is a common energy-absorbing component in the fields of automobiles, ships, aviation and aerospace, etc. Its axial crush deformation is stable and energy absorption is significant, and it is an important topic in the study of crashworthiness. At present, the crashworthiness design of thin-walled b...

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Problems solved by technology

[0005] In order to solve the problem that the finite element method or test method cannot be used to analyze the crush performance of thin-walled beams due to the lack of detailed structural geometric models in the conceptual design stage of the crashworthiness of the car body, the present invention proposes two commonly used thin-walled steel beams with rectangular cross-sections in a symmetrical mode The crushing force analysis method, under the condition of only size parameters and material properties, is used for steel plates made of two different materials and different thicknesses, steel plates made of two different materials but the same thickness, and steel plates made of two materials the same but different thicknesses Analysis of the crushing performance of welded thin-walled rectangular cross-section beams

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