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Method for researching chiseling effect of rocket sled shoe rail

A rocket sled and effect technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as limitations, inability to reproduce pressure cores and mixing of materials, and determining whether chiseling is difficult to achieve. Efficiency, saving test costs, and the effect of accurate chisel phenomenon

Pending Publication Date: 2021-03-30
XI AN JIAOTONG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, although there are domestic precedents for simulating chiseling by finite element method, due to the limitations of the above objective conditions,
Neither the Lagrangian method nor the Euler method can reproduce the pressure core and material mixing phenomenon generated during chiseling, which makes it difficult to determine whether chiseling occurs
The CTH program often used abroad is still described by Euler, so it also has the limitation of the Euler description method.

Method used

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  • Method for researching chiseling effect of rocket sled shoe rail
  • Method for researching chiseling effect of rocket sled shoe rail
  • Method for researching chiseling effect of rocket sled shoe rail

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Embodiment Construction

[0046]The invention provides a research method for the chiseling effect of the rocket sled shoe rail. An equivalent plane strain model is established by simplifying the sled body above the sled shoe in the rocket sled test; the Stefani-Parker semi-empirical formula is used to determine the rocket sled shoe , The pairing standard of the slide rail material, and select the material that can meet the test requirements according to this standard; select the appropriate constitutive model and state equation to describe according to the behavior of the material when chiseling occurs, and obtain relevant parameters through experiments; based on the material The point method theory and NairnMPM software are used to establish the design model, add materials and boundary conditions and complete the calculation; the analysis results show the critical conditions of the rocket sled chipping effect and the influence of different factors on the critical conditions.

[0047] see figure 1 , th...

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Abstract

The invention discloses a method for researching chiseling effect of a rocket sled shoe rail. An equivalent plane strain analysis model is established by simplifying a sled body part on a rocket sledsystem sliding shoe; then, a Stefani-Parker semi-empirical formula is adopted to determine and analyze matching standards of sliding shoe and sliding rail materials used by the model; a proper constitutive model and a state equation are selected according to the behavior of the material during chiseling; finally, a corresponding model is designed in combination with actual working conditions to research critical conditions generated by the chiseling effect and influence rules of different factors on the critical conditions. The establishment of the model is completed and calculated based on amaterial point method theory in combination with NairnMPM software and a result is analyzed.

Description

technical field [0001] The invention belongs to the technical field of research on the chiseling effect of a rocket skid shoe and a rail, and in particular relates to a research method for the chisel effect of a rocket skid shoe rail. Background technique [0002] The rocket sled test can be used to solve a series of technical problems caused by high speed, acceleration and deceleration in the field of aerospace, weapon system and other tests. The chiseling process usually involves large deformation of materials, plastic flow, generation of high temperature and high pressure cores, and strong nonlinear constitutive relations. Therefore, the shoe-rail material usually has the generation and propagation of stress shock wave, the phase transition of solid-liquid-gas state, and the formation of cavities due to the mixing of materials caused by jet flow. These complex material behaviors objectively increase the difficulty of research on this issue. Therefore, how to successfull...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/20G06F119/14G06F119/08G06F111/10
CPCG06F30/15G06F30/20G06F2119/14G06F2119/08G06F2111/10Y02T90/00
Inventor 田晓耕汪振兴干聪李志峰刘振
Owner XI AN JIAOTONG UNIV
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