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Method for drawing double-layer titanium alloy casing enthalpy curve

A kind of curve drawing, titanium alloy technology, applied in the direction of instrument, geometric CAD, calculation, etc., can solve the problems of inaccurate selection of numerical simulation parameters, lack of experimental verification of inclusive empirical formula, etc., to achieve the effect of good accuracy

Inactive Publication Date: 2018-10-12
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In the current research on casing containment, the parameter selection in the numerical simulation is not accurate enough, and the experimental verification of the containment empirical formula is lacking.

Method used

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  • Method for drawing double-layer titanium alloy casing enthalpy curve
  • Method for drawing double-layer titanium alloy casing enthalpy curve
  • Method for drawing double-layer titanium alloy casing enthalpy curve

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0025] The embodiment of the present invention discloses a method for drawing a containment curve of a double-layer titanium alloy casing, including:

[0026] Step 1: If figure 1 It is a schematic diagram of the target shooting test. When the thickness distribution of the double-layer titanium alloy casing is 5mm for the inner casing and 5mm for the outer casing, that is, the thickness of the inner and outer target plates of the double-layer titanium alloy target plate i...

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Abstract

The invention provides a method for drawing a double-layer titanium alloy casing enthalpy curve, and discloses a method for drawing a double-layer titanium alloy casing enthalpy curve. A smooth bore is used for the target test to simulate a high-speed blade impacting the casing, and the finite element simulation software LS-DYNA is used to perform numerical simulation on the target test, wherein the blade is made of the JOHNSON-COOK material model, and the target board adopts the SIMPLIFIED-JOHNSON-COOK material model. Compared with the accuracy of verifying the numerical simulation, appropriate simulation parameters are acquired. The simulation is used to simulate the tolerance critical speed of the double-layer titanium alloy casing under different condition, and the target test resultsare substituted for verification, thereby realizing the fitting of the tolerance curve formula of the casing.

Description

technical field [0001] The invention relates to the field of aero-engine casing inclusiveness research and computer simulation, in particular to a method for drawing a double-layer titanium alloy casing inclusiveness curve. Background technique [0002] With the increasing demand of military and civil aviation, the development of aero-engines with higher performance, greater reliability and durability is imminent. When the blades on the engine break due to factors such as foreign object impact or high cycle fatigue and hit the casing, the casing may break and the blades will fly out of the breach. The engine failure caused by the non-containment event of the casing may cause an accident that threatens flight safety, and the research on the containment of the engine casing is of great significance to aviation safety. Shooting test and numerical simulation are two effective means to study inclusive problems, combining them can achieve the purpose of short research cycle, accu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 万云帆
Owner NANJING UNIV OF SCI & TECH
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