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Method for constructing turbine disc structure probability design system

A technology for designing systems and constructing methods, which is applied in computing, special data processing applications, instruments, etc., and can solve problems such as design and implementation that have not been documented in literature

Inactive Publication Date: 2010-10-06
BEIHANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

Therefore, the specific design and implementation of the probabilistic design system for the turbine disk structure has not yet been documented.

Method used

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  • Method for constructing turbine disc structure probability design system
  • Method for constructing turbine disc structure probability design system
  • Method for constructing turbine disc structure probability design system

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Embodiment Construction

[0071] A method for constructing a probabilistic design system for a turbine disk structure according to the present invention, the specific steps of the method are as follows:

[0072] Step 1: see figure 1 , the probabilistic design process of the turbine disk structure includes deterministic optimization analysis, three-dimensional stress / strain analysis, material properties, loads, probability analysis of rupture speed, failure mode probability analysis, design decision and expert knowledge base, etc. The data flow of the summary process can be seen ,See figure 2 , the entire probabilistic design process of the turbine disk structure is a process of designing model, analyzing model, modifying model and analyzing model. For the design model, see step 2, and for the process of analyzing the model, see image 3 As shown in Fig. 1, load and boundary conditions are applied to the model, and a single failure mode deterministic analysis is performed. Afterwards, the definition ...

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Abstract

The invention discloses a method for constructing a turbine disc structure probability design system. The method comprises the following six steps of: 1, analyzing a turbine disc structure probability design flow, analyzing a failure mode, and determining a system functional model of the probability design flow; 2, extracting characteristic parameters of a turbine disc meridian plane and a mortise respectively to finish parametric modeling; 3, storing a common material for a turbine disc in a form of spreadsheet to form a material base tool; 4, integrating a rain-flow counting program, processing a standard loading spectrum, providing primary and secondary cyclic loading parameters for low cyclic analysis, integrating an MATLAB data processing function, and expressing fatigue-creep coupling by using a double-parameter characteristic function; 5, researching the heteroscedastic characteristic of a strain life model and providing a model to realize heteroscedastic recursive processing of fatigue test data; and 6, constructing a turbine disc structure probability design system database based on the principle of using a task as a basic unit and using the turbine disc probability design flow as a core. The method has broad application prospect in the field of aerospace engines.

Description

(1) Technical field [0001] As a quantifiable risk analysis method, the probabilistic analysis of turbine disk structure has been gradually applied in high-performance aero gas turbine engines. The invention relates to a construction method of a turbine disk structure probabilistic design system (that is, T-PDS), which belongs to the technical field of engines in aerospace technology. (2) Background technology [0002] The traditional turbine disk structure design method is based on the deterministic design parameters. Assuming that all the characteristic parameters of the structure are definite values, the stress or life analysis of the structure is carried out, and then a safety factor is used to estimate the impact of random factors on the safety of the structure. influences. Since the consequences of turbine disc failure are unimaginable, in order to ensure the normal operation of this core component during the design process, a sufficiently large safety factor is usuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 王荣桥陈景阳蔡坤胡殿印樊江
Owner BEIHANG UNIV
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