Equivalent method of predicting thermomechanical fatigue life

A thermomechanical fatigue and thermomechanical technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve reliability uncertainty, ignore engine damage, etc.

Inactive Publication Date: 2018-10-26
ZHONGBEI UNIV
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  • Abstract
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Problems solved by technology

[0003] At present, the life prediction of thermomechanical fatigue is mainly evaluated by isothermal fatigue under high temperature conditions, but in this case, the damage to the engine caused by temperature changes is ignored, so this traditional method of predicting thermomechanical fatigue by high temperature fatigue Uncertainty about reliability

Method used

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Embodiment Construction

[0022] In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] Embodiments of the present invention provide

[0024] An equivalent method for predicting thermomechanical fatigue life, comprising the following steps:

[0025] S1. According to the structural form of thermomechanics and the requirements of ride comfort and handling stability parameters, use ADAMS to establish a thermomechanical dynamic model, and obtain the ADAMS hard point file. The ADAMS hard point file at least includes the hard points of the thermomechanical location information;

[0026] S2, read the coordinate value of each hard point in the ADAMS hard point file, form a modifiable hard point table;

[0027] S3. Establish a har...

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Abstract

The invention discloses an equivalent method of predicting thermomechanical fatigue life. The method comprises the steps of: establishing a thermomechanical dynamics model, and obtaining a hard-pointfile; forming a modifiable hard-point table; establishing a hard-point thermomechanical construction model; carrying out parametric processing on a hard-point thermomechanical-construction-model; establishing a thermomechanical component construction point and line model of each thermomechanical component; designing detailed moduli of each component, and constructing a thermomechanical parameterized DMU model; and inserting virtual sensors and virtual actuators in the thermomechanical parameterized DMU model, and carrying out thermomechanical performance analysis. According to the method, thermomechanical performance analysis and detection can be completed while design is carried out, fusion of architectural design and performance design is realized, and thermomechanical optimization can be carried out according to different needs. According to the method, thermomechanical fatigue testing is realized through construction of the thermomechanical parameter model and a mode of simulationanalysis, and performance influences of various parameters on each thermomechanical component are fully considered.

Description

technical field [0001] The invention relates to the field of thermomechanical detection, in particular to an equivalent method for predicting thermomechanical fatigue life. Background technique [0002] Thermal engine fatigue strength design is an important content in the strength design of high-temperature components such as aero-engines and gas turbines. When the engine in actual service is started, steady-state flight and shutdown, the turbine blades of the engine not only bear the constant temperature load but also bear the influence of the thermal load. This loading condition greatly shortens the life of turbine engine blades and reduces the reliability of critical engine components. [0003] At present, the life prediction of thermomechanical fatigue is mainly evaluated by isothermal fatigue under high temperature conditions, but in this case, the damage to the engine caused by temperature changes is ignored, so this traditional method of predicting thermomechanical f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 冯昕宇祝锡晶王建青庞学慧赵韡
Owner ZHONGBEI UNIV
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