Modal analysis method under influence of impeller structure thermal stress on the basis of ANSYS

A modal analysis and structural thermal technology, applied in geometric CAD, special data processing applications, instruments, etc., can solve problems such as operation accidents, rotor instability, engine structure damage, etc., and achieve the effect of a reliable theoretical basis

Inactive Publication Date: 2016-08-31
UNIV OF JINAN
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Problems solved by technology

Severe thermal effects will cause blade breakage, rotor instability an

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  • Modal analysis method under influence of impeller structure thermal stress on the basis of ANSYS
  • Modal analysis method under influence of impeller structure thermal stress on the basis of ANSYS
  • Modal analysis method under influence of impeller structure thermal stress on the basis of ANSYS

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Embodiment Construction

[0015] The present invention will be further described with reference to the accompanying drawings and embodiments of the specification.

[0016] Such as figure 1 Shown is a working flow chart of the modal analysis method under the influence of the thermal stress of the impeller structure based on ANSYS in the present invention. There are mainly 2 major components, which are realized by two softwares. The detailed steps are as follows:

[0017] Step 1: 3D modeling of the impeller structure, using the solidworks parametric modeling method for 3D modeling to obtain a 3D model of the impeller structure, such as figure 2 shown;

[0018] Step 2: Establish the finite element model of the impeller structure, import the three-dimensional model of the impeller structure into the finite element analysis software ANSYS, and complete the setting of the unit type, material properties, and material parameters in the pre-processing module of the ANSYS software, and divide the finite elem...

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Abstract

The invention provides a modal analysis method under the influence of impeller structure thermal stress on the basis of ANSYS. The modal analysis method has the following technical scheme: utilizing a solidworks parametric modeling method to establish a three-dimensional model of an impeller structure; introducing the three-dimensional model of the impeller structure into finite element analysis software ANSYS, finishing setting a unit type, material attributes and material parameters in an ANSYS software pretreatment module, and dividing finite element grids; applying temperature load to the impeller structure through a linear interpolation method, and carrying out thermoanalysis on the impeller structure; coupling a thermoanalysis result to a structural unit, and carrying out statics analysis to obtain the thermal stress of the impeller structure; and on the basis of an obtained thermal stress result, carrying out modal analysis which contains prestress on the impeller structure to obtain first five orders of inherent frequency. The modal analysis method has the beneficial effects that a theoretical basis is provided for the research of the failure mechanism of the impeller structure.

Description

technical field [0001] The invention relates to a finite element analysis method of a mechanical structure, in particular to a modal analysis method under the influence of thermal stress of an impeller structure based on ANSYS. Background technique [0002] When the rotating machinery is running, it is in a high temperature state for a long time and is affected by the temperature field, which may easily cause the vibration of the whole machine of the mechanical structure. Severe thermal effects can cause blade breakage, rotor instability and damage to the engine structure, leading to major operating accidents. The invention proposes a modal analysis method based on ANSYS under the influence of the thermal stress of the impeller structure, which can provide a theoretical basis for the research on the failure mechanism of the impeller structure. Contents of the invention [0003] In order to overcome the above technical problems, the present invention provides a modal analy...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 赵慧颖门秀花张琨
Owner UNIV OF JINAN
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