A finite element method for calculating the deflection of the assembly axis of a rotor considering contact elastic deformation

A rotor assembly and elastic deformation technology, applied in calculation, design optimization/simulation, special data processing applications, etc., can solve problems such as reducing the accuracy of algorithm prediction, achieve both analysis efficiency and accuracy, high calculation efficiency, and reduce analysis the effect of time

Active Publication Date: 2019-03-01
DALIAN UNIV OF TECH
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Problems solved by technology

The input of the algorithm uses the measurement data in the free state before assembly, and these shape data will change during the contact process, which reduces the accuracy of the algorithm prediction

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  • A finite element method for calculating the deflection of the assembly axis of a rotor considering contact elastic deformation
  • A finite element method for calculating the deflection of the assembly axis of a rotor considering contact elastic deformation
  • A finite element method for calculating the deflection of the assembly axis of a rotor considering contact elastic deformation

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Embodiment Construction

[0047]In order to make the purpose, technical solution and advantages of the present invention more clearly described, the following uses the rotor flange modeling corresponding to two sets of end jump data as an example to illustrate the reverse modeling process and the finite element analysis process. The accompanying drawings fully describe the technical solutions in the present invention.

[0048] (1) The cylindricity-waviness measuring instrument is used here to obtain two sets of end jump data, namely D01.xls and D02.xls, and save them to the search path of matlab.

[0049] In order to make the overall outline of the end surface runout data more intuitive, the first set of end runout data is expressed in the form of coordinate points, so that the ups and downs of the shape points can be seen, such as figure 2 As shown, the end-jump data in the two sets of cylindrical coordinate systems are converted into data points in the rectangular coordinate system, and the data poi...

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Abstract

The invention provides a finite element analysis method for calculating the deflection of the assembly axis of a rotor considering the contact elastic deformation, wherein the relationship between theend face runout and the inclination amount is calculated by the finite element analysis method under the condition of considering the contact deformation of the mating surface. Considering such an ideal shell stacking model, the contact part of two shells is tangent to each other when they are initially modeled and assembled, and the two 3D curves are fitted according to the measured end-jump data, which can fully reflect the end-jump topography of the joint surface. The shell stacking model proposed by the invention is based on the finite element analysis method, considers the elastic deformation in the assembly process, and more accurately predicts the axis deflection than the algorithm. Compared with the general finite element analysis model, the shell model proposed in this inventionhas higher computational efficiency, and the finite element model can be optimized continuously to reduce the time of analysis and to give consideration to both analysis efficiency and accuracy.

Description

technical field [0001] The present invention predicts the axis deflection angle and direction of the high-pressure rotor of the aero-engine after assembly through the method of finite element analysis, and proposes a shell stacking model, which is more efficient in calculation than the general finite element analysis model, and considers the joint surface Elastic deformation can be achieved using efficient finite element analysis models to accurately predict rotor deflection. Background technique [0002] Assembly is an important link in the manufacture of mechanical products, and the quality of assembly has an important impact on the performance and reliability of products. Concentricity is an important evaluation criterion for the assembly of high-precision aero-engine components. In order to improve the assembly accuracy of rotor components and improve the success rate of one assembly, it is very important to accurately predict and optimize the assembly phase. [0003] ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 马跃高一超孙伟孙清超
Owner DALIAN UNIV OF TECH
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