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Effective method for quickly eliminating residual stress of heterogeneous component

A residual stress and heterogeneous technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as lack of scientific basis, achieve the effect of improving calculation accuracy, increasing grid density, and reducing workload

Inactive Publication Date: 2012-11-28
BEIHANG UNIV
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Problems solved by technology

Through the search of the existing technical literature based on finite element analysis, it is found that the research on heterogeneous components is mostly focused on the dynamic design analysis of the heterogeneous components as a whole or the method of calculating the parameter drift of heterogeneous components; for screws, it is also concentrated It is mainly used to study the pre-tightening force change or creep relaxation analysis of the screw itself under high temperature conditions; and the research on the elimination of residual stress by vibration aging is mainly carried out by experimental methods, and because the selection of vibration aging process parameters is entirely based on experience, it lacks scientific knowledge. basis, which is blind

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  • Effective method for quickly eliminating residual stress of heterogeneous component
  • Effective method for quickly eliminating residual stress of heterogeneous component
  • Effective method for quickly eliminating residual stress of heterogeneous component

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0039] The following examples are as follows figure 1 The implementation of the flow shown mainly includes establishment of finite element model, static structural analysis, modal analysis, harmonic response analysis and transient dynamic analysis. The heterogeneous component assembly consists of a table body, two dynamic tuning gyroscopes, three quartz flexible accelerometers, screws, flanges, bearings, bases, etc. Since this embodiment mainly studies the variation of screw preload near the accelerometer on the heterogeneous component, only the solid models of the heterogeneous component platform, accelerometer and screw are established.

[0040] The present invention is an effective method for quickly eliminating the residual stress of heterogeneous components, such as figure 1 As shown, the steps are as follows:

[0041] Step 1: Establish ...

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Abstract

The invention relates to an effective method for quickly eliminating residual stress of a heterogeneous component. The method comprises the following steps of: (1) establishing a heterogeneous component finite element model, wherein the establishing process comprises structure simplification, geometrical model establishment, material attribute definition and grid division; (2) carrying out staticstructural analysis on the heterogeneous component finite element model, and obtaining the residual stress and the distribution thereof of the heterogeneous component through applying screw pretightening force; (3) carrying out modal analysis and calculation on the heterogeneous component finite element model to obtain inherent frequencies of eight front steps of the heterogeneous component, and selecting a preset frequency from the inherent frequency as a vibration aging parameter; (4) carrying out harmonic analysis and calculation on the heterogeneous component finite element model to obtain a relation curve of the deformation amount and the frequency of the heterogeneous component, and determining a vibration amplitude value required during vibration aging through simulating a result; and (5) carrying out transient dynamic analysis on the heterogeneous component finite element model, and obtaining the distribution of the residual stress of the heterogeneous component after the vibration aging through the transient dynamic analysis and calculation.

Description

technical field [0001] The invention provides an effective method for quickly eliminating residual stress of heterogeneous components, in particular relates to an effective method for quickly eliminating residual stress of heterogeneous components caused by screw pretightening force based on finite element, and belongs to the technical field of finite element simulation. Background technique [0002] Inertial components such as accelerometers are installed on the platform of heterogeneous components through screws. During long-term storage and use, due to the relaxation of screw pre-tightening force, the assembly deformation of heterogeneous components will occur, resulting in installation error angles and affecting System parameter stability. In recent years, due to the application of electronic computers and the new progress of calculation methods, the finite element analysis method, as a powerful numerical analysis tool, has been widely used in the engineering field. Thr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 许丹肖长玲陈云霞康锐
Owner BEIHANG UNIV
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