Inertial platform residual stress release simulating method based on finite element

Abstract

The invention discloses an inertial platform residual stress release simulating method based on a finite element, which comprises the steps of: 1, modeling an initial platform entity, integrally obtaining an initial platform entity model by applying entity drawing software, then guiding the initial platform entity model into finite element simulating software; 2, modeling an air column, establishing initial platform peripheral air into an air column model; 3, assigning initial platform and air column material attributes, inputting the initial platform and air column material attributes according to the requirement on the finite element simulating software; 4, modeling an initial platform and an air column finite element grid, wherein two procedures of selecting a unit type and dividing the grid are included; and 5, coupling and analyzing an initial platform heat-structure, wherein two procedures of transient heat analysis and structure analysis are included: the transient heat analysis is as follows: a temperature cycle stress is loaded on the outer surface of the air column so as to provide heat conditions for the inertial platform residual stress release simulating analysis, andthe structure analysis is as follows: an initial platform transient heat analysis result is loaded to the heat-structure coupling analysis to obtain a rule of releasing the inertial platform residualstress with the temperature cycle stress.

Description

technical field [0001] The invention provides a simulation method for releasing residual stress of an inertial platform based on finite elements, which relates to a simulation method for releasing residual stress of an inertial platform based on finite element thermal-structure coupling analysis, and belongs to the technical field of finite element simulation. Background technique [0002] With the increasingly aggravated national defense tasks and the increasing requirements for combat readiness, the problem of poor stability of inertial platform system parameters is gradually exposed, which seriously restricts the combat effectiveness of weapons and becomes an urgent military demand to be solved. Long-term engineering practice and theoretical research have shown that due to the imperfection of the inertial platform structure design itself (such as unbalanced mass, etc.) and the dispersion of the process (such as uneven machining force, etc.), the inertial platform in the pr...

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Problems solved by technology

However, the residual stress test measurement method based on the precise elastic limit and micro-yield strength can only obtain the residual stress value of a limited number of points, and cannot obtain the distribution law of the residual stress in the inertial platform under the load stress, which has become an urgent problem to be solved

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