Aircraft structure linear displacement restraining device and method

By designing a linear displacement constraint device for aircraft structure, the length of the constraint is adjusted to achieve a predetermined preload by using the hinge between the constraint and the wall plate and the support plate, the problem of difficulty in accurately simulating the stress distribution and controlling the stress level in the constraint area in the prior art is solved, and more accurate constraint state simulation and stress distribution control are achieved, meeting the requirements of aircraft structure strength test.

CN119683007AActive Publication Date: 2025-03-25XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
10 Cites 0 Cited by

Patent Information

Application Number
CN202411742273.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-29
Publication Date
2025-03-25
Estimated Expiration
2044-11-29

AI Technical Summary

Technical Problem

In the prior art, in aircraft structural strength tests, it is difficult to accurately simulate the stress distribution near the wall section and control the stress level in the constrained area, especially in non-critical parts or long transition areas.

Method used

A linear displacement constraint device for aircraft structures is designed. By setting multiple constraint holes on the edge of the wall panel, the continuous structure is simplified into a finite point constraint structure, and the hinge of the constraint with the wall panel and the support plate is used to adjust the length of the constraint to achieve a predetermined preload force, thereby constraining only the linear displacement of the wall panel in the epitaxial direction and releasing the degree of freedom in other directions.

Benefits of technology

The device can more accurately simulate the constraint state of the edge strip or wall panel, avoid overconstraint, stress concentration and stress distribution distortion caused by traditional solid-branch structures, meet the requirements of aircraft structure strength tests, and improve the fault tolerance of the test design.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides an aircraft structure linear displacement restraining device, and belongs to the technical field of aircraft structure strength tests.The restraining structure comprises a wall plate, and a plurality of restraining holes are formed in the edge of the wall plate and used for simplifying a continuous structure into a finite point restraining structure; the supporting flat plate is provided with a mounting hole matched with the constraint hole in the wall plate, and a mounting seat is mounted in the mounting hole; the restraining piece is hinged to the restraining hole of the wall plate and the installation base of the supporting flat plate, the length of the restraining piece is adjusted so that the pre-tightening force of the supporting flat plate on the wall plate can reach a preset value, only linear displacement in the extension direction of the wall plate with the broken section is restrained through the restraining piece, and the freedom degree in other directions is released. According to the aircraft structure linear displacement restraining device and method, the restraining state of the edge strip or the wall plate can be better simulated, the problems of over-restraining, stress concentration, stress distribution distortion and the like caused by traditional direct fixing and supporting are solved, and the aircraft structure strength test requirement is met.
Need to check novelty before this filing date? Find Prior Art