A Design Method for Fatigue Test of Aircraft Suspension Joint Structure

A joint structure and fatigue test technology, applied in the field of aviation fatigue damage tolerance test, to achieve the effect of correct theoretical basis, clear engineering concept and clear analysis steps
CN105975704BActive Publication Date: 2019-06-28XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
Publication Date
2019-06-28

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to an airplane suspension joint structure fatigue test design method comprising the following steps: 1, building a whole-aircraft finite element model and carrying out whole-aircraft solution; 2, carrying out load distribution according to each flange rigidity proportion so as to obtain the load of each flange, and simplifying a testpiece structure form; 3, building a local detail model and carrying out calculation solution; 4, obtaining fatigue margin of a test zone and a transition segment; 5, enhancing the rigidity of the transition segment structure according to the obtained fatigue margin; 6, determining transition segment length L1 and L2; 7, loading according to a preset cycle sequence and cycle frequency so as to carry out fatigue tests. The airplane suspension joint structure fatigue test design method is based on the features that the airplane suspension joint structure is complex in jointing, more in transfer lines, and hard to design tests; the airplane suspension joint structure fatigue test design method can provide loads and load distribution rules of joints and each bolt, thus finally determining a testpiece structure form and loading scheme.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of aviation fatigue damage tolerance test, in particular to a design method for fatigue test of aircraft suspension joint structure. Background technique

[0002] The key points and difficulties of aircraft structural fatigue tests are usually reflected in the planning and formulation of test programs. When formulating the test plan, a lot of theoretical analysis and calculations are required to ensure that the test plan can not only truly simulate the stress state of the test piece, but also consider the feasibility of the test.

[0003] For a simple connection joint structure, the position of the load point and the direction of the load are fixed, but the value of the load changes under various load conditions, so only a single point load can be applied to simulate the test state. For the connection joint structure with complex structure and complex stress state, because the load magnitude and load action point are...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More