Unlock instant, AI-driven research and patent intelligence for your innovation.

Design method of easy-to-break rod and easy-to-break rod designed by using method

A design method, flange technology, applied in the field of airport detection equipment

Active Publication Date: 2021-08-13
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of how to establish the structure and design method of the frangible rod of the FOD detection system to ensure that the system has long-term reliability while satisfying the frangible characteristics. Easy-Break Rods Designed by Method

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Design method of easy-to-break rod and easy-to-break rod designed by using method
  • Design method of easy-to-break rod and easy-to-break rod designed by using method
  • Design method of easy-to-break rod and easy-to-break rod designed by using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This embodiment provides an easy-to-break rod, which is an axisymmetric structure, including an upper flange 1, a lower flange 2, a round pipe 3, and a gap 4, and the upper flange 1 and the lower flange 2 are respectively located above and below the round pipe 3 , the round pipe 3 is provided with a gap 4, and the circumference of the upper flange 1 and the lower flange 2 are provided with mounting holes 5 for connecting with other equipment of the FOD system; the wall thickness of the round pipe 3 is 3mm; the gap 4 It is a semicircular notch, and the radius of the notch 4 is 1mm; the processing tool of the easy-breakable rod is a ball head cutter, and the diameter of the ball head is the same as the diameter of the notch 4; the elongation rate of the material used for preparing the easy-breakable rod is 3% to 8%, the ratio of tensile strength σb to pulsation fatigue limit strength σ0 does not exceed 3.4.

[0056] The design method of this easy-break bar is as follows: ...

Embodiment 2

[0088] This embodiment provides an easy-to-break rod, which is an axisymmetric structure, including an upper flange 1, a lower flange 2, a round pipe 3, and a gap 4, and the upper flange 1 and the lower flange 2 are respectively located above and below the round pipe 3 , the round pipe 3 is provided with a gap 4, and the circumference of the upper flange 1 and the lower flange 2 are provided with mounting holes 5 for connecting with other equipment of the FOD system; the wall thickness of the round pipe 3 is 2.5mm; the gap 4 is a semicircular notch, the radius of the notch is 1.5mm; the processing tool for the breakable rod is a ball head cutter, and the diameter of the ball head is the same as the diameter of the notch; the elongation rate of the material used to prepare the breakable rod is 3% ~8%; the ratio of the tensile strength σb to the pulsation fatigue limit strength σ0 of the material used to prepare the frangible rod is not more than 3.4.

[0089] The steps of the d...

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

PUM

PropertyMeasurementUnit
Wall thicknessaaaaaaaaaa
Yield strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of airport detection devices, in particular to a design method of an easy-to-break rod and the easy-to-break rod designed through the method. The easy-to-break rod is of an axisymmetric structure and comprises an upper flange, a lower flange, a circular tube and a notch, the upper flange and the lower flange are located above and below the circular tube respectively, and the semicircular notch is formed in the circular tube. The wall thickness H of the circular tube is 2-5 mm, and the radius R of the semicircular notch is more than 0 and less than H. During design, the wall thickness of the circular tube and the radius of the notch are adjusted by calculating an external load and the stress deformation of a material until qualification, so that the easy-to-break rod solves the problem of how to ensure that an FOD detection system has long-term use reliability while meeting the easy-to-break characteristic, and the problem that the easy-to-break rod and the FOD system are broken due to fatigue can be avoided.

Description

technical field [0001] The invention relates to the technical field of airport detection equipment, in particular to a design method of a breakable bar and a breakable bar designed using the method. Background technique [0002] Foreign objects (FOD) on airport pavement is a chronic disease that affects the safety of airport operation for a long time. In 2016, the Civil Aviation Administration of China issued a notice to use high-tech foreign object detection equipment (FOD detection system) to realize the prevention and management of FOD, thus promoting the rapid development of the FOD detection system. As an airport roadside device, the FOD detection system must meet the requirements of fragility, that is, the system can withstand a bending moment of 204Nm without damage, and it should be able to disconnect before the bending moment reaches 680Nm. [0003] The above two load requirements on the frangible rod belong to the structural fracture characteristics, which can ens...

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

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F30/17G06F30/23G06T17/20G06F119/02G06F119/04G06F119/14
CPCG06F30/17G06F30/23G06T17/20G06F2119/02G06F2119/04G06F2119/14
Inventor 方坤史乃青付庆霞佟文清阮浩茆天宇程仕祥杨鑫鑫
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST