Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Test method for verifying opening and closing functions of cargo door

A test method and cargo door technology, applied in the field of functional testing, can solve problems such as the boundaries that cannot truly simulate the opening and closing of the door, test safety threats, and problems that cannot be found in time, so as to achieve easy implementation, strong operability, and ensure safety Effect

Active Publication Date: 2014-02-05
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are mainly two test methods for verifying the opening and closing function of the cargo door: one is to open and close the door when the fuselage structure is not loaded, this verification method cannot truly simulate the boundary of the door opening and closing in flight; the other is The fuselage structure is directly loaded to the limit load, and the opening and closing function test is carried out. This verification method cannot find problems in time during the test, which has a relatively large risk and poses a threat to the safety of the test.

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
  • Test method for verifying opening and closing functions of cargo door

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Taking the comprehensive function test of an aircraft rear body as an example, the verification is carried out.

[0025] First, the rear section of the fuselage equipped with a cargo door and the dummy of the vertical tail joint are selected as the test pieces to verify the function test of the door. The aerodynamic and inertial loads on the fuselage are loaded through adhesive tape; The beam is loaded on the floor plane; the theoretically calculated vertical tail joint load is loaded on the joint through the vertical tail joint dummy, and the cargo door is in a closed state; the fuselage and the vertical tail joint dummy are loaded step by step, when the load is applied to At 30% of the ultimate load, the upper lock of the middle door of the rear cargo door failed to lock; it was later found out that the reason was that the rear fuselage structure sag under the test load was not considered during the installation and commissioning of the middle door retraction and relea...

Embodiment 2

[0028] Taking the comprehensive function test of an aircraft rear body as an example, the verification is carried out.

[0029] First, the rear section of the fuselage equipped with a cargo door and the dummy of the vertical tail joint are selected as the test pieces to verify the function test of the door. The aerodynamic and inertial loads on the fuselage are loaded through adhesive tape; The beam is loaded on the floor plane; the theoretically calculated vertical tail joint load is loaded on the joint through the vertical tail joint dummy, and the cargo door is closed; when the load is applied to 60% of the ultimate load, the first opening and closing of the door During the test, the airtight door of the rear cargo door did not give a lock signal, resulting in the rear three doors not being able to close normally, and the test was suspended; the reason was later found out that the opening edge beam structure under the test load was not considered when the airtight door senso...

Embodiment 3

[0032] Taking the comprehensive function test of an aircraft rear body as an example, the verification is carried out.

[0033] First, the rear section of the fuselage equipped with a cargo door and the dummy of the vertical tail joint are selected as the test pieces to verify the function test of the door. The aerodynamic and inertial loads on the fuselage are loaded through adhesive tape; The beam is loaded on the floor plane; the theoretically calculated vertical tail joint load is loaded on the joint through the vertical tail joint dummy, and the cargo door is closed; when the load is applied to 55% of the ultimate load, the door is opened and closed for the second time During the test, the second set of lock mechanisms on the right side of the rear cargo door failed to open normally, which caused the end of the control rod of the set lock mechanism to be bent. After inspection, the other three sets of lock mechanisms were damaged to varying degrees, and the test was suspen...

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

No PUM Login to View More

Abstract

The invention belongs to the technical field of function test, and relates to a test method for verifying the opening and closing functions of a cargo door designed specific to the opening and closing function test of the cargo door. According to the method, the state of the cargo door during opening and closing function test can be accurately simulated; problems can be found and solved in time in a testing process, and smooth proceeding of the test is ensured; the test risk is lowered, and the safety of the test and test articles is ensured. A test method for verifying the opening and closing functions of the cargo door is realized, the accuracy of test verification is improved, the safety of test is ensured, the problem that the test state cannot be accurately simulated and problems cannot be found in the test process existing in the conventional method are solved, and smooth proceeding of the test is ensured by making adjustment in time.

Description

technical field [0001] The invention belongs to the technical field of function test, and relates to a test method for verifying the opening and closing function of a cargo door, which is used for the design of the opening and closing function test of the cargo door. Background technique [0002] At present, there are mainly two test methods for verifying the opening and closing function of the cargo door: one is to open and close the door when the fuselage structure is not loaded, this verification method cannot truly simulate the boundary of the door opening and closing in flight; the other is Directly load the fuselage structure to the limit load and conduct the opening and closing function test. This verification method cannot find problems in time during the test, which has a relatively large risk and poses a threat to the safety of the test. Contents of the invention [0003] The purpose of the present invention is to propose a test method for verifying the opening a...

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): B64F5/00B64F5/60
Inventor 肖允庚罗远燕薛应举
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com