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

A Method for Roughness Evaluation of Highway Runway Based on Vibration Acceleration

A vibration acceleration and evaluation method technology, applied in geometric CAD, sustainable transportation, special data processing applications, etc., can solve problems irrelevant to aircraft performance

Active Publication Date: 2020-05-15
AIR FORCE UNIV PLA
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for evaluating the flatness of highway runways based on vibration acceleration, which solves the problem that the evaluation of the flatness of airports has nothing to do with aircraft performance

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
  • A Method for Roughness Evaluation of Highway Runway Based on Vibration Acceleration
  • A Method for Roughness Evaluation of Highway Runway Based on Vibration Acceleration
  • A Method for Roughness Evaluation of Highway Runway Based on Vibration Acceleration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0072] The present invention will be described in detail below in combination with specific embodiments.

[0073] The invention adopts a given aircraft to carry out mechanical simulation operation, so as to obtain the vibration law of the center of gravity of the aircraft and the driving position. Determine an acceleration value according to the bearing capacity of the personnel. If the vibration of the aircraft does not exceed this range, it is considered acceptable. This evaluation method is more objective and accurate, applicable to various types of aircraft, and suitable for the use of road runways.

[0074] 1 Establish a mechanical model

[0075]Build an asymmetric mechanical model: including nose landing gear, left landing gear and right landing gear. Assuming that each landing gear traverses a different runway profile and has a point of contact with it, each of the three gears passes through three profile lines.

[0076] Simulates the lift and drag of gas, with thru...

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 discloses a method for evaluating the smoothness of a highway runway based on vibration acceleration. First, an asymmetrical mechanical model is established: including front landing gear, left landing gear and right landing gear. According to the model, establish the aerodynamic equation of the aircraft landing gear, the damping force equation of the aircraft landing gear, the tire force equation of the aircraft, and the function of the longitudinal section of the runway; establish the motion equation, including the rigid body motion equation and the flexible body motion equation; according to the Lagrange energy equation, Establish the 6-degree-of-freedom vibration equation of the aircraft; use the TAYLOR series expansion to solve the 6 vibration motion equations, and obtain the 6-degree-of-freedom vibration acceleration of different parts of the aircraft when it moves on the runway; evaluate the runway through the vibration acceleration. The beneficial effect of the invention is that the evaluation method is relatively objective and accurate, and is suitable for various aircraft types and suitable for the use of road runways.

Description

technical field [0001] The invention belongs to the technical field of road runway construction, and relates to a method for evaluating the flatness of a road runway based on vibration acceleration. Background technique [0002] At present, there are mainly two types of methods for evaluating the roughness of airports: the driving quality evaluation method and the road surface relief height evaluation method. [0003] The driving quality evaluation method is subjective evaluation and grading through the responses of pilots and passengers. The disadvantage of this method is that due to the relatively fast speed of the aircraft, the degree of dispersion of personnel experience is relatively large. At the same time, because the pilots are not flying many types of aircraft, the experience of different aircraft is not comparable, so this method is not suitable for road runways. [0004] Pavement relief height evaluation method is mainly used in construction quality control. The...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15
CPCG06F30/15Y02T90/00
Inventor 李光元许巍邵斌史保华
Owner AIR FORCE UNIV PLA
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