Landing Gear Cumulative Stroke-Based Runway Roughness Evaluation

Rough runway will cause metal fatigue problem for aircraft components, make the reading of the instruments difficult for pilots, and reduce comfort of passengers. Correct and rational evaluation methods of runway roughness are important for airport agencies to reasonably distribute the restricted maintenance budget. The main objective of this paper was to propose a reaction evaluation index called Landing Gear Cumulative Stroke (LGCS) which combined the advantage of Boeing Bump Index (BBI) and International Roughness Index (IRI), and explored related criteria of LGCS. In this study, inspired by IRI and quarter car, LGCS model was available to build and required to ensure the parameters included represent aircraft type and taxiing speed. The soft ADAMS/Aircraft was used to simulate the dynamical response of A320, A330 and A380 aircraft taxiing on the measured runway profiles, and four indexes including Pilot’s Station Acceleration (PSA), Center of Gravity Acceleration (CGA), Dynamical Main Gear Load Factor (DMGLF) and Nose Main Gear Load Factor (DNGLF) were collected respectively. The simulation results indicated that PSA and DMGLF should be of more concern than CGA and DNGLF, and the speed of 100 km/h could produce the peak response of aircraft because of the lift force, and the response for small aircraft was more serious than large aircraft. Therefore, LGCS parameters were supposed to contain A320 aircraft type and 100 km/h speed. It was also found that the correlations between LGCS and aircraft response were higher than other evaluation indexes, and thus the feasibility of LGCS as a new evaluation index for runway was validated. Finally, regression models of LGCS and PSA, LGCS and DMGLF were established respectively, and based on the criteria of PSA and DMGLF, the related evaluation criteria of LGCS were explored.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AV070 Standing Committee on Aircraft/Airport Compatibility. Alternate title: Landing Gear Cumulative Stroke Based Runway Roughness Evaluation.
• Authors:
  • Liu, Shifu
  • Ling, Jianming
  • Yuan, Jie
  • Penghui, Li
  • Chen, Junjun
• Conference:
  • Transportation Research Board 97th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2018-1-7 to 2018-1-11
• Date: 2018

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 18p

Subject/Index Terms

• TRT Terms: Airport runways; Correlation analysis; Evaluation; Regression analysis; Roughness; Simulation; Taxiing
• Identifier Terms: Airbus A320; Airbus A330; Airbus A380; Boeing Bump Index (BBI); International Roughness Index; Landing Gear Cumulative Stroke
• Subject Areas: Aviation; Pavements;

Filing Info

• Accession Number: 01660205
• Record Type: Publication
• Report/Paper Numbers: 18-04107
• Files: TRIS, TRB, ATRI
• Created Date: Feb 19 2018 12:01PM