AN ASSESSMENT OF THE STRUCTURAL MODIFICATIONS OF THE GRUMMAN FLXIBLE 870 ADVANCED DESIGN BUS
This report on the adequacy of the structural modifications to the Grumman Flxible 870 Advanced Design Bus was made at UMTA's request. Structural fatigue had developed in the A-frame, engine cradle, trunnion, front mechanical assembly and coach body of this lightweight model within 2 years after the first of them had gone into service. By December 1980 a thousand of the 2800 then delivered had been removed from service and the manufacturer had undertaken an analysis of the problem and development of a correction which involved welding reinforcements on the structures and improving weld quality control. Grumman modified all the buses it had delivered and vehicles on the production line were appropriately modified. The TSC structural analysis is described and modifications were checked to determine if they would permit a targeted service life of 500,000 miles. It was concluded that this service life could be achieved.
Transportation Systems Center55 Broadway, Kendall Square
Cambridge, MA United States 02142
Urban Mass Transportation Administration400 7th Street, SW
Washington, DC United States 20590
- Publication Date: 1982-3-5
- Features: References;
- Pagination: n.p.
- TRT Terms: Buses; Failure; Industries; Lightweight materials; Quality control; Retrofitting; Structural analysis; Vehicle design; Welding
- Old TRIS Terms: Advanced design buses; Bus design
- Subject Areas: Design; Public Transportation; Vehicles and Equipment;
- Accession Number: 00390691
- Record Type: Publication
- Files: TRIS, USDOT
- Created Date: Dec 30 1984 12:00AM