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TOFC (Trailer on Flatcar) Lading Response Analyses for Several Track Profile and Hunting Conditions.

PB80178171

Publication Date	1980
Personal Author	Kachadourian, G.
Page Count	73
Abstract	The computer program FRATE is a non-linear, time domain digital computer program developed under Federal Railroad Administration sponsorship for the purpose of studying freight car response dynamics. The trailer on flatcar (TOFC) simulation contained in FRATE was expanded, for the purposes of the analyses of this report, to include a compliant lading representation. The compliant lading consisted of two spring mounted masses in each trailer with vertical, lateral and roll degrees of freedom. Analyses were performed to obtain the response of the TOFC vehicle and compliant lading to several track profiles and body hunting conditions. The analysis results characterize the response of a standard TOFC configuration to typical service conditions. Undesirable response conditions are noted and recommendations are made for improvements.
Keywords	Freight cars Railroad tracks Dynamic response Computerized simulation Mathematical models Resonant frequency Computer programming FRATE computer program Ride quality
Source Agency	Federal Railroad Administration
NTIS Subject Category	85I - Railroad Transportation
Corporate Authors	MITRE Corp., McLean, VA. METREK Div.; Federal Railroad Administration, Washington, DC.
Document Type	Technical Report
Title Note	Technical rept.
NTIS Issue Number	198017
Contract Number	DOT-FR-54090

TOFC (Trailer on Flatcar) Lading Response Analyses for Several Track Profile and Hunting Conditions.

TOFC (Trailer on Flatcar) Lading Response Analyses for Several Track Profile and Hunting Conditions.
PB80178171

Publication Date	1980
Personal Author	Kachadourian, G.
Page Count	73
Abstract	The computer program FRATE is a non-linear, time domain digital computer program developed under Federal Railroad Administration sponsorship for the purpose of studying freight car response dynamics. The trailer on flatcar (TOFC) simulation contained in FRATE was expanded, for the purposes of the analyses of this report, to include a compliant lading representation. The compliant lading consisted of two spring mounted masses in each trailer with vertical, lateral and roll degrees of freedom. Analyses were performed to obtain the response of the TOFC vehicle and compliant lading to several track profiles and body hunting conditions. The analysis results characterize the response of a standard TOFC configuration to typical service conditions. Undesirable response conditions are noted and recommendations are made for improvements.
Keywords	Freight cars Railroad tracks Dynamic response Computerized simulation Mathematical models Resonant frequency Computer programming FRATE computer program Ride quality
Source Agency	Federal Railroad Administration
NTIS Subject Category	85I - Railroad Transportation
Corporate Authors	MITRE Corp., McLean, VA. METREK Div.; Federal Railroad Administration, Washington, DC.
Document Type	Technical Report
Title Note	Technical rept.
NTIS Issue Number	198017
Contract Number	DOT-FR-54090