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|Title:||HEMTT dynamic sensitivity to small obstacles at low velocities. Report 1, Field tests|
|Authors:||United States. Defense Nuclear Agency.|
Jones, Randolph A.
Creighton, Daniel C.
|Publisher:||Geotechnical Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Technical report (U.S. Army Engineer Waterways Experiment Station) ; GL-95-1.|
Abstract: U.S. Army Engineer Waterways Experiment Station conducted dynamic tests using the M977 Heavy Expanded Mobility Tactical Truck (HEMTT) in both the empty and loaded configura1ion crossing low profile linear obstacles in both vehicle tracks. The obstacle heights were 0.25, 0.50, 0.75, 1.00, 1.50, 2.00, 2.50, and 3.00 in. The tests were designed to simulate the process of weigh-in-motion (WIM). The data collected were also used in a separate study which validated a 2-dimensional dynamics model created using the VEHDYN 3.0 code. The instrumentation consisted of vertical accelerometers, rate transducers. and string potentiometers. The testing was conducted at low velocities: 1.8 mph to 4.5 mph. Each test was repeated three times to achieve a database on the range of vehicle responses to similar tests. The data were reduced in the form of time histories, frequency analysis using a FFT, peale dynamic values versus obstacle height, and maximum frequency amplitude versus obstacle height.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|