Selected methods of accelerated durability tests of systems and subsystems of high mobility vehicles

Abstract

The analysis of selected methods useful in accelerated testing of systems and subsystems of high mobility vehicles has been presented. The paper contains information about a few methods applied in calculating the load signal in time and frequency domians: Constant Amplitude Loading - CAL, Peak Valley Extraction - PVE, Block Load Sequence - BLS, Statistical Exceedance Method - SEM, Increasing Load Frequency - ILF, Multiaxial Peak Valley Extraction - MPVE, Time Correlated Fatigue Analysis - TCFA, Simple PSD Scaling, Shock Response Spectrum - SRS, Extreme Response Spectrum - ERS, Fatigue Damage Spectrum - FDS. Parameters such as pseudo - damage, equivalent loads and equivalent mileage have been presented as well. Those parameters are useful when the influence of road conditions on durability of the vehicle is compared. An initial assessment has been presented on the example of a tested vehicle of high mobility. The high mobility wheeled vehicle was tested in various on- and off-road conditions at the proving ground test center. After tests the signal of load acting on a chosen element of the vehicle frame was inspected, corrected and analyzed. The goal of testing was to find the method to calculate the remaining useful life of the main part of the vehicle. The results obtained have proved the validity of the adopted accelerated testing procedure for this type of vehicles.