Determining dynamic response of test object on chassis dynamometer bench for subsequent load simulation

Abstract

Introduction (problem statement and relevance). The given article describes the identification method based on dynamic response of the motorcycle load-bearing structure when driving over individual roughnesses installed on the bench dynamometric rollers and assessment of the load-bearing structure loading for subsequent fatigue durability testing mode creation. The assessment shall be performed based on the analysis of the recorded accelerations occurring on the sprung and non-sprung weights, as well as forces and deformation occurring on the suspension elastic elements.
The purpose of the study. Quantitative and qualitative assessment of loading of the motorcycle load-bearing structure when driving over individual roughnesses on the dynamometric roller bench to determine the loading level on the bench, comparing it with the loading levels when driving the motorcycle along the proving ground roads and developing procedures for bench testing.
Methodology and research methods. Methods of statistical analysis, random process schematisation, and frequency response function analysis have been used.
Scientific novelty and results. Vertical accelerations occurring on the sprung and non-sprung weights have been determined, on the basis of which the loading of the motorcycle load-bearing structure is assessed. As a result of the research, the results of the motorcycle loading within the bench environment and when driving the motorcycle along the roads with special surfacing were compared to create a test mode.
Practical significance. Assessment of impact of individual roughnesses on loading of the motorcycle load-bearing structure on the dynamometric roller bench in FSUE “NAMI”. Creating the methodology for testing motorised vehicles (four-wheelers, motorcycles, mopeds, scooters, tricycles, quadricycles).