Evaluation of the real life vibration regime and its laboratory equivalent for a helicopter carried structure. Part I The real life

摘要

This is the first of a two-part paper that describes the results of the analysis of vibration measured on a helicopter-carried structure, consisting of a pylon, launcher, and load installed on the launcher. The analysis was performed to generate a laboratory simulation program for the structure. Hence, the paper considers only measurements on the pylon and launcher. Part I of the paper presents the measurement setup, analysis methods and results, and the methods for generating the simulation program. Part II of the paper presents methods for evaluating the vibration transmission paths, the simulation programs, results of their implementation and the significance of the vibration transmission paths on the configuration of the simulation setup.