Integrating modal and vibro-acoustic analyses for modelling dynamic behaviour of machine tools.

The paper deals with the analysis and modelling of dynamic behaviour of machine tools with the purpose of optimisation concerning system vibrations, precision of forged parts, structure and tooling deflections, etc. An innovative approach in studying vibro-acoustic behaviour of machines tools has been considered, in which classical modal analysis is combined with the vibro-acoustic analysis. Based on this approach, the research work is organized in the following three main steps: • the experimental analysis in which acceleration and sound pressure data are collected from accelerometers and microphones monitoring a machine tool; • the Boundary Elements (BE) analysis of the system including machine tool structure, the surrounding environment as well as sources of excitation; • the comparison between experimental and numerical analyses with the purpose of calibration of BE model