Lectures

This course is concerned with different methods for modeling techniques in machine acoustics. First, a fundamental model concept is developed. Then, different models for the modeling of machine acoustic problems are discussed, whereby the fundamental equation of machine acoustics serves as a guide. Special topics of modeling are to be linked to current research topics of the SAM department.

• Overview of numerical and experimental methods of machine-acoustic modeling
• Modeling of dynamic excitation forces that cause structure-borne and airborne noise: basic analysis of pulse-shaped forces in the time and frequency domain, dynamic forces due to shocks, pressure changes and discontinuous force transmission, e.g. B. with gears, and measures to reduce excitation forces
• Modeling of structure-borne noise transmission in thin-walled plate and shell structures: Modeling with analytically solvable equations of motion, finite element modeling, simplified modeling using estimation methods, rules for modeling and validating numerical models
• Attenuation of structure-borne noise: Attenuation models and methods for the experimental determination of attenuation
• Modeling the sound radiation: spherical emitter model, modeling the degree of radiation of thin-walled plate structures, acoustic short circuit, radiation modes
• special topics of acoustic modeling: uncertainty in machine acoustic modeling, model laws, structure intensity, statistical energy analysis (SEA)