A LUMPED MASS EXHAUST SYSTEM MODEL
In the present paper the dynamics of an exhaust system is under observation. In order to study the system vibrations, to perform modal analysis and the vibration isolation, the exhaust system is modeled by using lumped masses. The system of the differential equations of the exhaust system structure is derived and placed in matrix form. Natural frequencies and the modal vectors for the first modes of vibration can be determined. This approach has the target to rapidly find the modal and vibration parameters of an exhaust system to get a first feeling of the system dynamics getting rid, at this stage, of the gas flow through the pipes and the mufflers. This is a prerequisite for the hanger’s parameters optimization in the effort to minimize the transferred forces to the chassis.
Keywords: exhaust system, lumped masses, system of differential equations.
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