Riassunto analitico
The design of Powertrain Mounting Systems is a crucial step within the vehicle design process. Many interacting variables, such as mounts’ stiffness and position, must be tuned for meeting conflicting requirements, namely displacement control during shock excitations and vibration isolation. The aim of the project has been the development of a methodology suitable for defining a mounting system for a generic automotive powertrain. Therefore, a modular approach has been required for analysing different powertrain configurations and architectures. A multi-body model in MSC Adams environment has been created, in order to simulate the behaviour of a resiliently supported powertrain under different scenarios. After that, an optimization procedure has been developed, for retrieving mounts’ properties that avoid system’s resonance during operating conditions and that ensure vibration modes' decoupling. Then, a series of loadcases is launched, for retrieving forces and displacements on mounts under limit conditions. For evaluating the effectiveness of the method, an existing powertrain mounting system has been studied and optimized. The methodology and the developed tool have been proved to be helpful in quickly defining Powertrain Mounting Systems’ properties at a preliminary stage of the design process.
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