For efficient modeling of engine (or powertrain) supported by non-linear elastic mounts, a special methodology has been elaborated. Based on it, software tool has been developed to analyze the motion of rigid body and elastic mounts, which comprises of three modules:

• Non-linear static analysis;

• Modal analysis (undamped and damped);

• Forced response (in frequency domain).

Application example of a large V12 marine engine illustrates the suggested workflow.

The results are verified against other software tools and validated by measurements.

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