The engineering jobs contain calculations and simulations (above all TORSIONAL VIBRATIONS) of straight, branched, and intermeshed drive systems also considering nonlinear characteristics (e.g. rubber couplings, gear stages with backlash, shift and engage effects, etc.) in the time or frequency domain. It is possible to observe steady-state conditions or time-transient effects in the simulation environment. Furthermore, control effects may be part of the torsional vibration model.
The CAE results show the natural frequencies (critical speeds), the presentation and interpretation of the vibration modes (modular forms, mode shapes), and also the expected amplitudes and magnitudes (usually taken from torque signals, velocities and speeds, accelerations) depending on the existing excitations (from the motor, the engine, the working process, and the operating conditions). Possible resonances can be predestinated – similar to a „weather forecast“ of a technical system.
Even dynamic-acoustic effects can be predicted as part of so-called NVH studies (NVH = noise, vibration, harshness) which are important when optimizing automotive drivelines and complete powertrains. Special references and extended information particularly on this subject are available on request.
More detailed information concerning all these subjects will be presented on this web site soon.
Reference/Source: RBTS, Inc. / USA (Software: ARMD)
Reference/Source: ESI-ITI, Dresden / Germany (Software: SimulationX)