A Contribution to the Optimization of the Characteristics of Elasto-damping Elements of Passenger Cars

Contribution to research of thermal loads in commercial vehicles powertrain mounts

“…From (Demić, 1990), (Demić, 1997), (Rotenberg, 1972), (Genta, 2003), (Gillespie, 1992), (Milliken & Milliken, 1995), (Simić & Demić, 1992), (Kennings et al, 2014), (Shanguanet al, 2016), it is known that during the analysis of the problem of transferring dynamic loads from the powertrain to the frame (chassis) of the vehicle, the oscillations of the cabin and the carriage compartment can be ignored. More precisely, the analysis includes only the oscillatory movements of the powertrain of the vehicle and the corresponding exitations from the vehicle frame.…”

“…This indicates the need to use as simple mathematical models as possible, because due to the absence of precise inertial and geometric parameters of the powertrain and the vehicle itself, as well as the characteristics of the mounts, more complex models can lead to major errors (Demić, 1990), (Frolov & Furman, 1990).…”

“…The powertrain, as a rigid body in space, has six degrees of freedom (three translations and three rotations), so, to describe its movement, it is necessary to use six independent generalized coordinates (Demić, 1990), (Frolov & Furman, 1990), (Genta, 2003), (Pars, 1981), (Gillespie, 1992), (Milliken & Milliken, 1995). Here are adopted geometric gravity axes for observing the movement of the powertrains, starting at an equilibrium position, which will be discussed later.…”

“…Six generalized coordinates should be introduced to describe the spatial movement of the powertrain: three translations and three rotations (Demić, 1990), (Frolov & Furman, 1990), (Genta, 2003), (Pars, 1981), (Gillespie, 1992), (Milliken & Milliken, 1995). Two coordinate systems will be adopted (Demić, 1990), Figure 2: • immobile (OXYZ), with the origin at the center of gravity of the powertrain (defined in relation to its equilibrium position).…”

“…In the literature (Demić, 1990), (Demić, 1997a), (Demić, 1997b), (Demić, 2002), (Demić, 2013), (Simić, 1988), (Simić & Demić, 1992), (Bendat, 1998), (Igami et al, 2008), (Genta, 2003), (Shanguan et al, 2016) there are a number of mathematical-experimental methods for modeling the behavior of the powertrain. In this paper, a freight vehicle from the FAP 1314 production program, (whose scheme of the suspension of the powertrain is shown in Figure 1) was observed and the modeling process was applied based on the principles of classical mechanics (Atkins, 2010), (Pars, 1981).…”