Naslov
Modeling of the Nonlinear Frequency Dependent Engine Mount Dynamic Stiffness

Autori
Kovarik, Borna

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, diplomski rad, diplomski

Fakultet
Fakultet strojarstva i brodogradnje

Mjesto
Zagreb

Datum
20.05

Godina
2016

Stranica
69

Mentor
Kozarac, Darko

Ključne riječi
IC engine vibration isolation; engine mounts; dynamic stiffness frequency dependency; dynamic stiffness mathematical model; parameter optimization

Sažetak
One of the main sources of noise and vibrations in the passenger car is internal combustion engine which is coupled with the car chassis by using elastomeric or hydraulic engine mounts. To describe dynamic response of the engine mounts, the dynamic stiffness is used. Engine mount dynamic stiffness behavior is frequency, amplitude and temperature dependent. Emphasis of this study is on mathematical modeling of the dependency on frequency of the engine mount cross point dynamic stiffness. During this study 10 different mathematical models were considered and for further investigation triple mass oscillator was chosen based on optimization results. Triple mass oscillator is described with 15 different linear variables. For all mathematical models the optimization procedure for finding the mathematical model parameter values is defined. Verification of chosen mathematical model is made in the commercial programs that are usually used for flexible multibody dynamics simulation. After mathematical model verification process, the chosen mathematical model was implemented in the internal combustion engine simulation model prepared in AVL Excite Power Unit environment. For simulated IC engine, measurements of engine mounts responses are available and simulation results are compared with the available measurements in form of engine mounts velocities.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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