Multibody analýza klikového ústrojí s pružnými tělesy

Powertrain Multibody Analysis with Flexible Bodies

conference paper

en

The development process in internal combustion engine at the present time requires CAE models that deliver the results for the concept phase of the prototype. The combustion engine is a very complex problem consisting of many partial problems. The major problem is the interaction of the crankshaft and the crankcase. For more precise solution of this problem it is necessary to use complex 3-D models. Finite element method (FEM, ANSYS software used) and Multi-Body Systems (MBS, ADAMS software used) are suitable for calculation of these problems. The finite element model is converted from ANSYS into ADAMS. The finite element models are too complicated for MBS and require a reduction. For the reduction of FE models the Craig-Bampton method is used. The comparison of the calculation and the measurement is still a decisive quality criterion in the CAE environment. Non-contact measurements with laser Doppler vibration meters enable to verify the complex calculation models.

Vývoj nových pohonných jednotek vyžaduje aplikaci CAE modelů již v prvních etapách projektu. Návrh hnacího ústrojí spalovacího motoru je komplexní problém, především řešení interakce klikového mechanismu a bloku motoru. Příspěvek se zabývá možnostmi aplikace programů MKP a multi-body systémů pro řešení této úlohy, zejména problematikou zahrnutí MKP modelů substruktur hnacího ústrojí jako pružných těles do multi-body systémů. Verifikace výpočtových modelů je realizována bezkontaktním měřením laserovými vibrometry.

The development process in internal combustion engine at the present time requires CAE models that deliver the results for the concept phase of the prototype. The combustion engine is a very complex problem consisting of many partial problems. The major problem is the interaction of the crankshaft and the crankcase. For more precise solution of this problem it is necessary to use complex 3-D models. Finite element method (FEM, ANSYS software used) and Multi-Body Systems (MBS, ADAMS software used) are suitable for calculation of these problems. The finite element model is converted from ANSYS into ADAMS. The finite element models are too complicated for MBS and require a reduction. For the reduction of FE models the Craig-Bampton method is used. The comparison of the calculation and the measurement is still a decisive quality criterion in the CAE environment. Non-contact measurements with laser Doppler vibration meters enable to verify the complex calculation models.

Multibody systém, kliková hřídel, radiální ložisko, pružné těleso, modelování

Multibody system, crankshaft, radial bearing, flexible body, simulation

2002

24.09.2002

Špindlerův mlýn

3rd ADAMS Users Meeting

11