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Powerplant Block-Crank Dynamic Interaction and Radiated Noise Prediction
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 05, 2003 by SAE International in United States
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This paper discusses flexible, multi-body, coupled dynamic simulation of a crankshaft system acting upon a power plant structure that includes an engine block, cylinder heads, oil pan, crank train (i.e., crankshaft, connecting rods, bearings etc.) and transmission. The simulation is conducted using AVL/EXCITE . Engine loads are first predicted, and then used to compute radiated noise from the engine assembly. Radiated noise level is computed by sweeping the excitation frequency through a range associated with the normal operating RPM of the engine. The results of the radiated noise computation are plotted on a “3D” Campbell plot diagram. The effects of different crankshaft materials is evaluated by imposing steel and cast iron material properties on the analysis model. A design of experiment (DOE) study is also performed to investigate the effects of main and rod bearing clearance, damper, and flexplate design on overall engine radiated sound power.
This unique tool, used in the early and middle phases of design, is helpful in selecting engine components and crank train system parameters to produce better powertrain NVH performance.
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CitationZhou, M. and Lepi, S., "Powerplant Block-Crank Dynamic Interaction and Radiated Noise Prediction," SAE Technical Paper 2003-01-1735, 2003, https://doi.org/10.4271/2003-01-1735.
- AVL/EXCITE, AVL EXCITE Reference Manual December 2000
- Raub, J. Jones, J. Analytical Investigation of Crankshaft Dynamics as Virtual Engine Module SAE, 1999-01-1750
- Du, Isaac Simulation of flexible Rotating Crankshaft with Flexible Engine Block and Hydrodynamic Bearings for a V6 Engine SAE 1999-01-1752