A transient tribodynamic approach for the calculation of internal combustion engine piston slap noise
journal contributionposted on 01.06.2015, 13:27 by Nader Dolatabadi, Bryn Littlefair, Miguel De la Cruz, Stephanos Theodossiades, Steve Rothberg, Homer Rahnejat
An analytical/numerical methodology is presented to calculate the radiated noise due to internal combustion engine piston impacts on the cylinder liner through a film of lubricant. Both quasi-static and transient dynamic analyses coupled with impact elasto-hydrodynamics are reported. The local impact impedance is calculated, as well as the transferred energy onto the cylinder liner. The simulations are verified against experimental results for different engine operating conditions and for noise levels calculated in the vicinity of the engine block. Continuous wavelet signal processing is performed to identify the occurrence of piston slap noise events and their spectral content, showing good conformance between the predictions and experimentally acquired signals.
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The authors wish to express their gratitude to the EPSRC for the financial support extended to the Encyclopaedic Program [grant number EP/G012334/1].
- Mechanical, Electrical and Manufacturing Engineering