Experimental validation of sound quality simulation and optimization of a four-cylinder diesel engine

A novel sound quality simulation approach was proposed to optimize the acoustic performance of a four-cylinder diesel engine. Finite element analysis, single-input and multiple-output technology, flexible multi-body dynamics, and boundary element codes were used to acquire the hexahedron-element mod...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Zhejiang University. A. Science 2013-05, Vol.14 (5), p.341-352
Main Authors: Mao, Jie, Hao, Zhi-yong, Zheng, Kang, Jing, Guo-xi
Format: Article
Language:English
Subjects:
Acoustic noise
Acoustics
Blocking
Civil Engineering
Classical and Continuum Physics
Computer simulation
Engineering
Industrial Chemistry/Chemical Engineering
Mathematical analysis
Mechanical Engineering
Optimization
Sound
Vibration
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel sound quality simulation approach was proposed to optimize the acoustic performance of a four-cylinder diesel engine. Finite element analysis, single-input and multiple-output technology, flexible multi-body dynamics, and boundary element codes were used to acquire the hexahedron-element model, experimental modal frequencies, vibration velocities, and structurally radiated noise of the block, respectively. The simulated modal frequencies and vibration velocities agreed well with the experimental data, which validated the finite-element block. The acoustic response showed that considerable acoustic power levels existed in 1500 1900 Hz and 2300 2800 Hz as the main frequency ranges to optimize the block acoustics. Then, the optimal block is determined in accordance with the novel approach, which reduces the overall value, high-frequency amplitudes, and peak values of acoustic power; thus, the loudness, sharpness, and roughness decline to make the sound quieter, lower-pitched, and smoother, respectively. Finally, the optimal block was cast and bench-tested. The results reveal that the sound quality of the optimal-block engine is substantially improved as numerically expected, which verifies the effectiveness of the research approach.
ISSN:1673-565X
1862-1775
DOI:10.1631/jzus.A1300055