NVH Experimental Analyses for an Engine Structure Model Assembled with Ordinary Tap Bolts and with Through Bolts

Yamashita, K.; Okamura, Hideo; Shimizu, Sakayu; Sakamoto, Haruhisa; Ishida, Masaharu

doi:10.4271/2003-01-1732

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…The engine vibration is caused by the cylinder gas pressure in cycle changes and the inertial forces of the moving of crank link mechanism [1].A four-stroke diesel engine has an intake, compression, power and exhaust for each operating cycle.In an operating cycle, the crankshaft rotates twice, that is 720 °.Combustion force push the piston up and down motion in the cylinder, piston drives crank link mechanism, and then push the crankshaft rotating movement.The gas pressure in cylinders exerts force on the crank pin formatting alternating tangential force and radial force.The piston, connecting rod, crankshaft and other moving parts brings inertial forces and moment of inertia in the course of the campaign. For multi-cylinder engine, the inertia force can be balanced, but the moment of inertia is often difficult to balance.…”

Section: Introductionmentioning

confidence: 99%

Simulative Analysis of Structure Vibration of Diesel Engine Based on Finite Element Method

Xiao

Kang

2012

AMM

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The simulated prediction of the structural vibration of diesel engine has been made in this paper. The displacement maps on different frequencies were obtained by using finite element model. The FFT (Fast Fourier Transform Algorithm) was used to the displacement data of the parts where the vibration is strong. So, the displacement spectrum was obtained on those points. The study shows that response displacements between 60~500Hz are bigger than others. This is due to the rigid displacement of the diesel engine. There are some other big response displacements around 800Hz, 1400Hz and 1800Hz.This is the result of local vibration of the oil pan, flywheel shell and gear room cover. Improve the three parts structure can effectively reduce vibration of the diesel engine.

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Section: Introductionmentioning

confidence: 99%

Simulative Analysis of Structure Vibration of Diesel Engine Based on Finite Element Method

Xiao

Kang

2012

AMM

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“…) (Yamashita, et al, 2004(Yamashita, et al, , , 2007 102-8554 7-1) E-mail of corresponding author: ken-yama@iaec.isuzu.co.jp ( , 1981, , 1985, , 1986) (Rogers and Boothroyd, 1975) ( 2014) (Eriten, et al, 2012) …”

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confidence: 99%

Design and manufacture of testing measurement and evaluation device for dynamic property of metallic interfaces

Yamashita

Shimizu²,

Sakamoto

2015

Transactions of the JSME (In Japanese)

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Metallic interfaces in mechanical structures cause dynamic damping property. It is very effective to apply this good damping property to engine power plant in order to reduce noise and vibration, however, it is difficult to use dynamic damping property effectively because the mechanism of the damping behavior is not clarified completely. Accordingly, the experimental measuring device was made for the purpose of estimating dynamic damping characteristics of metallic interfaces quantitatively. Applying controlled vertical load to contact surface between metallic specimens, after that, exerting shearing reciprocal force to the interface by linear motion drive mechanism, relative displacement and applied shearing force are measured simultaneously. The dynamic characteristics of contact interfaces are identified as a result of describing hysteresis loops from measuring data. The measuring device was shown to measure damping property precisely in wide frequency range.

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Experiment research on NVH performance of block-head assembly parts of engine

Shu

Liang

2011

2011 International Conference on Electric Information and Control Engineering

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NVH Experimental Analyses for an Engine Structure Model Assembled with Ordinary Tap Bolts and with Through Bolts

Cited by 5 publications

References 3 publications

Simulative Analysis of Structure Vibration of Diesel Engine Based on Finite Element Method

Simulative Analysis of Structure Vibration of Diesel Engine Based on Finite Element Method

Design and manufacture of testing measurement and evaluation device for dynamic property of metallic interfaces

Experiment research on NVH performance of block-head assembly parts of engine

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