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    Design Optimization Study of a Nonlinear Energy Absorber for Internal Combustion Engine Pistons

    Source: Journal of Computational and Nonlinear Dynamics:;2018:;volume( 013 ):;issue: 009::page 90910
    Author:
    Dolatabadi, N.
    ,
    Theodossiades, S.
    ,
    Rothberg, S. J.
    DOI: 10.1115/1.4040239
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Piston impacts against the cylinder liner are the most significant sources of mechanical noise in internal combustion (IC) engines. Traditionally, the severity of impacts is reduced through the modification of physical and geometrical characteristics of components in the piston assembly. These methods effectively reduce power losses at certain engine operating conditions. Frictional losses and piston impact noise are inversely proportional. Hence, the reduction in power loss leads to louder piston impact noise. An alternative method that is robust to fluctuations in the engine operating conditions is anticipated to improve the engine's noise, vibration and harshness (NVH) performance, while exacerbation in power loss remains within the limits of conventional methods. The concept of targeted energy transfer (TET) through the use of nonlinear energy sink (NES) is relatively new and its application in automotive powertrains has not been demonstrated yet. In this paper, a TET device is conceptually designed and optimized through a series of parametric studies. The dynamic response and power loss of a piston model equipped with this nonlinear energy sink is investigated. Numerical studies have shown a potential in reducing the severity of impact dynamics by controlling the piston's secondary motion.
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      Design Optimization Study of a Nonlinear Energy Absorber for Internal Combustion Engine Pistons

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4253681
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    contributor authorDolatabadi, N.
    contributor authorTheodossiades, S.
    contributor authorRothberg, S. J.
    date accessioned2019-02-28T11:11:41Z
    date available2019-02-28T11:11:41Z
    date copyright7/26/2018 12:00:00 AM
    date issued2018
    identifier issn1555-1415
    identifier othercnd_013_09_090910.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4253681
    description abstractPiston impacts against the cylinder liner are the most significant sources of mechanical noise in internal combustion (IC) engines. Traditionally, the severity of impacts is reduced through the modification of physical and geometrical characteristics of components in the piston assembly. These methods effectively reduce power losses at certain engine operating conditions. Frictional losses and piston impact noise are inversely proportional. Hence, the reduction in power loss leads to louder piston impact noise. An alternative method that is robust to fluctuations in the engine operating conditions is anticipated to improve the engine's noise, vibration and harshness (NVH) performance, while exacerbation in power loss remains within the limits of conventional methods. The concept of targeted energy transfer (TET) through the use of nonlinear energy sink (NES) is relatively new and its application in automotive powertrains has not been demonstrated yet. In this paper, a TET device is conceptually designed and optimized through a series of parametric studies. The dynamic response and power loss of a piston model equipped with this nonlinear energy sink is investigated. Numerical studies have shown a potential in reducing the severity of impact dynamics by controlling the piston's secondary motion.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDesign Optimization Study of a Nonlinear Energy Absorber for Internal Combustion Engine Pistons
    typeJournal Paper
    journal volume13
    journal issue9
    journal titleJournal of Computational and Nonlinear Dynamics
    identifier doi10.1115/1.4040239
    journal fristpage90910
    journal lastpage090910-12
    treeJournal of Computational and Nonlinear Dynamics:;2018:;volume( 013 ):;issue: 009
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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