Determination of dynamic characteristics of piston-hole-type and bypass-pipe-type oil dampers using computational fluid dynamics

Oil dampers are indispensable devices for vibration suppression, but their nonlinear behavior makes it difficult to theoretically determine their damping characteristics. For that reason, the damping coefficient for oil dampers has conventionally been handled by introducing an experimentally determi...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Itsuro HONDA, Toshihiko ASAMI, Hidetaka SHIOZAKI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	oil damper shock absorber piston-hole-type oil damper bypass-pipe-type oil damper computational fluid dynamics finite difference method immersed boundary method Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/3a186303ccc741ad916c58a4f8acca46
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3a186303ccc741ad916c58a4f8acca46
record_format	dspace
spelling	oai:doaj.org-article:3a186303ccc741ad916c58a4f8acca462021-11-29T06:01:26ZDetermination of dynamic characteristics of piston-hole-type and bypass-pipe-type oil dampers using computational fluid dynamics2187-974510.1299/mej.20-00193https://doaj.org/article/3a186303ccc741ad916c58a4f8acca462020-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/5/7_20-00193/_pdf/-char/enhttps://doaj.org/toc/2187-9745Oil dampers are indispensable devices for vibration suppression, but their nonlinear behavior makes it difficult to theoretically determine their damping characteristics. For that reason, the damping coefficient for oil dampers has conventionally been handled by introducing an experimentally determined constant into theoretical equations. In other words, the characterization of oil dampers has ultimately relied on experimentation. Fortunately, if the damping oil is a Newtonian fluid, the Navier–Stokes equations are able to accurately describe its movement. In our previous study, the Navier–Stokes equations were solved using the finite difference method and the damping coefficient was accurately calculated for an annular-channel-type oil damper. In this paper, we report the damping and added mass characteristics of the commonly used oil dampers, the piston-hole-type and bypass-pipe-type dampers, obtained using the finite difference method as in the previous report. The most basic design formula indicates that the damping coefficients for these dampers are the same when the flow paths are equal in length; however, it was demonstrated in this study that the damping characteristics of these dampers differ greatly depending on the shape of the convective vortex generated in the cylinder. The immersed boundary method was used in the present numerical analysis because the boundary of the fluid to be analyzed is surrounded by fixed and moving walls.Itsuro HONDAToshihiko ASAMIHidetaka SHIOZAKIThe Japan Society of Mechanical Engineersarticleoil dampershock absorberpiston-hole-type oil damperbypass-pipe-type oil dampercomputational fluid dynamicsfinite difference methodimmersed boundary methodMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 5, Pp 20-00193-20-00193 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	oil damper shock absorber piston-hole-type oil damper bypass-pipe-type oil damper computational fluid dynamics finite difference method immersed boundary method Mechanical engineering and machinery TJ1-1570
spellingShingle	oil damper shock absorber piston-hole-type oil damper bypass-pipe-type oil damper computational fluid dynamics finite difference method immersed boundary method Mechanical engineering and machinery TJ1-1570 Itsuro HONDA Toshihiko ASAMI Hidetaka SHIOZAKI Determination of dynamic characteristics of piston-hole-type and bypass-pipe-type oil dampers using computational fluid dynamics
description	Oil dampers are indispensable devices for vibration suppression, but their nonlinear behavior makes it difficult to theoretically determine their damping characteristics. For that reason, the damping coefficient for oil dampers has conventionally been handled by introducing an experimentally determined constant into theoretical equations. In other words, the characterization of oil dampers has ultimately relied on experimentation. Fortunately, if the damping oil is a Newtonian fluid, the Navier–Stokes equations are able to accurately describe its movement. In our previous study, the Navier–Stokes equations were solved using the finite difference method and the damping coefficient was accurately calculated for an annular-channel-type oil damper. In this paper, we report the damping and added mass characteristics of the commonly used oil dampers, the piston-hole-type and bypass-pipe-type dampers, obtained using the finite difference method as in the previous report. The most basic design formula indicates that the damping coefficients for these dampers are the same when the flow paths are equal in length; however, it was demonstrated in this study that the damping characteristics of these dampers differ greatly depending on the shape of the convective vortex generated in the cylinder. The immersed boundary method was used in the present numerical analysis because the boundary of the fluid to be analyzed is surrounded by fixed and moving walls.
format	article
author	Itsuro HONDA Toshihiko ASAMI Hidetaka SHIOZAKI
author_facet	Itsuro HONDA Toshihiko ASAMI Hidetaka SHIOZAKI
author_sort	Itsuro HONDA
title	Determination of dynamic characteristics of piston-hole-type and bypass-pipe-type oil dampers using computational fluid dynamics
title_short	Determination of dynamic characteristics of piston-hole-type and bypass-pipe-type oil dampers using computational fluid dynamics
title_full	Determination of dynamic characteristics of piston-hole-type and bypass-pipe-type oil dampers using computational fluid dynamics
title_fullStr	Determination of dynamic characteristics of piston-hole-type and bypass-pipe-type oil dampers using computational fluid dynamics
title_full_unstemmed	Determination of dynamic characteristics of piston-hole-type and bypass-pipe-type oil dampers using computational fluid dynamics
title_sort	determination of dynamic characteristics of piston-hole-type and bypass-pipe-type oil dampers using computational fluid dynamics
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/3a186303ccc741ad916c58a4f8acca46
work_keys_str_mv	AT itsurohonda determinationofdynamiccharacteristicsofpistonholetypeandbypasspipetypeoildampersusingcomputationalfluiddynamics AT toshihikoasami determinationofdynamiccharacteristicsofpistonholetypeandbypasspipetypeoildampersusingcomputationalfluiddynamics AT hidetakashiozaki determinationofdynamiccharacteristicsofpistonholetypeandbypasspipetypeoildampersusingcomputationalfluiddynamics
_version_	1718407578729316352

Determination of dynamic characteristics of piston-hole-type and bypass-pipe-type oil dampers using computational fluid dynamics

Ejemplares similares