{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282680493543552.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1299/transjsme.16-00520"}},{"identifier":{"@type":"URI","@value":"https://www.jstage.jst.go.jp/article/transjsme/83/847/83_16-00520/_pdf"}},{"identifier":{"@type":"NAID","@value":"130006943725"}}],"dc:title":[{"@language":"ja","@value":"実稼働時の油圧システムにおける作動油中の音速に関する研究"},{"@language":"en","@value":"A Study of speed of sound in hydraulic oil in an operating hydraulic system"}],"dc:language":"ja","description":[{"type":"abstract","notation":[{"@language":"en","@value":"<p>Generally, industrial vehicles such as agricultural machines and construction machinery use hydraulic systems for heavy-load work. Also the work often continues for a long time in a certain area. Consequently, noise exposure of the surrounding environment is increased. Thus noise regulations are established in several countries. The noise emitted from the hydraulic system has a significant contribution to the over-all of the noise in an industrial vehicle. Recently, the choice of power sources in industrial vehicles has tended to shift from internal combustion engines to electric motors. Consequently, the contribution of noise emitted from the internal combustion engine will decrease and the contribution of noise emitted from a hydraulic system will become relatively prominent in the future. It is, therefore, more than ever important to take care of the noise generated by the hydraulic system of the industrial vehicles. It is known that speed of sound in hydraulic oil has an effect on pressure ripples which can be source of noise. Therefore, it is important to understand behavior of the speed of sound reasonably in design of quiet hydraulic systems. However, relationship between operating conditions and the speed of sound has not been revealed up to now. In this study, the speed of sound has been investigated at the operating conditions that are oil temperature, loading pressure, volume ratio of entrained air to the hydraulic oil and type of the oil for typical agricultural machines and construction machinery.</p>"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410282680493543554","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000391754210"}],"foaf:name":[{"@language":"ja","@value":"中川 修一"},{"@language":"en","@value":"NAKAGAWA Shuichi"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Fundamental Technology Research Division, Research and Development Center, Yanmar Co., Ltd."},{"@language":"ja","@value":"ヤンマー(株) 中央研究所 基盤技術研究部"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282680493543553","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000391754211"}],"foaf:name":[{"@language":"ja","@value":"一柳 隆義"},{"@language":"en","@value":"ICHIYANAGI Takayoshi"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Mechanical Systems Engineering, School of System Engineering, National Defense Academy"},{"@language":"ja","@value":"防衛大学校 システム工学群 機械システム工学科"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282680493543552","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000391754212"}],"foaf:name":[{"@language":"ja","@value":"西海 孝夫"},{"@language":"en","@value":"NISHIUMI Takao"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Mechanical Systems Engineering, School of System Engineering, National Defense Academy"},{"@language":"ja","@value":"防衛大学校 システム工学群 機械システム工学科"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"21879761"}],"prism:publicationName":[{"@language":"en","@value":"Transactions of the JSME (in Japanese)"},{"@language":"ja","@value":"日本機械学会論文集"}],"dc:publisher":[{"@language":"en","@value":"The Japan Society of Mechanical Engineers"},{"@language":"ja","@value":"一般社団法人 日本機械学会"}],"prism:publicationDate":"2017","prism:volume":"83","prism:number":"847","prism:startingPage":"16-00520","prism:endingPage":"16-00520"},"reviewed":"false","url":[{"@id":"https://www.jstage.jst.go.jp/article/transjsme/83/847/83_16-00520/_pdf"}],"availableAt":"2017","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Speed%20of%20sound","dc:title":"Speed of sound"},{"@id":"https://cir.nii.ac.jp/all?q=Hydraulic%20system","dc:title":"Hydraulic system"},{"@id":"https://cir.nii.ac.jp/all?q=Pressure%20ripple","dc:title":"Pressure ripple"},{"@id":"https://cir.nii.ac.jp/all?q=Bulk%20modulus","dc:title":"Bulk modulus"},{"@id":"https://cir.nii.ac.jp/all?q=Speed%20of%20sound","dc:title":"Speed of sound"},{"@id":"https://cir.nii.ac.jp/all?q=Hydraulic%20system","dc:title":"Hydraulic system"},{"@id":"https://cir.nii.ac.jp/all?q=Pressure%20ripple","dc:title":"Pressure ripple"},{"@id":"https://cir.nii.ac.jp/all?q=Bulk%20modulus","dc:title":"Bulk modulus"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360855570362635648","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Precise Measurement and Prediction of Bulk-Modulus Values for Fluids and Lubricants"}]},{"@id":"https://cir.nii.ac.jp/crid/1361418520655980928","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Modeling and Experimental Validation of the Effective Bulk Modulus of a Mixture of Hydraulic Oil and Air"}]},{"@id":"https://cir.nii.ac.jp/crid/1362825893994821248","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A Consideration on the Behavior of Hydraulic Pressure Ripples in Relation to Hydraulic Oil Temperature"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233268805491712","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"In-Situ Measurement of the Wavespeed and Bulk Modulus in Hydraulic Lines"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204092159104","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"On the Wave Equation in Hydroacoustic Field"},{"@value":"流体音場の基礎方程式について"},{"@language":"ja-Kana","@value":"リュウタイ オンジョウ ノ キソ ホウテイシキ ニ ツイテ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390286426519501184","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Process for optimization based on inductive approach in design of a hydraulic transmission"},{"@language":"ja","@value":"帰納的アプローチによる油圧式変速機の最適設計プロセス"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2001953577"},{"@type":"CROSSREF","@value":"10.1299/transjsme.16-00520"},{"@type":"CIA","@value":"130006943725"},{"@type":"CROSSREF","@value":"10.1299/transjsme.20-00268_references_DOI_IZYgUVN9DyfpUtwdHTFEpdunbB4"}]}