Nabil Mohamad Usamah, Mohamad Syazwan Md Isa, Ahmad Zhafran Ahmad Mazlan
{"title":"Motorboat engine hand-arm vibration attenuation using dual-dynamic vibration absorbers under different engine gear vibration excitation.","authors":"Nabil Mohamad Usamah, Mohamad Syazwan Md Isa, Ahmad Zhafran Ahmad Mazlan","doi":"10.1080/10803548.2025.2511544","DOIUrl":null,"url":null,"abstract":"<p><p>Direct contact with a small motorboat engine handle exposes operators to high vibration levels, risking hand-arm vibration syndrome (HAVS). This study investigates handle vibration transmissibility and applies dual-dynamic vibration absorbers (DVAs) to reduce vibration within targeted frequencies. A laboratory-scale rig simulates engine operation under varying speeds and gear conditions. Without DVAs, high vibrations occur at 45-50 Hz (Speed 1) and 95-100 Hz (Speed 2). The handle's natural frequencies (70-78 and 92-96 Hz) shift closer to target ranges with DVAs applied. Vibration is reduced by 42.08% in neutral gear (Speed 1) and 53.56% in forward gear (Speed 2). Transmissibility within 0-100 Hz shows a significant drop (<i>T</i><sub>s</sub> < 1), indicating reduced vibration from engine to hand. Standard No. ISO 5349-1-based weighting confirms that DVAs substantially lower vibration risks, helping to prevent HAVS in motorboat operators.</p>","PeriodicalId":47704,"journal":{"name":"International Journal of Occupational Safety and Ergonomics","volume":" ","pages":"1-17"},"PeriodicalIF":1.6000,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Occupational Safety and Ergonomics","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1080/10803548.2025.2511544","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ERGONOMICS","Score":null,"Total":0}
引用次数: 0
Abstract
Direct contact with a small motorboat engine handle exposes operators to high vibration levels, risking hand-arm vibration syndrome (HAVS). This study investigates handle vibration transmissibility and applies dual-dynamic vibration absorbers (DVAs) to reduce vibration within targeted frequencies. A laboratory-scale rig simulates engine operation under varying speeds and gear conditions. Without DVAs, high vibrations occur at 45-50 Hz (Speed 1) and 95-100 Hz (Speed 2). The handle's natural frequencies (70-78 and 92-96 Hz) shift closer to target ranges with DVAs applied. Vibration is reduced by 42.08% in neutral gear (Speed 1) and 53.56% in forward gear (Speed 2). Transmissibility within 0-100 Hz shows a significant drop (Ts < 1), indicating reduced vibration from engine to hand. Standard No. ISO 5349-1-based weighting confirms that DVAs substantially lower vibration risks, helping to prevent HAVS in motorboat operators.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
