{"title":"Explicit and Computational Fluid Dynamics Analysis of a Novel Polo Helmet Design: A Parametric Study","authors":"Mohammad Al-Rawi, Li Zheng, Russ Best","doi":"10.1115/1.4063650","DOIUrl":null,"url":null,"abstract":"Abstract Polo is a popular sport in New Zealand, Australia, the United Kingdom, and many other countries. Polo is a vigorous sport involving players and horses moving at speed and can result in head injuries caused by falls. Helmets play a vital role in the safety and protection of Polo players. This study investigates different hemispheric bumper shapes of the helmet to improve the impact resistance performance using finite element analysis (FEA) and explicit dynamics analysis (EDA). The aerodynamic performance of the proposed helmet is investigated using computational fluid dynamics (CFD) to account for drag impact on the Polo player's speed. These are investigated for impact resistance and the drag coefficient under different speeds. The EDA results show that the new proposed bumper will absorb the impact and reduce the energy transferred to the inside foam at a relative impact speed of 6.2 m/s, as recommended by the U.S. Consumer Product Safety Commission (CPSC), with a maximum total deformation of 4.42 mm compared to 4.19 mm and 3.85 mm for impact speeds of 5.9 m/s by the European standard PAS015:2011 helmets for equestrian use and 5.42 m/s BS EN 1078 helmets for bicyclists' use, respectively. Additionally, under speeds ranging from 15 km/h to 65 km/h, the new helmet demonstrated a drag coefficient of 0.454, similar to that of the national team helmet, at 0.423.","PeriodicalId":73734,"journal":{"name":"Journal of engineering and science in medical diagnostics and therapy","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of engineering and science in medical diagnostics and therapy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1115/1.4063650","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Abstract Polo is a popular sport in New Zealand, Australia, the United Kingdom, and many other countries. Polo is a vigorous sport involving players and horses moving at speed and can result in head injuries caused by falls. Helmets play a vital role in the safety and protection of Polo players. This study investigates different hemispheric bumper shapes of the helmet to improve the impact resistance performance using finite element analysis (FEA) and explicit dynamics analysis (EDA). The aerodynamic performance of the proposed helmet is investigated using computational fluid dynamics (CFD) to account for drag impact on the Polo player's speed. These are investigated for impact resistance and the drag coefficient under different speeds. The EDA results show that the new proposed bumper will absorb the impact and reduce the energy transferred to the inside foam at a relative impact speed of 6.2 m/s, as recommended by the U.S. Consumer Product Safety Commission (CPSC), with a maximum total deformation of 4.42 mm compared to 4.19 mm and 3.85 mm for impact speeds of 5.9 m/s by the European standard PAS015:2011 helmets for equestrian use and 5.42 m/s BS EN 1078 helmets for bicyclists' use, respectively. Additionally, under speeds ranging from 15 km/h to 65 km/h, the new helmet demonstrated a drag coefficient of 0.454, similar to that of the national team helmet, at 0.423.
马球运动在新西兰、澳大利亚、英国和其他许多国家都很流行。马球是一项激烈的运动,涉及运动员和马匹的快速移动,可能会导致头部受伤。头盔在马球运动员的安全和保护中起着至关重要的作用。采用有限元分析(FEA)和显式动力学分析(EDA)对不同形状的半球形安全帽保险杠进行了研究,以提高其抗冲击性能。利用计算流体动力学(CFD)研究了该头盔的空气动力学性能,以考虑阻力对马球运动员速度的影响。研究了不同速度下的抗冲击性能和阻力系数。EDA结果表明,新提出的保险杠将吸收的影响和减少能量转移到内部泡沫的相对影响速度6.2米/秒,推荐由美国消费者产品安全委员会(消费品安全委员会),4.42毫米的最大总变形而影响4.19毫米和3.85毫米5.9 m / s的速度由欧洲标准PAS015:2011头盔用于马术5.42 m / s BS EN 1078头盔骑自行车的使用,分别。此外,在15公里/小时至65公里/小时的速度范围内,新头盔的阻力系数为0.454,与国家队头盔的0.423相似。