负载过程对接触力的影响,当模拟静态座位时,用有限元人体模型模拟静态座位
Shenghui Liu1,2, Philippe Beillas2, Li Ding1
1Key Laboratory of Biomechanics and Mechanobiology, Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
Computer methods in biomechanics and biomedical engineering
|October 4, 2024
概括
一种新的模拟方法,放下和旋转 (D&R),更好地模仿人们的坐姿,改善了座位接口力量和压力风险的预测. 这种方法对摩擦的敏感性低于标准重力下降 (DROP) 方法.
科学领域:
- 生物力学 生物力学
- 人体建模 人体建模
背景情况:
- 座椅接口力,特别是剪切力,对于预测压力和座椅不适至关重要.
- 目前使用有限元人体模型 (HBM) 的静态坐位模拟通常采用重力下降 (DROP) 方法,该方法不准确地代表了自然的坐着过程.
- 高摩擦系数 (COF) 经常用于模拟,可能导致不现实的接触力.
研究的目的:
- 为了研究不同加载过程和COF对使用HBMs的座位模拟的影响.
- 引入和评估一种新的"放下和旋转" (D&R) 装载方法,旨在更准确地模拟个人如何坐着.
- 在力预测和对COF的敏感性方面,将D&R方法与传统的DROP方法进行比较.
主要方法:
- 开发和应用"放下和旋转" (D&R) 装载技术,用于HBM静态座位模拟.
- D&R方法涉及初始的干部曲,随后是部旋转以建立接触,模仿自然的坐姿.
- 在两个不同的座位配置中,对一个经过验证的成年男性HBM进行了模拟.
主要成果:
- 与DROP方法相比,D&R方法显示对COF的敏感性降低.
- 使用D&R方法可以更准确地预测接触力,特别是在座椅板上.
- 虽然在计算上更密集,但D&R方法提供了更好的模拟保真性.
结论:
- 装载过程显著影响静态座位模拟的结果.
- 拟议的D&R方法提供了更现实的座位生物力学模拟,并改善了界面力的预测.
- 未来的研究应该考虑使用D&R方法进行更准确的HBM座位分析,以减轻压力等风险.
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