中文摘要：

为提高驾驶人的乘坐舒适性,本文中对汽车座椅腰靠进行研究。基于驾驶人肌肉骨骼生物力学模型,对坐姿驾驶人在第三腰椎部位处3种不同凸出量（0,2和4cm）的腰靠支撑条件下,仿真求解了腰部椎间关节力和肌肉负载。结果表明,4cm凸出量的腰靠支撑下,驾驶人腰部的椎间关节力平均下降8%、肌肉负载平均下降15%,而2cm凸出量的腰靠支撑却使腰部椎间关节力和肌肉负载均略有升高。本文从腰部载荷的角度解释了腰靠凸出量对改善乘坐舒适性影响的内在机理,所提出的仿真方法可实现不同腰靠支撑下腰部载荷的定量评估,为座椅腰靠的舒适性设计提供指导。

英文摘要：

For enhancing the ride comfort of drivers,the lumbar support of vehicle seat is studied in this paper. Based on driver＇s musculoskeletal biomechanical model built,the reaction forces in lumbar vertebral joint and related muscle forces are simulated and solved under three different lumbar support prominence（ LSP） settings（ 0cm,2cm and 4cm） at 3rd lumbar vertebra. The results show that while 4cm LSP reduces 8% lumbar vertebral joint reaction force and 15% lumbar muscle forces in average,2cm LSP makes them slightly increase. The paper gives explanations on the inherent mechanism of LSP＇s effects in improving ride comfort based on lumbar loadings.The proposed method can achieve quantitative assessment of lumbar loads under different LSPs,providing guidance for the comfort design of seat lumbar support.