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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。
In order to improve the ride comfort of the driver, this paper studies the car seat lumbar support. Based on the musculoskeletal biomechanical model of the driver, the lumbar intervertebral joint force and muscular load were solved by simulating the lumbar support of sitting driver in the third lumbar spine at three different protrusion (0, 2 and 4 cm) . The results show that under the support of 4cm lumbar support, the lumbar intervertebral joint force of the driver decreases by 8% on average and the muscle load decreases by 15% on average. However, the lumbar support with 2cm bulge causes the lumbar intervertebral joint force and Muscle load were slightly higher. In this paper, the internal mechanism of the effect of lumbar protrusion on the ride comfort is explained from the perspective of waist load. The proposed simulation method can be used to quantitatively evaluate the lumbar load under different lumbar support, Provide guidance.