长时间驾驶所引起的肌肉疲劳是影响驾驶舒适性的重要因素，并使驾驶人腰背痛的发病率增加。汽车振动是驾驶人肌肉疲劳快速发展的关键诱因，但其诱发机理尚不明确。本项目拟以驾驶人腰背部肌肉骨髂生物力学系统为研究对象，研究振动诱导下驾驶人腰背部肌肉的神经反馈调节机制和生物力学负载，揭示汽车振动诱发驾驶人疲劳加速发展的内在机理。主要研究内容有：（1）驾驶人肌肉骨骼生物力学模型被动振动特性研究及建模；（2）振动诱导下骨骼肌的腱反射机制及模型化表征；（3）振动诱导下腰背部肌肉系统的神经反馈调节机制；（4）建立考虑神经反馈控制的肌肉骨骼生物力学模型，定量给出汽车振动与驾驶人腰背部肌肉负载的关联特性。该项目研究将阐释汽车振动诱发的人体肌肉疲劳加速发展的内在机理，建立基于驾驶人肌肉骨骼生物力学模型的振动仿真研究方法，为定量评价和预测汽车振动工况下的驾驶舒适性奠定理论基础，为车辆的舒适性设计提供理论依据。

Muscle fatigue caused by Long time driving is an important factor affecting driving comfort, and it increases the incidence of low back pain. Vehicle vibration is one of the key factors that accelerate the development of muscle fatigue, but its fundamental mechanism is still unclear. This project will focus on driver’s lumbar musculoskeletal system and study the vibration induced neural feedback regulation mechanism and biomechanical loads, which help understand how the whole body vibration accelerate the development of muscle fatigue. The main research contents includes: (1) modeling of the passive vibration characteristics of drivers’ musculoskeletal system; (2) mechanism of tendon reflex induced by small stretch vibration and its modelling characterization; (3) vibration induced neural feedback regulation mechanism of lumbar muscle system; (4) lumbar musculoskeletal system modelling considering neural feedback regulation and quantitative study on the correlation between vibration and lumbar muscle loads. The study of the project will explain the mechanism of muscle fatigue development induced by whole body vibration, establish a modeling & simulation method of studying the effects of vehicle vibration on driver musculoskeletal biomechanical system, which help lay a theoretical foundation for the quantitative evaluation and prediction of driving comfort under the conditions of vehicle vibration, and provide a theoretical basis for the comfort design of vehicle.