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Modelling and simulation of an integrated human-vehicle system with non-linear cushion contact force
Simulation Modelling Practice and Theory ( IF 4.2 ) Pub Date : 2020-10-06 , DOI: 10.1016/j.simpat.2020.102206
Raj Desai , Anirban Guha , P. Seshu

Driver comfort is related to human-seat interaction forces and the seat suspension system. For a human body subjected to vertical seat vibration, the head exhibits vertical as well as fore-aft motion, which leads to high forces in the neck. In order to capture these effects, a detailed 12 degrees of freedom two-dimensional seated human body model with inclined backrest support is developed to study direct and cross-axis seat to head transmissibility. The human model is then integrated with a non-linear cushion-human interaction model. The cushion parameters are obtained using a genetic algorithm and a global criterion-based scheme to minimize the least square difference between experimental contact force-time signal and analytical results. Subsequently, the human body model, along with a non-linear seat cushion model, are incorporated into a full vehicle model. Seat suspension parameters are obtained by minimizing the seat effective amplitude transmissibility and human body comfort factors. Both random road excitation and sudden bumps on the road have been studied. The influence of the human body's position in the vehicle and parameter sensitivity with respect to cushion-human interaction force, vertical and fore-aft head acceleration are investigated for multi-compression damper with an inclined damper-seat suspension system. The angle of inclination of the damper has been found to be the parameter with the highest sensitivity. These results and the modelling methodology are expected to lead to a better way of analyzing biodynamic response of the driver.



中文翻译:

具有非线性缓冲接触力的集成人车系统的建模与仿真

驾驶员的舒适度与人座椅相互作用力和座椅悬架系统有关。对于经受垂直座椅振动的人体而言,头部表现出垂直运动以及前后运动,这会导致颈部受到很大的力。为了捕获这些效果,开发了带有倾斜靠背支撑的详细的12自由度二维坐姿人体模型,以研究直接和横轴座椅到头部的可传递性。然后将人体模型与非线性缓冲-人体交互模型集成在一起。使用遗传算法和基于全局准则的方案获得缓冲参数,以最大程度地减小实验接触力-时间信号与分析结果之间的最小平方差。随后,人体模型以及非线性座垫模型 被纳入整车模型。座椅悬架参数是通过使座椅的有效振幅传递率和人体舒适度系数最小化来获得的。已经研究了随机道路激励和道路上的突然颠簸。研究了带有倾斜式减震器-座椅悬架系统的多压缩减震器的人体位置和参数灵敏度对坐垫-人的相互作用力,垂直和前后头部加速度的影响。已经发现阻尼器的倾斜角度是具有最高灵敏度的参数。这些结果和建模方法有望导致分析驾驶员生物动力响应的更好方法。座椅悬架参数是通过使座椅的有效振幅传递率和人体舒适度系数最小化来获得的。已经研究了随机道路激励和道路上的突然颠簸。研究了带有倾斜式减震器-座椅悬架系统的多压缩减震器的人体位置和参数灵敏度对坐垫-人的相互作用力,垂直和前后头部加速度的影响。已经发现阻尼器的倾斜角度是具有最高灵敏度的参数。这些结果和建模方法有望导致分析驾驶员生物动力响应的更好方法。座椅悬架参数是通过使座椅的有效振幅传递率和人体舒适度系数最小化来获得的。已经研究了随机道路激励和道路上的突然颠簸。研究了带有倾斜式减震器-座椅悬架系统的多压缩减震器的人体位置和参数灵敏度对坐垫-人的相互作用力,垂直和前后头部加速度的影响。已经发现阻尼器的倾斜角度是具有最高灵敏度的参数。这些结果和建模方法有望导致分析驾驶员生物动力响应的更好方法。研究了带有倾斜式减震器-座椅悬架系统的多压缩减震器的人体位置和参数灵敏度对坐垫-人的相互作用力,垂直和前后头部加速度的影响。已经发现阻尼器的倾斜角度是具有最高灵敏度的参数。这些结果和建模方法有望导致分析驾驶员生物动力响应的更好方法。研究了带有倾斜式减震器-座椅悬架系统的多压缩减震器的人体位置和参数灵敏度对坐垫-人的相互作用力,垂直和前后头部加速度的影响。已经发现阻尼器的倾斜角度是具有最高灵敏度的参数。这些结果和建模方法有望导致分析驾驶员生物动力响应的更好方法。

更新日期:2020-10-12
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