Akbari Ali, Margolis Donald
Department of Mechanical and Aerospace Engineering, UC Davis, CA, USA.
Heliyon. 2024 Feb 16;10(4):e26375. doi: 10.1016/j.heliyon.2024.e26375. eCollection 2024 Feb 29.
Musculoskeletal biomechanical models have wide applications in ergonomics, rehabilitation, and injury estimation. Their use can be extended to enable quantitatively explaining and estimating ride comfort for a vehicle's passenger. A biomechanical model of the upper body in the sagittal plane is constructed, which allows for curved motion to simulate the propagation of disturbance energy within a seated passenger aboard a moving vehicle. The dynamic predictions of the model are validated against experimental results within the literature. Frequency responses show that within the vehicular frequency range, the L4L5 and the L5S1 discs in the lower lumbar region are susceptible to the highest vibration transmission. It was also found that vibration transmission is maximized at around 4.5 Hz. The model provides analytical and geometric intuition into the motion of the various segments of the upper body using a few simple geometric assumptions and can be employed to develop a quantitative ride-comfort metric, such that the most comfortable ride would be that which would induce the least internal motion within the passenger model.
肌肉骨骼生物力学模型在人体工程学、康复和损伤估计方面有广泛应用。其用途可扩展到定量解释和估计车辆乘客的乘坐舒适性。构建了矢状面上半身的生物力学模型，该模型允许进行曲线运动，以模拟行驶车辆上就座乘客体内干扰能量的传播。该模型的动态预测与文献中的实验结果进行了验证。频率响应表明，在车辆频率范围内，下腰部区域的L4L5和L5S1椎间盘最容易受到最高的振动传递。还发现振动传递在约4.5Hz时最大。该模型使用一些简单的几何假设，为上半身各节段的运动提供了分析和几何直观，可用于开发定量的乘坐舒适性指标，即最舒适的乘坐是在乘客模型内引起最少内部运动的乘坐。
