Digital human modeling software uses biomechanical models to compute workers' risk of injury during industrial work processes. In many cases, the biomechanics are calculated using quasistatic models, which neglect the body's dynamics and therefore might be erroneous. This study investigated the differential effect of using a dynamic vs. a quasistatic model on spinal loading during combined manual material handling tasks that are prevalent in industry. An experiment was conducted involving nine male and nine female participants performing a total of 3402 cycles of a box-conveying task (removing, carrying and depositing) for different box masses and shelf heights. Using motion capture data, the peak and cumulative moments acting on the L5/S1 joint were calculated using 3D dynamic and quasistatic models. This revealed that neglecting the dynamic movements (i.e., using a quasistatic model) results in an on average underestimation of 19.7% in the peak spinal moment and 3.6% in the cumulative moment that in some cases exceeds the maximal limit for the compression forces acting on the lower back.

数字人体建模软件使用生物力学模型来计算工人在工业工作过程中受伤的风险。在许多情况下，生物力学是使用准静态模型计算的，而准静态模型忽略了人体的动力学，因此可能是错误的。这项研究调查了在行业中普遍使用的人工物料组合处理任务期间，使用动态模型与拟静态模型对脊柱负荷的不同影响。进行了一项实验，涉及9名男性和9名女性参与者，针对不同的箱子质量和架子高度执行了总共3402个箱子运输任务（搬运，搬运和存放）的循环。使用运动捕捉数据，使用3D动态和准静态模型计算作用在L5 / S1关节上的峰值和累积力矩。