Navigation and Control Technology Research Institute of China North Industries Group Corporation
目的 在显式动力学计算理论基础上,提出了一种适用于肌肉高应变率下主被动特性数值计算模型。方法 在计算肌肉单元高应变率下运动方程的过程中,于每一时间步计算节点力公式中引入了高应变率下的Hill肌肉三元素计算模型,对每一时间步的节点力进行修正。结果 由于在数值计算过程中引入了Hill肌肉三元素模型,使得肌肉单元具有了一般结构本构模型的被动特性和其专有的主动特性。结论 研究结果将有助于对肌肉高应变率下的动力学响应和损伤问题进行数值计算。
Objective On the basis of explicit dynamics calculation theory, a numerical model for calculating the active and passive properties of muscle with high strain rate was proposed. Method In the process of calculating the motion equation of muscle element with high strain rate, hill’s three factors muscle model with high strain rate is introduced into the formula of calculating noda force to modify the node force in each time step. Results As hill’s three factors muscle model was introduced in the numerical calculation, the muscle element has the passive characteristic of the general structural constitutive model and its proprietary active characteristic. Conclusion The results of this study will be helpful to investigate the dynamic response and damage of muscle under high strain rate.