人體頭頸部模型肌肉主動(dòng)力反饋控制研究
[Abstract]:In all kinds of traffic accidents, the head and neck of human body is the most vulnerable to injury, often serious or fatal injury. The head and neck injuries cause the injured to be affected by sequelae for a long time, even lose their ability to live, and cause huge economic burden and mental loss to the society and individuals. It is of great significance to study the injury mechanism and protection technology of head and neck in traffic accidents. The digital model of head and neck is an important method to study the damage mechanism and protection of head and neck in automobile collision. The purpose of this paper is to establish a finite element model of human head and neck with self-adaptive ability and higher biological fidelity, and verify it before and after collision. The model was used to study the effect of the main force of the neck muscle on the dynamic response of the head and neck and the neck injury. In this paper, the mechanism of head and neck injury and its kinematics theory, anatomical knowledge of head and neck, bone and muscle microbiomechanics and its constitutive model are summarized. Aiming at the shortcomings of the existing finite element model of head and neck, it is further improved. According to the neuromuscular control theory, the classical control theory and the properties of Hill muscle material, the main dynamic control scheme of head and neck muscles was developed, and the control program was written by LS-DYNA keyword. The control of the head and neck model is realized on the finite element software platform. Finally, the effectiveness of the head and neck model with muscle dynamic control is verified under the condition of front and rear impact, and the head and neck model with the addition of main dynamic control is applied to the post impact model. To study the effect of muscle force on the kinematic response of head and neck and head and neck injury in rear-end collision. The results show that the model of head and neck with muscle main power control is in good agreement with the experimental data of volunteers in the simulation of rear impact, and the curve of activation grade obtained by feedback control has a good delay. According to the different states of head and neck under different collision conditions, the corresponding activation level can be outputted, and the adaptive ability of the finite element model of human head and neck can be improved. The research on post-impact damage of hybrid dummy shows that under the same impact intensity, the damage index values of the main dynamic model are lower than that of the dynamic model, and the effect of muscle main force is obvious, which can effectively reduce the risk of head and neck injury.
【學(xué)位授予單位】:湖南大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:U467.14
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