目的：利用中国数字人工程获得的冷冻人体切片数据，建立虚拟人技术仿真平台，为人体骨肌系统生物力学及相关应用研究提供基础计算平台服务。方法：首先通过课题组自行开发的医学图像处理软件CryoSegmentation，对中国数字人工程男一号的冷冻切片图像序列进行配准、特征点和轮廓线的提取等处理。然后利用逆向工程软件Imageware建立虚拟人体的面模型。其次基于Hamilton动力学理论，建立虚拟人体运动学与动力学方程；并结合人体运动捕捉系统，在Mircrosoft Visual Studio2005环境下，开发虚拟人运动学与动力学计算模块。最后，根据人体骨骼的材料属性和力学特性，建立了虚拟人全身骨骼系统的有限元模型。结果：通过对一名志愿者进行的步态实验，获得了该志愿者的计算机虚拟模型，捕捉到步态实验中人体各关节的运动学参数，通过动力学模块的计算，得到了步态中人体各关节的受力情况。通过对步态中股骨的有限元计算，得到了志愿者行走中股骨所受的应力云图。结论：基于数字人技术的人体骨肌系统生物力学计算平台能够对人体进行生物力学仿真和计算，从而得到人体运动过程中准确的力学参数，为临床骨科医学、人体工效学、体育与艺术运动、军事医学等相关学科的应用研究提供参考依据。%Objective:The virtual human simulation platform was developed based on the frozen cadaver slices datasets from Chinese digital human project, which could provide human musculoskeletal biomechanics simulation and calculation services for human musculoskeletal biomechanics and other related researches. Methods: First, the frozen cadaver slices were processed by our software CryoSegmeantation. Then, the virtual human anatomical surface models were reconstructed via inverse engineering software Image ware. Second, based on the Hamilton dynamical theory, the kinematics and kinetics algorithms of virtual human were deduced. And the corresponding software was developed under Microsoft Visual Studio 2005 environment. At the end, according to the human skeletal bone’s material and mechanical properties, the finite element models of virtual human were developed. Results:Through the subject gait experiment, the virtual human platform was validated. The virtual human model of subject was constructed;the kinematics and kinetics parameters during subject walking were calculated. The micro-stress of tibial bone was also gained from the finite element model of subject. Conclusion: The virtual human technology could simulate the human behavior and calculate the biomechanical parameters during human movement. It is important for the related studies such as clinical orthopaedics, ergonomics, physical and sports art, military medical science and so on.
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