放射式冲击波在松质骨中传播的流固耦合模拟  

Fluid-Structure Coupling Simulation of Radial Shock Wave Propagation in Cancellous Bone

作　　者：何璐瑶 郭安忆 吴二军 王博[3] 刘青泉 刘亚军[1,2] 陈晓东[4] HE Luyao;GUO Anyi;WU Erjun;WANG Bo;LIU Qingquan;LIU Yajun;CHEN Xiaodong(Beijing Jishuitan Hospital Affiliated to Capital Medical University,Beijing 100035,China;Beijing Institute of Orthopaedic Trauma,Beijing 100035,China;School of Medical Technology,Beijing Institute of Technology,Beijing 100081,China;School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]首都医科大学附属北京积水潭医院,北京100035 [2]北京市创伤骨科研究所,北京100035 [3]北京理工大学医学技术学院,北京100081 [4]北京理工大学宇航学院,北京100081

出　　处：《北京理工大学学报》2024年第7期661-669,共9页Transactions of Beijing Institute of Technology

基　　金：北京市自然科学基金资助项目(L202011);北京市医院管理中心“登峰”计划专项经费资助项目(DFL20220401);北京积水潭医院院级科研基金资助项目(ZR-202207);国家自然科学基金资助项目(12272050,11772343)。

摘　　要：为探究放射式冲击波在多孔结构的松质骨及孔隙流体中的传播规律,建立了基于CT图像三维重建和不同骨体积分数的基于Voronoi设计的松质骨模型,以及放射式冲击波装置、软组织层、皮质骨和骨髓流体,应用有限元流固耦合方法进行显示动力学仿真分析.结果表明:该模型能够模拟放射式冲击波穿透软组织层在松质骨及孔隙流体中的传播特性.靠近皮质骨的松质骨区域受力明显,孔隙流体中也存在压力和流速变化.提高冲击波驱动压力和减小松质骨的骨体积分数,都会使骨小梁所承受的压力和有效应力增大,孔隙流体的受力和流速也随之增大.该结果为放射式冲击波对骨科疾病的有限元模拟提供了一种思路和方法,同时也为体外冲击波对骨科疾病的治疗提供了重要参考.In order to explore the propagation law of radial shock wave in porous cancellous bone and pore fluid,a cancellous bone model was established based on CT image 3D reconstruction and Voronoi tessellation design with different bone volume fractions,developing radial shock wave device,soft tissue layer,cortical bone and bone marrow,as well as carrying out display dynamics simulation analysis based on a finite element fluid-structure coupling method.The results show that the model can simulate the propagation characteristics of radial shock wave through soft tissue layer in cancellous bone and pore fluid.In the cancellous bone region near the cortical bone there is more evidence stress,and there are also changes of pressure and flow velocity in the pore fluid.Increasing the shock wave driving pressure and decreasing the bone volume fraction of cancellous bone will increase the pressure and effective stress of bone trabeculae,and the force and flow velocity of pore fluid will also increase.The results provide an idea and method for the finite element simulation of orthopedic diseases by radial shock wave,and also provide an important reference for the treatment of orthopedic diseases by extracorporeal shock wave.

关 键 词：放射式冲击波疗法 医用冲击波 松质骨 三维建模 流固耦合 

分 类 号：O39[理学—工程力学]