生物软组织是一种具有非线性(nonlinearity)、各向异性(anisotropy)、近似不可压缩性(quasi-incompressibility)、黏弹性(viscoelasticity)等特性的弹性体材料,对于人体软组织实时形变行为的建模与仿真是当前虚拟手术仿真系统(virtual s...生物软组织是一种具有非线性(nonlinearity)、各向异性(anisotropy)、近似不可压缩性(quasi-incompressibility)、黏弹性(viscoelasticity)等特性的弹性体材料,对于人体软组织实时形变行为的建模与仿真是当前虚拟手术仿真系统(virtual surgery simulation)研究中的难点和热点之一。本文就目前虚拟手术系统中描述软组织实时形变模型(deformable models)的研究现状进行了分析与总结,并就未来的发展方向进行展望。展开更多
This study presents a comprehensive full dynamic model designed for simulating liquid sloshing behavior within cylindrical tank structures. The model employs a discretization approach, representing the liquid as a net...This study presents a comprehensive full dynamic model designed for simulating liquid sloshing behavior within cylindrical tank structures. The model employs a discretization approach, representing the liquid as a network of interconnected spring-damper-mass systems. Key aspects include the adaptation of liquid discretization techniques to cylindrical lateral cross-sections and the calculation of stiffness and damping coefficients. External forces, simulating various vehicle maneuvers, are also integrated into the model. The resulting system of equations is solved using Maple Software with the Runge-Kutta-Fehlberg method. This model enables accurate prediction of liquid displacement and pressure forces, offering valuable insights for tank design and fluid dynamics applications. Ongoing refinement aims to broaden its applicability across different liquid types and tank geometries.展开更多
文摘生物软组织是一种具有非线性(nonlinearity)、各向异性(anisotropy)、近似不可压缩性(quasi-incompressibility)、黏弹性(viscoelasticity)等特性的弹性体材料,对于人体软组织实时形变行为的建模与仿真是当前虚拟手术仿真系统(virtual surgery simulation)研究中的难点和热点之一。本文就目前虚拟手术系统中描述软组织实时形变模型(deformable models)的研究现状进行了分析与总结,并就未来的发展方向进行展望。
文摘This study presents a comprehensive full dynamic model designed for simulating liquid sloshing behavior within cylindrical tank structures. The model employs a discretization approach, representing the liquid as a network of interconnected spring-damper-mass systems. Key aspects include the adaptation of liquid discretization techniques to cylindrical lateral cross-sections and the calculation of stiffness and damping coefficients. External forces, simulating various vehicle maneuvers, are also integrated into the model. The resulting system of equations is solved using Maple Software with the Runge-Kutta-Fehlberg method. This model enables accurate prediction of liquid displacement and pressure forces, offering valuable insights for tank design and fluid dynamics applications. Ongoing refinement aims to broaden its applicability across different liquid types and tank geometries.
