基于无网格SPH的软组织形变和力反馈

Deformation of Soft Tissue and Force Feedback Using the Smoothed Particle Hydrodynamics

以肝脏模型为例,对软组织形变和力反馈进行研究。提出采用无网格SPH方法模拟软组织形变和力反馈。SPH方法无网格依赖,自适应性好,与基于网格的算法相比具有更高的计算精度。与基于网格技术的质点—弹簧模型的模拟结果进行对比,验证了SPH方法的有效性。

We study the deformation and haptic feedback of soft tissue in virtual surgery based on a liver model. This paper introduces a kind of mesh-free method for deformation simulation of soft tissue and force computation based on smoothed particle hydrodynamics(SPH). SPH has features of mesh-less and self-adaption, which supply higher precision than methods based on meshes for force feedback computation. Compared with the simulation results of the mass-spring model based on meshes, the validity of the SPH method is verified.