Generation of postured voxel-based human models for the study of step voltage excited by lightning current

[摘要] With the development of medical technique and computationalelectromagnetics, high resolution anatomic human models have already beenwidely developed and used in computation of electromagnetic fields inducedin human body. Although these so called voxel-based human models arepowerful tools for research on electromagnetic safety, their unchangeablestanding posture makes it impossible to simulate a realistic scenario inwhich people have a lot of different postures. This paper describes a poserprogram package which was developed as an improved version of the free-fromdeformation technique to overcome this problem. It can set rotation anglesof different human joints and then deform the original human model to makeit have different postures. The original whole-body human model can bedeformed smoothly, continuity of internal tissues and organs is maintainedand the mass of different tissues and organs can be conserved in areasonable level.

As a typical application of the postured human models, this paper alsostudies the effect of the step voltage due to a lightning strike on thehuman body. Two voxel-based human body models with standing and walkingposture were developed and integrated into simulation models to compute thecurrent density distribution in the human body shocked by the step voltage.In order to speed up the transient simulation, the reduced c technique wasused, leading to a speedup factor of around 20. The error introduced by thereduced c technique is discussed and simulation results are presented indetail.

[学科分类] 电子、光学、磁材料