摘要
激光与人体皮肤组织相互作用的过程是军事、医疗等领域研究人员感兴趣的课题。基于激光与人体皮肤组织相互作用的二维轴对称有限元模型,在考虑人体皮肤组织血液灌注率和组织产热的条件下,通过温度耦合的方式,对生物传热方程和运动控制方程进行求解。利用有限元分析软件COMSOL MultiPhysics对三个纳秒激光脉冲照射皮肤组织的过程进行了数值模拟,得到了皮肤组织中的温度、位移和应力分布。由于本文脉冲激光的脉冲宽度为纳秒量级,小于皮肤组织的热迟豫时间,皮肤组织获得的热量来不及散失,脉冲激光照射近似于连续激光照射,又由于皮肤组织线弹性模拟的假设,故应力和位移呈持续增长模式。
The interaction between laser and human skin tissue is an interesting subject for researchers in military and medical fields. Based on the two-dimensional axisymmetric finite element model of the interaction between laser and human skin tissue, the bio-heat transfer equation and motion control equation are solved by temperature coupling method under the condition of considering the blood perfusion rate and heat production of human skin tissue. The finite element analysis software COMSOL Multiphysics was used to simulate the skin irradiated by three nanosecond laser pulses. The temperature, displacement and stress distribution in skin tissue were obtained. Because the pulse width of the pulsed laser is nanosecond, which is less than the thermal hysteresis time of the skin tissue, the heat gained by the skin tissue cannot be lost. The pulsed laser irradiation is similar to the continuous laser irradiation. Moreover, the stress and displacement of the skin tissue assume a continuous growth mode due to the hypothesis of linear elastic simulation.
作者
周波
战仁军
单宁
黄剑
ZHOU Bo;ZHAN Renjun;SHAN Ning;HUANG Jian(College of equipment management and support, Engineering University of PAP, Xi'an 710086, China)
出处
《激光杂志》
北大核心
2019年第4期145-148,共4页
Laser Journal
基金
陕西省科技计划面目项目(No.2016JM6043)
