CAJ | 학술논문

激光以其优异的性能广泛应用于医学和军事领域。为有效防护激光过度损伤，需研究激光与生物组织的热作用机理。本文分析了激光与生物组织作用的热传递数学模型，讨论了组织的边界条件，建立了皮肤生物组织的三层有限元网格模型，给出了采用ANSYS软件进行组织温度场求解的流程，数值仿真研究了不同功率脉冲激光在皮肤组织内部产生的温度场特性，得出了组织内部不同径向长度、轴向深度在不同时刻下的温度场变化趋势。结果表明，激光功率几何倍增时，组织内部的最大温升呈几何倍增趋势；条件一定时，组织温升区域不随激光功率变化而变化。随着激光功率增加，生物组织表层温度变化的剧烈程度增大，而内部温度变化的剧烈程度较小，且随着轴向深度增加，组织内部温度逐渐呈线性趋势。
격광이기우이적성능엄범응용우의학화군사영역。위유효방호격광과도손상，수연구격광여생물조직적열작용궤리。본문분석료격광여생물조직작용적열전체수학모형，토론료조직적변계조건，건립료피부생물조직적삼층유한원망격모형，급출료채용ANSYS연건진행조직온도장구해적류정，수치방진연구료불동공솔맥충격광재피부조직내부산생적온도장특성，득출료조직내부불동경향장도、축향심도재불동시각하적온도장변화추세。결과표명，격광공솔궤하배증시，조직내부적최대온승정궤하배증추세；조건일정시，조직온승구역불수격광공솔변화이변화。수착격광공솔증가，생물조직표층온도변화적극렬정도증대，이내부온도변화적극렬정도교소，차수착축향심도증가，조직내부온도축점정선성추세。
Laser is widely applied in military and medicine fields because of its excellent capability. In order to ef-fectively defend excess damage by laser, the thermal processing theory of skin tissue generated by laser should be car-ried out. The mathematics model of bio-tissue heat transfer that is irradiated by laser is analyzed. And boundary condi-tions of bio-tissue are discussed. Three layer FEM grid model of bio-tissue is established. The solving flow of temper-ature in tissue is given by adopting ANSYS software. The temperature distribution characteristic of skin tissue gener-ated by different power pulse laser is numerical simulated. The different times temperature change trend in different radial length and axis depth skin tissue is educed. The results show that the biggest temperature ascend in bio-tissue is increasing geometry doubly with the laser power increase geometry doubly. When the conditions are the same, the ar-ea of temperature ascend in bio-tissue doesn’t change with laser power changing. The acuity degree of temperature change on the surface layer bio-tissue increase with laser power increasing. But the acuity degree of temperature change inner bio-tissue is less. The temperature in bio-tissue assume linearity trend with axis depth increasing.