双曲形管聚声换能器对耳穴中辐射场的影响  

The radiation field of the acupoints in the ear induced by the transducer with hyperbolic pipe

作　　者：张丽蓉 李锦[1] 胡静[1] 凤飞龙[1] ZHANG Lirong;LI Jin;HU Jing;FENG Feilong(School of Physics and Information Technology,Shaanxi Normal University,Xi'an 710119,Shaanxi,China)

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2022年第6期69-76,共8页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(11974231,11774212);陕西省自然科学基金(2020SF-134)。

摘　　要：为明确超声作用过程中生物组织的物理场分布,基于管道声模态理论、Pennes生物热传导方程和弹性波动方程,计算了双曲形管聚声换能器在耳穴中产生的声场、温度场和应力场的分布情况,并将其与凹球面聚焦换能器对比。仿真结果表明:双曲形管聚声换能器在耳穴中的声场为细长纺锤形区域;其在耳穴中产生的声强、温升和应力随着换能器发射声压的增大而增大。双曲形管聚声换能器在耳穴中的声强分布较为平坦,当超声辐照时间大于10.52 s时,会引起皮肤-软骨界面处的温升更高,但其在耳穴中产生的应力较小。In the process of ultrasound application,it is very important to clarify the ultrasound field,temperature field and stress field distribution in biological tissues.Based on the acoustic mode theory of pipes,the Pennes biological heat conduction equation and elastic wave equation,the finite element method is used to simulate the ultrasound field,temperature field and stress field of the acupoints in the ear generated by the transducer with hyperbolic pipe.The transducer with hyperbolic pipe is compared with the concave spherical transducer.The results show that the ultrasound field of the acupoints in the ear induced by the transducer with hyperbolic pipe is a slender spindle-shaped area.The ultrasound intensity,temperature rise and stress of the acupoints in the ear increase with the increase of the emitted acoustic pressure of the transducer.In addition,the ultrasound intensity distribution of the acupoints in the ear induced by the transducer with hyperbolic pipe is relatively flat.Moreover,when the ultrasound irradiation time is more than 10.52 s,it causes higher temperature rise at the skin-cartilage interface and smaller stress in the ear.

关 键 词：双曲形管聚声换能器 耳穴 声场 温度场 应力场 

分 类 号：TB559[理学—物理]