CAJ | 학술논문

体外冲击波碎石机(Extracorporeal shock wave lithotripter,ESWL)是治疗结石的主要手段,现阶段对其微观工作机理、动态声场分布等问题的研究尚处于起步阶段.通过对ESWL声场的建模及仿真可以对上述性能的研究带来很大的帮助.应用非线性传播方程建立了ESWL声场的数学模型,并通过有限差分算法结合MATLAB软件的图形模块进行了数值仿真.模型不仅考虑了非线性的影响,还引入了衍射、和热粘性吸收对声波的作用,最大限度地与实际声场所受到的各种影响保持一致.仿真很好地反映出ESWL产生的高强度超声波传播的非线性及一些与线性声波传播显著不同的特性.对形象地了解ESWL声波的传播过程和ESWL反射罩优化设计有很好的参考价值.
체외충격파쇄석궤(Extracorporeal shock wave lithotripter,ESWL)시치료결석적주요수단,현계단대기미관공작궤리、동태성장분포등문제적연구상처우기보계단.통과대ESWL성장적건모급방진가이대상술성능적연구대래흔대적방조.응용비선성전파방정건립료ESWL성장적수학모형,병통과유한차분산법결합MATLAB연건적도형모괴진행료수치방진.모형불부고필료비선성적영향,환인입료연사、화열점성흡수대성파적작용,최대한도지여실제성장소수도적각충영향보지일치.방진흔호지반영출ESWL산생적고강도초성파전파적비선성급일사여선성성파전파현저불동적특성.대형상지료해ESWL성파적전파과정화ESWL반사조우화설계유흔호적삼고개치.
Extracorporeal shock wave lithotripsy (ESWL) is a primary means of calculus, and now the researches of its micro-mechanism, dynamic sound field distribution and other issues are still in infancy. Through modeling ESWL sound field and simulation, above-mentioned issues can be solved. Using nonlinear equations, a mathemati-cal model of ESWL's sound field is established through finite difference algorithms combined with MATLAB graphics software modules. The impact of non-linear property is taken into account, and the actions of the diffraction and the sticky heat absorption on sound waves are introduced, thus making the surroundings of the simulation be the same with the experiment . Results of the simulation are very good, they show different phenomena produced by the high-intensity ultrasound and differences between linear sound waves. This model can show how sound waves travel in ES-WL and improve understanding of ESWL. And it can help to get an optimize design of ESWL.