Study of the temperature rise induced by a focusing transducer with a wide aperture angle on biological tissue containing ribs

We used the spheroidal beam equation to calculate the sound field created by focusing a transducer with a wide aperture angle to obtain the heat deposition, and then we used the Pennes bioheat equation to calculate the temperature field in biological tissue with ribs and to ascertain the effects of rib parameters on the temperature field. The results show that the location and the gap width between the ribs have a great influence on the axial and radial temperature rise of multilayer biological tissue. With a decreasing gap width, the location of the maximum temperature rise moves forward; as the ribs are closer to the transducer surface, the sound energy that passes through the gap between the ribs at the focus decreases, the maximum temperature rise decreases, and the location of the maximum temperature rise moves forward with the ribs.

基于Grasshopper及Rhino-inside插件的纵肋叠合剪力墙参数化快速建模

结构工程师在装配式的项目中,需要绘制竖向构件的详图,在目前能够绘制构件详图的软件中,并没有针对纵肋叠合剪力墙新体系的模块,此项工作耗费了很多精力,故考虑将参数化建模与装配式相结合。在BIM参数化研究中,多为幕墙和网壳结构的建模应用,在构件层面的应用较少。本文利用Grasshopper,调整少量参数,实现快速建模,通过Rhino-inside插件,建立Rhino和REVIT软件之间的联系,将犀牛软件中的模型转换为REVIT模型。实现快速绘制纵肋叠合剪力墙的构件详图,并将构件的信息参数化,可视化,传递给构件厂,便于预制构件的深化和生产,全过程节省了很多人力,大大提升了效率,为装配式新体系的构件生产提供参考。

月牙肋钢岔管结构优化及联合承载机理研究

运用ANSYS软件的APDL语言,提出埋藏式对称Y形月牙肋钢岔管的参数化有限元分析方法。该方法集岔管建模、网格自动划分和加载求解为一体,不仅可对钢岔管进行体形设计与优化,而且方便对影响钢岔管与围岩联合承载比例的各因素进行敏感性分析。以某抽水蓄能电站岔管为例对方法进行了验证,结果表明该方法能节省大量工作、提高工作效率,具有较大的实用价值。