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压电阀

由于压电阀响应速度快且工作时静音,因此常用于医学和实验室。其运行方式尽管非常高效节能,但仍会产生少量热量,而这一点在医学和实验室这种应用中往往很重要。 此模型显示如何在 COMSOL 中对压电阀建模。这个阀通过堆叠的压电驱动器驱动。当驱动器驱动阀打开时会压缩一个超弹性密封圈,本例对其中的接触进行建模。 此模型需要“非线性结构材料”模块。

预应力微镜

此模型显示如何设置和求解预应力平板微镜在可控静电作用下的提升,并通过参数化研究分析了多大的预应力变化会产生位移。

压电速率陀螺仪

此模型显示如何分析基于音叉的压电速率陀螺仪。直接压电效应用来驱动平面内的音叉模态。这个模态通过 Coriolis 力耦合到面外模态,得到可由逆压电效应测得的面外运动。所设计的音叉几何可使其附近模态的特征频率在频率空间分离。计算了系统的频率响应,以及旋转速度的敏感性。

Radially Polarized Piezoelectric Transducer

This tutorial model shows how a user-defined coordinate system can be used to create any type of directional polarization of a piezoelectric material. ...

压电陶瓷管

此模型对压电驱动器进行二维轴对称静态分析。模拟了径向极化的压电陶瓷管在两组不同边界条件下的差异。第一种情况描述反压电效应,第二种情况显示正压电效应。此模型基于 S. M. Peelamedu 等人的论文 (Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering March 1, 2000 vol. 214 no. 2 87-97)。

Simulation of RF Tissue Ablation

This example exemplifies how to model tissue ablation through applying RF radiation. A more detailed description of the phenomenon, and the modeling process, can be seen in the blog post "[Study Radiofrequency Tissue Ablation Using Simulation](https://www.comsol.com/blogs/study-radiofrequency-tissue-ablation-using-simulation/)".

Applying a Current-Voltage Switch to Models

This example exemplifies how to model the switching between current and voltage excitations in *Terminal* boundary conditions. A more detailed description of the phenomenon and the modeling process can be seen in the blog post "[Control Current and Voltage Sources with the AC/DC Module](https://www.comsol.com/blogs/control-current-and-voltage-sources-with-the-acdc-module/)".

Generation of Random Surfaces

These examples demonstrate how to generate randomized geometric surfaces. The {:comsolmph} software provides a powerful set of built-in functions and ...

盘式谐振器的锚损耗

本例显示如何计算一个钻石盘式谐振器中的锚损受限品质因子。谐振器通过多晶硅柱锚接在基板上,功率通过该柱传递到基板。使用完美匹配层来表征无限大的基板。此模型基于 2007 年在法国格勒诺布尔举办的 COMSOL 用户年会分会场用户论文 (P. Steeneken "Parameter Extraction and Support-Loss in MEMS Resonators", COMSOL Users Conference 2007, Grenoble)。

Adhesion and Decohesion of Indenting Ball

A steel ball is pressed down against a rubber membrane. When the contact pressure exceeds a certain value, the two parts start sticking together. When the ball is retracted, the membrane is pulled upwards in the bonded region. During the retraction, the bond is partially broken. This happens when the stresses exceed the limits specified in the decohesion law.