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流体环境中静电微悬臂梁的多场耦合仿真分

, PP. 203-207

Keywords: 静电致动器,流固耦合,数值仿真,微机电系统

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Abstract:

微器件动力学特性通常受到周围粘性流体阻尼的强烈影响,在器件优化设计中,需要建立静电—结构—流体三场耦合模型才能细致考虑这些影响。为研究微开关在粘性流体介质中的动/静态特性和流体阻尼,建立以Navier-Stokes方程描述流体特性的静电微开关模型并进行数值分析;与相关文献结果比较验证了计算的正确性;得到了空气和去离子水介质中微开关的静/动态闭合电压、不同阶跃电压驱动下的闭合特性和流体阻尼力分布的情况。分析认为,微开关动/静态闭合电压的差异在介质粘性较大环境中较小,而在介质粘性较小环境中较大。

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