Research on Initial Imperfections in Corrugated Diaphragm based on Finite Element Method
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摘要: 波纹膜片作为压力传感器中重要的弹性敏感元件,其物理性能直接影响压力传感器的线性度、灵敏度及稳定性等性能。文章基于ANSYS有限元分析软件,对波纹膜片进行特征值屈曲分析,取其一阶屈曲模态作为初始几何缺陷,并对是否考虑初始缺陷的波纹膜片模型进行静力分析。有限元分析结果表明,与未引入初始缺陷相比,采用一阶屈曲模态作为初始缺陷可得到更小的位移量和最大应力值,这对波纹膜片的设计分析具有重要意义。Abstract: As an important elastic sensitive component in pressure sensors, the physical performance of corrugated diaphragm will directly affect the linearity, sensitivity, and stability of pressure sensors. In this article, based on the ANSYS finite element analysis software, the eigenvalue buckling analysis is performed on the corrugated diaphragm. Taking their first-order buckling mode as the initial geometric imperfection, static analysis is conducted on the corrugated diaphragm model with or without considering the initial imperfection. The finite element analysis results show that compared to not introducing initial imperfections, using the first-order buckling mode as the initial imperfection can obtain smaller displacement and maximum stress value, which is of great significance for the design and analysis of corrugated diaphragm.
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Keywords:
- corrugated diaphragm /
- initial imperfection /
- buckling analysis /
- ANSYS
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