鉴于科里奥利流量计基于振动原理进行流量测量，外部振动易对其测量结果产生严重干扰，开展系统研究以分析外部振动对该流量计的影响机制。利用双向流固耦合方法构建有限元仿真模型，并进行大量仿真分析，成功建立了外部振动与测量误差的数学模型，据此算出不同精度要求下的外部振动阈值。结果显示，该模型有效量化了外部振动频率、幅值等关键参数与测量误差的关联，为深入理解外部振动对流量计精度的影响机理提供了理论支持。该模型可用于评估不同工况下外部振动对流量计性能的影响，为现场安装和使用提供科学依据。

Given that Coriolis flowmeters measure flow based on vibration principles, external vibrations can significantly interfere with their measurement accuracy. The impact of external vibrations on Coriolis flowmeters was systematically investigated. A finite element simulation model was built in a bidirectional fluid-structure interaction approach, followed by series of simulation analyses. Based on the simulation results, a mathematical model was developed to describe the relationship between external vibration and measurement error, and then vibration thresholds for various accuracy requirements were calculated. The results show that the model effectively quantifies the correlation between key parameters of external vibration, such as frequency and amplitude, and measurement errors. This provides theoretical support for a deeper understanding of the impact mechanism of external vibrations on the accuracy of flowmeters. The model can be used to assess the effect of external vibrations on the performance of flowmeters under different operating conditions, offering scientific guidance for on-site installation and usage.