基于有限元模型的流体管道应力应变特性仿真实验研究

Simulation Study on Stress and Strain Characteristics of Fluid Pipeline Based on Finite Element Model

通过测量管道外壁应力应变大小来间接获得管道内压力值在实际工程应用中具有重要意义。在理论分析的基础上,利用ANSYS Workbench分析软件,建立管道的壁厚、长度、内径和材质等参数各异的多种有限元仿真模型,详细分析管道在内压作用下,管壁的应力应变特性。仿真结果表明,管壁应力应变与管道内压和内径大小成线性关系、与壁厚成非线性关系、且与管道长度无关,此外,对于相同管道内压,管壁应变随管道材质不同而变化,但管壁应力却不受影响。该仿真实验的设计与研究为后续的传感器研制和非接触管内压力测量提供了坚实的理论基础和必要的数据支撑。

It is of great significance to obtain the pressure value indirectly in the pipeline by measuring the stress and strain of the outer wall of the pipeline. Based on the theoretical analysis, a variety of finite element simulation models with different parameters are established by using ANSYS Workbench, such as pipe wall thickness, pipe length, pipe diameter and pipe material. The stress and strain characteristics of the pipe wall are investigated under the effect of internal pressure in detail. The simulation results indicate that the stress and strain of the wall are linearly related to the internal pressure and the inner diameter of the pipe, but it has non-linear relationship with the wall thickness and has nothing to do with the pipe length. In addition, for the same pipe internal pressure, the strain of the wall varies with the pipe material, but the stress of the wall is not affected. The design and research of the simulation experiment provide a solid theoretical basis and data support for further sensor design and non-contact internal pressure measurement.