【摘要】 为了研究管道内检测器运行时的非线性动力学特性,基于耦合欧拉-拉格朗日(CEL)方法,建立了管道内检测器运行的流-固耦合模型,采用Mooney-Rivlin模型描述橡胶皮碗超弹性、非线性行为。对内检测器在管内运行经过管道局部变形时的复杂行为进行求解和分析,获取了管道内检测器的速度、加速度、压力差、接触面积、摩擦力曲线以及最大应力和真实应变图,对内检测器皮碗非线性动力学特性进行分析。在计算中考虑了检测器的惯性影响以及摩擦力的作用,使得该流-固耦合模型更加接近现实工况,可对优化内检测器结构设计和使用提供理论依据和参考。更多还原

【Abstract】 In order to study the nonlinear dynamic characteristics of the detector in the pipeline, based on the coupled Eulerian Lagrangian(CEL) method, the fluid structure coupling model of the detector in the pipeline is established, and the Mooney Rivlin model is used to describe the super elastic and nonlinear behavior of the rubber cup. The complex behavior of the detector in pipeline after local deformation was solved and analyzed.The velocity, acceleration, pressure difference, contact area,friction curve, maximum stress and real strain diagram of the detector cup in the pipeline are taken to analyze the nonlinear dynamic characteristics of the detector cup. The inertia effect of the detector and the effect of friction are considered in the calculation, which makes the fluid structure coupling model closer to the physical reality, and provides a theoretical basis and reference for optimizing the structure design and use of the inner detector.更多还原