悬臂梁
动力学(音乐)
机械
物理
结构工程
经典力学
工程类
数学
声学
作者
Wei Chen,Kun Zhou,Lin Wang,Zhouping Yin
标识
DOI:10.1016/j.jsv.2022.117074
摘要
• A new geometrically exact model of fluid-conveying curved pipes is established. • Dynamical behavior of the curved pipe can be well predicted by the GE model. • The curved pipe may undergo large-amplitude deformation due to fluid excitation. • The curved pipe vibrates periodically with sufficiently high flow velocity. Fluid-conveying flexible pipes are widely used in the fields of soft robots and biological medicine. In recent years, considerable progress has been made in investigating the dynamics of initially straight pipes. However, due to the lack of effective theoretical models for flexible pipes undergoing large deformation, the mechanism governing the dynamics of curved pipes conveying fluid is still unclear. In this work, a geometrically exact (GE) model of fluid-conveying flexible pipes with arbitrary initial configuration is established. The validation of this new theoretical model and the employed numerical algorithm is conducted by comparing the current results with that based on the absolute nodal coordinate formulation (ANCF). Based on this GE model, the static deformation, stability and nonlinear vibration of a semi-circular pipe are systematically studied. It is shown that the large-deformation behaviors of the flexible curved pipe can be well predicted by the newly developed GE model. In addition, the effects of mass ratio, flow velocity and gravity parameter are discussed, and some conclusions are drawn. The proposed theoretical model and simulation results for large deformation of fluid-conveying curved pipes are also expected to be useful in the prediction, design and control of the dynamical behavior of various initially curved pipes in practical engineering.
科研通智能强力驱动
Strongly Powered by AbleSci AI