Fluid-conveying nanotubes have become important components of nanoelectromechanical systems (NEMS) working in fluid environments, exciting extensive research on the dynamics of flow-conveying nanotubes. This paper systematically reviews the research progress of mechanics of fluid-conveying nanotubes from several aspects, including tube displacement field, non-classical continuum theory models, modeling, governing equations, boundary condition treatments, and dynamic behaviors. First, a refined displacement field for the tube structure considering curvature nonlinearity is presented. Based on the generalized continuum theory, a size-dependent constitutive model of nanotubes is established that fully considers surface effects, non-local stress and strain gradient effects, as well as the slip flow model for modeling the size-dependency of nanofluid is derived. Subsequently, three types of planar nonlinear vibration problems related to boundary conditions of flow-conveying nanotubes are reviewed. Based on the different nonlinear characteristics caused by different boundary conditions, including curvature nonlinearity, inertia nonlinearity, boundary tension hardening nonlinearity, etc., corresponding assumptions are made and size-dependent longitudinal internal force-displacement relationship is established. The dynamic governing equations and classical and non-classical boundary conditions of flow-conveying nanotubes are derived based on the Hamiltonian variational principle. The current main treatment methods for non-classical boundary conditions are illustrated. Finally, the research status of mechanical behaviors of fluid-conveying nanotubes is reviewed and future research prospects are summarized. This article provides theoretical guidance for linear/nonlinear design of NEMS of next-generation working in fluid environments.

流体输送纳米管已成为在流体环境中工作的纳米机电系统 (NEMS) 的重要组成部分，激发了对流体输送纳米管动力学的广泛研究。本文从管位移场、非经典连续介质理论模型、建模、控制方程、边界条件处理和动力学行为等几个方面系统综述了流体输送纳米管力学的研究进展。首先，提出了考虑曲率非线性的管结构的精细位移场。基于广义连续介质理论，建立了充分考虑表面效应、非局部应力和应变梯度效应的纳米管尺寸相关本构模型，以及滑流模型进行建模导出了纳米流体的尺寸依赖性。随后，回顾了与流动纳米管边界条件相关的三类平面非线性振动问题。根据不同边界条件引起的不同非线性特性，包括曲率非线性、惯性非线性、边界拉硬化非线性等，做出相应假设，建立与尺寸相关的纵向内力-位移关系。基于哈密顿变分原理推导了流动纳米管的动态控制方程以及经典和非经典边界条件。阐述了目前非经典边界条件的主要处理方法。最后，对流体输送纳米管力学行为的研究现状进行了综述，并对未来的研究前景进行了展望。本文为下一代流体环境NEMS的线性/非线性设计提供理论指导。