输流管道流固耦合系统非线性动力学特性及动态机械失效预测与控制

项目名称： 输流管道流固耦合系统非线性动力学特性及动态机械失效预测与控制

项目编号： No.51275315

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 包日东

作者单位： 沈阳化工大学

项目金额： 75万元

中文摘要： 以非特定边界条件和非正常工况的壳模型为基础的输流管道流固耦合系统为研究对象，通过理论求解、数值仿真和模型试验，研究系统在非特定边界条件下的非线动力学特性，研究系统在振动、腐蚀和磨损等非正常条件下动态机械失效的预测和系统的非线性振动主动控制。阐明输流管道流固耦合系统壳模型在非特定边界条件下的分岔与混沌的解析方法和仿真分析方法，揭示系统的非线性动力学特性，获得系统在各种非正常条件下的动态机械失效规律，以及与可靠性的相互关联与作用机制，建立管道系统非线性控制模型，实现管道系统非线性振动主动控制。为工程实际中管道系统的主动控制、为动态机械失效的预测和控制提供坚实的理论基础，为发展高维非线性动力学的分岔和混沌理论做一些探求。

中文关键词： 输流管道；流固耦合；非线性特性；动力稳定性；非线性控制

英文摘要： The study object of this project is the fluid conveying pipe that is treated as shell model under the condition of nonspecific boundary condition and improper operating condition, which the fluid structure interaction is under discussed. By means of theoretical analysis, numerical simulation and model test, the research object include three aspects: the systematical nonlinear dynamical characteristics under the nonspecific boundary conditions; dynamic failure forecast of system under the improper conditions such as vibration, corruption and abrasion; active control of nonlinear vibration. The purpose of the project is to elucidate theoretical methods and simulation analytic techniques for studying the fluid conveying piping system, to illustrate its nonlinear dynamic characteristics, to acquire dynamic failure regularities of system under different kinds of improper conditions and the actional mechanism relative with reliability, to establish nonlinear control model for the piping system to carry out its active control. The results of this project can provide consistent theoretical basis for the active control of piping system used in engineering practice and for the dynamic failure forecast and control, can develop the higher dimensional nonlinear dynamics theory.

英文关键词： fluid conveying pipe；fluid structure interaction(FSI)；nonlinear characteristics；dynamic stability；nonlinear control