多场耦合作用下中心非直线重载轴系的振动机理及其优化设计研究

项目名称： 多场耦合作用下中心非直线重载轴系的振动机理及其优化设计研究

项目编号： No.51305070

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 李凌轩

作者单位： 东北大学

项目金额： 25万元

中文摘要： 针对中心非直线轴系在多场耦合作用下的振动机理研究尚不够充分的问题，本项目以弯管内腔辅助加工系统的中心非直线重载轴系为研究对象，采用非线性动力学、有限元、多场耦合理论、接触能量耗散理论在故障转子的碰摩、不对中、慢变等经典模型的基础上对受结构场-热场-流体场耦合作用的中心非直线重载轴系的精确建模技术、多场协同求解算法、多性能目标的结构优化设计方法、以及该系统的稳定性、可靠性、灵敏度等进行研究。 本项目中数值研究和现场试验穿插于理论研究的每一个步骤，项目预期将探明多场耦合作用下中心非直线重载轴系的精确建模技术与多场协同求解方法，及其振动机理和时变规律；揭示结构场、热场、流体场的耦合作用机制；形成中心非直线重载轴系的结构优化设计理论。 项目预期成果将对弯管内腔、零部件的内弯道精加工的辅助加工系统的中心非直线轴系的设计提供理论依据，还对受热场与流体场作用下轴系的故障诊断、预防和治理具有重要的意义。

中文关键词： 非线性振动；加工；振动同步；；

英文摘要： Aiming at the inadequate studying of the vibration mechanism of the shafting with nonlinear axle center under multi-physics coupling, this project takes the heavy-load shafting with nonlinear axle of the bending tube cavity auxiliary processing system as our research object. The theory of nonlinear dynamics, the finite element, the multi-field coupling and the contact energy dissipation are used. Based on the classical models of the fault rotor rubbing, misalignment, slow-varying, etc, the accurate modeling technology, multi-physics collaborative solving algorithm and multiple performance objects structure optimization design method of the shafting with nonlinear axle are studied in the effect of the structure field, thermal field and fluid field coupling, as well as the system's stability, reliability, sensitivity, etc. In this project, each step of the numerical study and field test is interspersed in the theoretical research. It is expected to ascertain the accurate modeling technology of the shafting with nonlinear axle center in the effect of the multi-filed coupling, the multi-field collaborative solving algorithm and its vibration mechanism and time-varying rules; it is also expected to reveal the coupling mechanism of the structure, the thermal and the fluid field; to perfect the performance optimization

英文关键词： nonlinear vibration；machining；vibration synchronization；；