基于磁流变隔吸振系统的发动机宽频减振机理研究

项目名称： 基于磁流变隔吸振系统的发动机宽频减振机理研究

项目编号： No.11502038

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 陈世嵬

作者单位： 重庆科技学院

项目金额： 20万元

中文摘要： 针对目前发动机宽频减振的困境，本课题拟结合磁流变隔振系统的中频隔振优势以及磁流变吸振系统特定频段吸振优势，建立基于磁流变技术的智能发动机隔、吸振系统。通过将反映磁流变材料磁致效应的Bingham模型、频率相关性的分数导数MaxWell模型以及反映超弹性的Ogden模型结合，提出新的磁流变材料应力叠加本构模型，利用有限元仿真并结合发动机-车身耦合系统的刚体动力学分析，探索发动机智能隔吸振系统的力学机理；并研究考虑时滞效应的隔、吸振系统多目标最优-智能混合控制方法;以功率流传递率极小为目标函数，发动机自身振动烈度为约束条件，利用摄动有限元算法对吸振器、隔振器内部结构参数及其安装位置进行鲁棒优化；通过相似性分析，搭建发动机智能隔、吸振实验平台，验证并研究智能发动机隔吸振系统的优化和控制效果。通过本项目的研究，可为发动机振动主动控制理论研究以及磁流变隔吸振系统的设计提供新的方法和技术储备。

中文关键词： 振动控制；智能结构；非线性振动；发动机

英文摘要： Targeted the predicament of the active engine vibration isolation, this project, based on themagnetorheological, intends to design a new smart vibration reduction system, the systemCombined the advantages of isolator and absorber which has the adjustable stiffness and damping.In this study, a new Stress superposition model, which can reflecting theMagnetocaloric-Viscosity- Superelastic-Plastic effect of magnetorheological material, isestablished by combing the Boucwen model, fractional derivative Maxwell model and Ogdenmodel. Mechanical mechanism of the will be studied by using Finite Element Simulation.Consideration of Time Delay Response and ground incentive reverse pass-through effect the absorber – engine mounting system—car body nonlinear mechanical model is established for Studing the vibration isolation system of multi-objective hybrid control method. By defending Power flow transmission rate as the objective function and Engine vibration intensity as the constraints, the absorber and suspension’s Structural parameters should be robust optimized by use Perturbation method. The above control and optimization method should be verified through building the engine control isolation Experimental platform based on magneto-rheological technology. The new methods and technical reserves of the smart vibration reduction system should be founded through this research.

英文关键词： Vibration concrol;Smart Structures;Nonlinear Vibration;engine