Smart Materials and Structures with Hybrid Nonlinear Vibration Control for Marine Applications

1. Fluid Structure Interactions Research Group Smart Materials and Structures with Hybrid Nonlinear Vibration Control for Marine Applications Guanghong Zhu gz1e11@soton.ac.uk Supervisors: Dr. Yeping Xiong, Prof. Steve Daley and Prof. R. A. Shenoi Faculty of Engineering and the Environment • Motivation • For passenger ships (Figure 1), vibration and noise pollutions affect the comfort of passengers and crew members. • Vibration and noise generated by marine engines create pollutions, which harm the marine life and become one of the environmental problems. • New knowledge and technology need to be developed to address these problems by effectively controlling vibration transmission and acoustic noises. • Methodology • In order to further investigate dynamical properties of different MREs, it is necessary to perform multiple modes dynamic loading tests. • The nonlinear vibration theory considering the actual strain–stress relationship will be employed to establish mathematical model and predict the dynamic response of the MRE material and structure. • A hybrid passive/active vibration control system with adaptive MRE materials (Figure 3) will be investigated. • Nonlinear power flow approach will be developed to analyze the vibration energy transmission mechanism to evaluate the vibration control effectiveness. Figure 1 Passenger ship Background Figure 3 A schematic hybrid control system Programme Figure 2 MRE without magnetic field and MRE under magnetic field Aims Figure 4 Work programme Challenges • Nonlinear mathematical model of MRE materials and structures under multiple loading modes . • Develop the nonlinear power flow approach to analyse the energy transmission mechanism of the smart nonlinear dynamical systems. • Develop hybrid active/passive control system to effectively control vibration energy transmissions. FSI Away Day 2012 Acknowledgement: