Title: Adaptive Tuned Dynamic Vibration Absorbs Working with Magnetorheological Elastomers
时间：7月24日16:10
地点：工科楼D341
Abstract:
Magnetorheological elastomers (MREs) have attracted notable credits in the development of smart devices due to their controllable stiffness and damping properties. For the purpose of effectively mitigating unwanted structural and/or machinery vibrations, the traditional MRE-based devices have been generally proven effective because the MR effect can increase the stiffness when the magnetic field is strengthened. This study presents a new MRE absorber that experienced reduced stiffness when the applied current was increased. This innovative work was accomplished by applying a hybrid magnet (electromagnet and permanent magnets) onto a multilayered MRE structure. To characterise this negative changing stiffness concept, a multilayered MRE isolator with a hybrid magnet was first designed, fabricated and then tested to measure its properties. Its vibration attenuation performance was experimentally evaluated. The extension of the work on the development of self-sensing and nonlinear MRE absorbers will also be discussed.
Short Biography:
李卫华，博士，澳大利亚卧龙岗大学先进制造研究中心主任，中国科学技术大学精密机械与精密仪器系国际客座教授。
分别于1992年与1995年在中国科技大学获得学士及硕士学位，并于2001年获得新加坡南洋理工大学博士学位。
自2003年起，在澳大利亚卧龙岗大学机械、材料及机电工程学院从事科研教学工作。
他的研究主要集中于智能材料及其应用、微流体、流变学以及智能机电一体化。他为九个国际学术期刊担任副主编或编辑委员工作。现已发表的期刊及会议论文超过300篇。曾被授予澳大利亚奋进奖学金（2011年），日本学术振兴会奖学金（2014年）及最佳论文奖。
