学术报告通知二则
报告题目1:Surface and interface elastic waves in phononic crystals and metamaterials
报告人1:Chuanzeng Zhang (University of Siegen, Germany)
报告时间1:2018年8月20日15:00-16:00
报告题目2:周期结构中的波及其调控
报告人2:陈伟球教授(浙江大学)
报告时间2:2018年8月20日16:00-17:00
报告地点:A18-807
主办单位:国际合作处、科协、机械结构力学及控制国家重点实验室、航空宇航学院
报告1摘要:
Surface/interface waves at the interface of two dissimilar media play an important role in science and technology, as they exhibit rich physics and potential applications in both optical and acoustic systems. One type of such surface/interface wave modes can be observed at the interface between dissimilar photonic crystals or metamaterials. The interface elastic wave mode is the elastic analog of its optical and acoustic counterparts. However, compared with the optical and acoustic systems, the investigations of the surface/interface elastic waves in phononic crystals and elastic metamaterials are quite limited and rarely reported in literature. In this talk, the surface/interface elastic waves propagating along the interfaces between a semi-infinite homogeneous background medium and a semi-infinite phononic crystal or elastic metamaterial will be presented. Numerical examples demonstrate that the surface/interface elastic waves decay rapidly into the phononic crystal (elastic metamaterial) or the homogeneous medium, and can be tuned by changing the geometrical configuration of the interfaces. A cavity which can confine the interface elastic waves is proposed. It is shown that the interface wave mode cavity can couple with other bulk wave modes, which may provide a new way for designing integrated phononic circuits. Moreover, the interface elastic waves can be utilized in many challenging applications, such as energy harvesting, sensing and collimation.
报告人1简介:
张传增教授现任德国锡根大学教授、南京航空航天大学客座教授、欧洲科学院院士。国际著名力学专家。
声子晶体和超材料的研究已持续了近30年,但仍不断有新的成果涌现。本报告将汇报3个方面的研究进展:1)软材料周期结构的变形及其对波的调控;2)介电软材料声子晶体可调性能的解析研究;3)基于梯度材料的线性声学二极管的设计。上述研究都非常初步,但可以揭示一些可能有重要应用或启示的现象或结果。
报告人2简介:
陈伟球,1969年出生于江苏吴江。1990、1996年分别于浙江大学获学士和博士学位,毕业后留校工作至今。现为浙江大学航空航天学院工程力学系教授。主要研究方向包括智能材料和结构力学、多场耦合力学、软物质力学、结构的振动与波动等。参与撰写中文专著1部、英文专著3部,在国内外专业期刊上发表论文300余篇,全部论著SCI他引接近6000次。2007年获国家杰出青年基金资助,2016年初入选教育部长江学者奖励计划。目前任中国力学学会常务理事、对外交流与合作工作委员会主任委员,《力学学报》、《中国科学 物理 力学 天文学》、《科学通报》、《Mechanics of Advanced Materials and Structures》、《Composite Structures》等十余个国内外期刊的编委或副主编。