题  目：Folding Thick Panels Using Origami 基于折纸工艺的厚板折叠

时  间：2021年07月13日16：00－17：00

地  点：腾讯会议 ID：668 149 724（若300人满请入直播间）

腾讯直播间：https://meeting.tencent.com/l/ebgPOu5g438i 

报告人：Zhong You由衷教授（英国牛津大学）

由老师官方主页：https://eng.ox.ac.uk/people/zhong-you/ 

欢迎广大师生参加！

                            土木与交通学院

                                                                                    2021年07月12日

报告人简介：

由老师目前是牛津大学工程学院的教授。他曾先后在上海交通大学获得学士学位，在大连理工大学获得硕士学位，剑桥大学获得博士学位。现阶段，由老师致力于新型可展开结构设计的研究。新型可展开结构是一种非传统的结构，能够实现较大的几何形状变化。他专注于研究控制这些结构几何大变形的基本原理和增强它们机械性能的方法，并在《Science》等著名期刊上发表多篇文章。由老师目前的研究还侧重于可用在微创手术上的可展开结构和机构、折纸结构和可展开的医疗设备。由老师的研究工作曾入选英国白金汉宫的Science Day 展览，该展览旨在展示英国科学研究的最新水平。《Science》杂志在其精选摘要部分曾报道了由老师折纸结构的工作。此外，由老师还多次发起和组织关于折纸结构的学术会议，包括2018年的第七届OSME，目前是世界上最大的折纸研究人员和艺术家的研讨会。更多详情请参阅由老师官方主页：https://eng.ox.ac.uk/people/zhong-you/ 

Zhong You is currently a Professor of Engineering Science at University of Oxford. He obtained BS, MS and PhD from Shanghai Jiaotong University, Dalian University of Technology and University of Cambridge, respectively. His research is concerned with the design and realisation of novel deployable structures which are a type of unconventional structures capable of large shape changes. He is particularly interested in the underlying principles governing large geometrical transformations of these structures and ways to enhance their mechanical performances. He publishes extensively in prestigious journals such as Science. His current research focuses on deployable structures and mechanisms, origami structures and expandable medical devices for minimally invasive surgery. Zhong’s work was selected for the Science Day exhibition at the Buckingham Palace, which showcased the state-of-the-art of British scientific research. Science reported his research into origami structures in its profile section. He frequently chairs conferences on origami structures, including the 7th OSME in 2018, which is the largest gathering of origami researchers and artists in the world. 

报告摘要： 

   近年来，折纸这种传统的艺术形式，越来越多地受到了工程和科学界的关注。各类研究表明折纸结构的形成和各类可折叠结构的变形能力，可以进行地参数化设计，并应用于新功能结构和器件的开发中。与纸张相比，工程应用中大多数材料都相对具有一定刚性，它们的厚度很难被忽略，因此，我们特别专注了开发厚板折纸的方法。在本次演讲中，由老师将重点介绍厚板刚性板折叠的方法。在区分了薄板和厚板折叠的区别后，由老师将介绍一种等效方法，使厚板折叠在运动学上等同于零厚度的薄板。随后，由老师将介绍厚度均匀的厚板紧凑折叠，并提出一种基于Hamiltonian circuit的方法，该方法可以产生多个自由度的组装。开发单自由度折叠的方法也将紧随其后，从而产生一系列有趣的可展开构件。这些可展开结构可以用于大型航空航天的可展开结构，例如太阳能电池板和天线。这些结构需要紧凑地折叠起来才能发射，到太空后精确地展开部署。 

      Recently origami folding, a traditional art form of paper folding, has been of increasing interest to engineers. It has been found that the formation of origami structures and the shape change capability of some origami objects can be readily parameterised and applied to the development of new structures and devices. Since most of the sheet materials used in engineering applications are relatively rigid in comparison with paper, and they have non-negligible thickness, particular attention has been drawn on developing ways to fold these thick panels. 

       In this talk, I shall focus on methods of developing folding schemes for thick rigid panels. Starting by explaining the difference between folding a thin sheet and a thick panel, I shall introduce a method that enables folding of thick panels in a way which is kinematically equivalent to that of a zero-thickness sheet. Then I shall move to the compact folding of thick panels with uniform thickness. An approach based on the Hamiltonian circuit will be presented, which commonly results in multiple degrees of freedom assemblies. Methods to develop single degree of freedom folding will follow, which lead to a number of very interesting deployable assemblies. An immediate application of these structural concepts is for large aerospace deployable structures such as solar panels and antennas which need to be folded compactly for launch and subsequently deployed precisely in space.