Speakers Gallery

Biography：Ji Wang has been a Qianjiang Fellow Professor of Zhejiang Province at Ningbo University since 2002.  He also served as Associate Dean for Research and Graduate, School of Mechanical Engineering and Mechanics, Ningbo University, from 2013 to 2019.  Professor Ji Wang is the founding director of the Piezoelectric Device Laboratory, which is adesignatedKey Laboratory of the City of Ningbo.  Professor Ji Wang was employedat SaRonix, Menlo Park, CA, as a senior engineer from 2001 to 2002; NetFront Communications, Sunnyvale, CA, as a senior engineer and manager from 1999 to 2001; Epson Palo Alto Laboratory, Palo Alto, CA, as Senior Member of Technical Staff from 1995 to 1999.  Professor Ji Wang also held visiting positions at Chiba University, University of Nebraska-Lincoln, and Argonne National Laboratory.  He received his PhD and Master’s degrees from Princeton University in 1996 and 1993 and his bachelor’s from the Gansu University of Technology in 1983.  

Professor Wang has been working on acoustic wavesandhigh-frequency vibrations of elastic andpiezoelectric solids for resonator design and analysis withseveralUS and Chinese patents, over200 journal papers, and frequent invited, keynote, andplenary presentationsat major conferences aroundtheworld.  He has beenaboardmember,advisor, andconsultant to many leading companies inthe acoustic wave device industry.  Professor Wang has been a member of many international conference committees and currently serving the IEEE UFFC Technical Program Committees of the Frequency Control and Ultrasonics Symposia,the IEEE MTT-S, and the IEC TC-49.He is also thefounding chair oftheCommittee on Mechanics of Electronic and Magnetic Devices, CSTAM, and the SPAWDA.  Profess Wangwas the editor-in-chief ofStructuralLongevity and a member of editorial boards of severalinternational journals.

Title：A Measurement of Thin Film Properties with the RUSpec Method from Vibrations of Covered Elastic Cuboids

Abstract：In modern products from advanced manufacturing processes like semiconductor and electronic device industries, thin films are frequently utilized for essential functions such as conductive layers and functioning materials for various applications.  With sophisticated processing techniques, thin films can be coated on surfaces of various substrates with relatively thin thickness and desired planner patterns to satisfy application needs.  It is known that thin films are made from bulk materials by a phase transformation technology, and the large temperature variation will induce many changes related to the physical properties and material formation.  As a result, concerns about property changes in thin films are justified and should be addressed to support product development efforts. In this study, we start with a cuboid sample coated with thin films on faces.  The vibrations of such a coated cuboid are formulated with the Rayleigh-Ritz method as a layered structure.  With one set of displacement functions in the entire structure, strain and kinetic energies are calculated separately with the consideration of different material properties and sizes, providing the basis for the determination of unknown properties of materials through the frequency solutions.  By combining this analysis with the RUSpec technique, we can obtain the physical properties of the thin film layers based on the frequency variations.  With the advantages of easy-use and simple sample preparation, this will be a simple and accurate method for the evaluation of the physical properties of thin films which can be found in many applications today.

Prof. Yongkang Zhang, Guangdong University of Technology

张永康教授，广东工业大学

Biography：Yongkang Zhang, male, born in March 1963, is a professor and doctoral supervisor of the College of Mechanical and Electrical Engineering of Guangdong University of Technology He has been engaged in the research on anti fatigue manufacturing of high-end aviation and offshore equipment for a long time, and is committed to the anti fatigue design, low stress manufacturing, laser shockpeening, laser forging additive manufacturing and repair of deep-sea oil drilling platforms, ultra large offshore wind power installation platforms, deep-sea crude oil transfer equipment, aero-engine/aircraft structures, etc.. He has won one first prize of the National Science and Technology Progress Award, one second prize of the National Science and Technology Progress Award, two gold awards of Chinese Patent and one gold award of China's Good Design, and several first prizes of provincial and ministerial science and technology awards; 9 international patents and more than 140 Chinese major invention patents were authorized. He has published 380 academic papers and 4 monographs, including 1 English monograph; Publishing 3 textbooks; He was awarded the 70th Anniversary Medal of the founding of the People's Republic of China, the Special Allowance of the State Council, the Model Worker of Jiangsu Province and other honorary titles.

Title：Research on key manufacturing technology of core equipment for offshore wind farm construction

Abstract：China is vigorously developing offshore wind power, which is the national strategy of China to adjust the energy structure, reduce environmental pollution and achieve the "double carbon target". It is very difficult to install super-large wind turbines in the harsh environment of deep water with many typhoons, large wind waves, rapid velocity, many ice flows, complex seabed, long offshore distance and short annual construction time. The report introduces the research results of the design and manufacture of the core equipment for offshore wind farm construction for many years, and focuses on how to solve the following technical problems: the operation of the huge self-propelled jack-up installation platform is "easy to overturn and unstable", the lifting of the ultra-100-meter-long blade in the high wind is "easy to be misaligned", the single pile driving of the complex submarine giant wind turbine is "easy to be deflected and not straight", and the connection of the ultra-long submarine cable is "easy to be damaged and broken". This report introduces the technical innovation of the research results, a series of internationally leading ultra-large installation platforms, submarine cables and connection joints, international influence, application in the construction of famous offshore wind farms at home and abroad, and core patents obtained, etc.

Prof. Ruixiang Bai,Dalian University of Technology

白瑞祥教授，大连理工大学

Biography：Ruixiang Bai, Professor, Department of engineering mechanics, Dalian University of technology, doctoral supervisor, permanent member of State Key Laboratory of Structural Analysis for Industrial Equipment, Director of China Society for Composite Materials, "Hundred, Thousand and Ten Thousand Talents Project" in Liaoling province.The main research directions include micromechanical analysis and design of advanced materials, damage and bearing capacity of damaged engineering structures, dynamics and fault diagnosis of composite structures, analysis and numerical simulation of composite engineering structures, repair and strengthening mechanism of damaged engineering structures. He has presided over and participated in a number of major national projects and NSFC projects. In recent years, he has been responsible for more than 30 projects of failure behavior test and numerical simulation of composite structures in aerospace engineering such as national large aircraft and lunar exploration. Nearly 200 academic papers have been published, and more than 60 papers have been indexed by SCI.

Title：Theoretical design, patterns comparison and optimal structure verification methods of aircraft integrated composite thin-walled stiffened structure

Abstract：Thin-walled stiffened structure is a typical lightweight high-strength structure with high load-carrying efficiency widely used in aircraft structures, and is the most common basic configuration in various types of aircraft in the aviation field. The optimal design and accurate evaluation of the load-carrying capacity of such structures is a research work with important scientific significance and engineering value. In recent years, the integrated processing technology has been widely applied and promoted in the field of composite structure preparation, which brings new problems to the evaluation of mechanical properties of thin-walled stiffened structures. In this report, the integrally formed stiffened panel is taken as a typical structural composite component, and its buckling and post-buckling design theory, test technology, numerical simulation technology and rapid prediction method of mechanical properties used in the stagesinitial design, patterns comparison and optimal structure verification are systematically introduced, and the key mechanical problems and technologies are summarized.

Prof.Zhikun Zheng,Sun Yat-Sen University

郑治坤教授，中山大学

Biography：Zhikun Zheng received his Ph.D. in July 2008 in analytical chemistry from the Chinese Academy of Sciences, and moved to Germany in September 2008 to join Armin Gölzhäuser’s group as a postdoc at the department of physics, Bielefeld University. In October 2010, Zheng joined A. Dieter Schlüter’s group of polymer chemistry at the Department of Materials at ETH Zürich where he was promoted to senior scientist in November 2013. From November 2014, he worked as a group leader with Xinliang Feng at TU Dresden. His term there ended after he accepted a full professorship at Sun Yat-Sen University in Guangzhou, China, in Feb. 2017. His interests include crystalline organic polymers and optical encryptionmaterials.

Title：Macroscopic Two-Dimensional Polymers: Synthesis and Structure Control 

Abstract：At present, one of the key challenges faced by the scientific community is to go beyond graphene, a prototypical two-dimensional polymer (2DP, a laterally infinite, one atom- or monomer-unit thin, free-standing network with long-range order along two orthogonal directions), to synthesize its analogues with structural control at the atomic- or molecular- level under mild conditions. Here we present the rational synthesis of monolayer and multilayer 2DPs at an air-water interface. Such 2DPs are highly crystalline with controlled aggregate structure and microstructure and tunable single-crystal domain size in the range of tens of nanometers to several micrometers. They have a tunable thickness ranges from 0.7 nm to around 1μm and a lateral size up to 4-inch wafer, and can be freely suspended over 40 μm × 40 μm sized holes. They are rigid and flexible, and can be conformed and bonded robustly to nearly any surface, facilitating their integration with target supports or into devices for the extraction of properties. On the basis of the elucidation of their molecular structures, near atomic structures, grain boundaries and edge structures, some preliminary structure-property relationships of the 2DPs were obtained.

Prof. Wei Yang, ChongQing University

杨为教授，重庆大学

Biography：He is a professor and doctoral supervisor in the College of Mechanical and Vehicle Engineering of Chongqing University. He is one of the "Double Innovation" talents in Jiangsu Province, a research mainstay of the "Changjiang Scholar and Innovation Team Development Program" of the Ministry of Education and the National Defense Science and Technology Innovation Team. He is an expert in the National Science and Technology Progress Award and the Science Progress Award of the Ministry of Education. He has long been engaged in the research of high performance manufacturing technology and major equipment, new energy vehicles and intelligent robots. He is responsible for or has conducted more than 50 scientific research projects entrusted by national, provincial and ministerial levels and enterprises. He has received one first-class award, three second-class awards and four third-class awards at provincial and ministerial level. He has published more than 100 papers in Mechanical Systems and Signal Processing, Proc. IMechE, Part K，Journal of Vibroengineering， IEEE TRANSACTIONS ON MAGNETIGS，etc in important academic journals and international conferences. He has nearly 30 EI/SCI citing  article,and has been granted more than 20 invention patents and software copyrights.

Title：Study on Vibration Reduction Performance of Gear Pairs Made of High Strength Fe-Mn Damping Alloy

Abstract：Based on the characteristics that the damping alloy can convert mechanical energy into heat energy and dissipate it in materials and environment, high-strength Fe-Mn damping alloys were used to replace common gear materials to absorb vibration-generated energy from the vibration source. A high-strength Fe-Mn damping alloy was developed. Taking two kinds of new damping alloy materials and common materials as the research object, the constitutive model of Fe-Mn damping alloy material was established, the temporal increment step form of a three-dimensional constitutive model was deduced, and a user-defined material (UMAT) sub-program of damping alloy constitutive model were developed by FORTRAN language. Based on the three-dimensional contact nonlinear finite element model of the gear shaft-bearing box, the transient dynamic analysis was conducted by using the non-explicit algorithm to obtain the responses of vibration acceleration on the gear reducer box, which can verify the correctness of the proposed constitutive model. The vibration experiments of gear reducer made of the above-mentioned materials were carried out under different working conditions. Vibration reduction of the developed high-strength Fe-Mn damping alloy can be certificated by comparing the vibration acceleration response and the measuring point temperature of the gear reducer house prepared by different alloys.