Mechanical Engineering and Industrial Engineering: Applied Research on Vibration Control Principles and Seismic Technology of Engineering

Course 2: Mechanical Engineering and Industrial Engineering: Applied Research on Vibration Control Principles and Seismic Technology of Engineering

I. Course Description

Structural dynamics is the response and behavior of objects under external forces, as well as during vibration and deformation. The research goal is to understand the force and deformation of the structures under different working conditions, in order to evaluate their stability, safety, and performance under different environmental conditions. With the development of modern engineering technology, structural dynamics has become more important. For example, the design and analysis of complex engineering structures such as large cross-sea Bridges, high-rise buildings, aircraft and automobiles all need to consider the response of the structures during operation and vibration.

This course aims to introduce students to the basic concepts of mechanical vibration and the structural dynamics analysis of the SDOF equations of motion as the first course of the 21st century. We will explore the free vibration analysis of the SDOF equations of motion, covering the components of the basic SDOF kinetic system, equations of motion, undamped free vibration and damped free vibration. Then, we will explain the mechanical dynamic response of the harmonic load, covering undamped and damped systems, steady-state vibration response, and resonant response. Furthermore, we will study the structural dynamics response affected by periodic loading and pulse loading, using the Fourier series expression of the load function. In the 21st century engineering and technology, it can be applied to mechanical engineering, aerospace engineering, civil and construction engineering, naval construction, electrical engineering, chemical engineering, bioengineering, nanotechnology, and nanoelectronics.

II. Professor Introduction

Jiann-Wen Woody Ju –Tenured professor at UCLA

Professor Jiann-Wen Woody JU received his MA and PhD from the University of California, Berkeley, is currently a Senior Tenured Professor at the University of California, Los Angeles, and has served as chair of the Department of Civil and Environmental Engineering. Professor JU also teaches at Tongji University and Paris VI. In 2024, Professor JU was elected as a Fellow of the European Academy of Science and Arts. By 2020, the Academy has more than 2,000 academicians, of which 33 of them are Nobel Prize winners, making one of the highest proportion of academicians in the world.

In addition, Professor JU has worked in a number of internationally renowned academic journals, including editor of International Journal of Injury Mechanics, deputy editor of ASCE Journal of Nanomechanics and Micro Mechanics, and editorial member of Journal of Mechanics. Professor JU has published several papers in top academic journals, and in Google Academic 2024, professor JU made 12,318 references.

III. Syllabus

1. Introduction to Dynamics and wide engineering applications
2. Free vibration, and damping
3. Underdamping system, vibration control
4. Dynamic response of the harmonic load
5. Steady-state vibration response
6. Earthquake isolation technology and vibration control
7. Dynamic response to periodic loads
8. Response to the impulse load (impact, collision, explosion)
9. Dynamic response of general (arbitrary) loads
10. Response of the damping system under any mechanical load