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2020 | Book

Introduction to Structural Vibration Control Technology Read chapter Read first chapter

Particle Damping Technology Based Structural Control

Authors: Prof. Zheng Lu, Prof. Sami F. Masri, Prof. Xilin Lu

Publisher: Springer Singapore

Book Series : Springer Tracts in Civil Engineering

Part of: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik" , Springer Professional "Wirtschaft"

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About this book

This book presents a systematic introduction to particle damping technologies, which can be used to effectively mitigate seismic-induced and wind-induced vibration in various structures. Further, it offers comprehensive information on the latest research advances, e.g. a refined simulation model based on the discrete element method and a simplified simulation model based on equivalent principles. It then intensively studies the vibration attenuation effects of particle dampers subjected to different dynamic loads; in this context, the book proposes a new damping mechanism and “global’’ measures that can be used to evaluate damping performance.

Moreover, the book uses the shaking table test and wind tunnel test to verify the proposed simulation methods, and their satisfactory damping performance is confirmed. To facilitate the practical engineering application of this technology, optimization design guidelines for particle impact dampers are also provided. In closing, the book offers a preliminary exploration of semi-active particle damping technology, which holds great potential for extension to other applications in which the primary system is subjected to non-stationary excitations.

Table of Contents

Frontmatter
Chapter 1. Introduction to Structural Vibration Control Technology
Abstract
Structural vibration control is to control the vibration of the structure under earthquake and wind by changing the stiffness, mass, damping and shape of the structure and providing a certain amount of passive or active reaction forces.
Zheng Lu, Sami F. Masri, Xilin Lu
Chapter 2. Origination, Development and Applications of Particle Damping Technology
Abstract
The concept of particle damping could be traced back to 1937, when Paget [1] was studying the vibration attenuation problem of the turbine blades, during which he invented the impact damper.
Zheng Lu, Sami F. Masri, Xilin Lu
Chapter 3. Theoretical Analysis and Numerical Simulation of Particle Impact Dampers
Abstract
The numerical simulation of the behaviors of particles, which are placed in particle dampers under wind loads and seismic loads, has still not been well developed. Due to the sudden change of momentum caused by collisions of particles, the performance of particle dampers is highly nonlinear, and therefore, it is hard to obtain the analytical solution of the system.
Zheng Lu, Sami F. Masri, Xilin Lu
Chapter 4. Performance Analysis of Particle Dampers Attached to Single-Degree-of-Freedom (SDOF) Structures
Abstract
Based on the numerical model of the particle damper established in the previous chapter, starting from this chapter, the performance of different structures with additional particle dampers (including their variants) under different excitations will be discussed according to the order from shallow to deep, from simple to complex, and from single-degree of freedom to multi-degree of freedom. This chapter first derives the analytical solution of the single-degree-of-freedom system with a single particle impact damper under simple excitation, then introduces the vertical dynamic characteristics of the particle damper, and finally systematically investigates the influence of the parameters of the particle damper under horizontal harmonic excitation.
Zheng Lu, Sami F. Masri, Xilin Lu
Chapter 5. Performance Analysis of Particle Dampers Attached to Multi-degree-of-Freedom (MDOF) Structures
Abstract
The previous chapter carries out the performance analysis of particle dampers attached to single-degree-of-freedom (SDOF) structures, with an emphasis on the structural dynamic characteristics under correlated stationary random excitations in the x and y directions. Based on such investigation, in this chapter, the main structures are generalized to multi-degree-of-freedom (MDOF) ones, and the damping performance of particle dampers attached to MDOF structures is systematically analyzed. Especially, the external excitations have been expanded from stationary random excitations to nonstationary random excitations, which are more consistent with the actual situation (Lu et al in J Vib Control 17(10):1454–1471, 2011, [1], Lu et al in Sturct Control Health Monit 18(1):79–98, 2011, [2] and Lu et al in J Sound Vib 329(26):5415–5433, 2010, [3]).
Zheng Lu, Sami F. Masri, Xilin Lu
Chapter 6. Shaking Table Test Study on Particle Damping Technology
Abstract
In the former five chapters, from shallow to deep, from simple to complex, the performances of single-degree-of-freedom system, double-degree-of-freedom system and multi-degree-of-freedom system with additional particle dampers were analyzed in detail.
Zheng Lu, Sami F. Masri, Xilin Lu
Chapter 7. Wind Tunnel Test Study on Particle Damping Technology
Abstract
In the previous chapter, the shaking table test of particle damping technology was systematically studied. This chapter will carry out a deeper analysis of its damping effect under wind excitations. Earthquake and wind are the dynamic excitations that must be considered in the design of civil engineering structures. The excitation properties of them are different. Earthquakes tend to be short-duration with multiple frequencies, and wind excitations are more similar to white noise and last longer. Therefore, it is more challenging to use the same structural vibration control method to have better damping effect on the two kinds of different excitations. Common linear dampers, such as tuned mass dampers, tend to have better control effects on wind excitations and poor damping effects on earthquakes. Particle damping technology can broaden the damping band of the damper by the nonlinear action of particle collision. Its damping characteristics under earthquake action have been verified. This section will continue to explore its damping characteristics under wind excitations, especially the influence of different design parameters, and finally introduces the simplified design method and its realization way for engineering application.
Zheng Lu, Sami F. Masri, Xilin Lu
Chapter 8. Optimization Design of Impact Dampers and Particle Dampers
Abstract
Regarding the design of particle impact dampers, there are many design parameters affecting their damping performance, such as the mass ratio of the PID to the primary structure, number, size, and material of the particles, restitution and friction coefficients of the particles, gap clearance, and filling ratio (volume fraction). Therefore, the solution of applying PIDs to dissipate vibration provides more possibilities for engineers, as there are plenty of design parameters available for a possible implementation. In this chapter, some innovative and effective simulation approaches have been carried out to determine the optimal parameters of impact dampers and particle dampers by which the maximum damping effectiveness can be acquired.
Zheng Lu, Sami F. Masri, Xilin Lu
Chapter 9. Semi-active Control Particle Damping Technology
Abstract
Since semi-active control can provide adaptability comparable to active control without installing large energy sources, semi-active control devices have attracted considerable attention in recent years. In fact, many devices can operate on battery power, which is important in extreme situations such as typhoons, tornadoes, earthquakes, where structural main power supply failures occur. According to the currently accepted definition, the semi-active control device does not increase the mechanical energy (including structure and device) of the control system, but has the property of being dynamically changeable to minimize the response of the structural system. Therefore, semi-active control systems do not have the potential to reduce the stability of structural systems (in limited input/limited output frames) compared to active control systems.
Zheng Lu, Sami F. Masri, Xilin Lu
Metadata
Title
Particle Damping Technology Based Structural Control
Authors
Prof. Zheng Lu
Prof. Sami F. Masri
Prof. Xilin Lu
Copyright Year
2020
Publisher
Springer Singapore
Electronic ISBN
978-981-15-3499-7
Print ISBN
978-981-15-3498-0
DOI
https://doi.org/10.1007/978-981-15-3499-7