Active and Passive Vibration Control of Structures by Peter Hagedorn, Gottfried Spelsberg-Korspeter

, , Comments Off on Active and Passive Vibration Control of Structures by Peter Hagedorn, Gottfried Spelsberg-Korspeter

By Peter Hagedorn, Gottfried Spelsberg-Korspeter

Active and Passive Vibration keep watch over of buildings shape a subject of very real curiosity in lots of various fields of engineering, for instance within the automobile and aerospace undefined, in precision engineering (e.g. in huge telescopes), and in addition in civil engineering. The papers during this quantity assemble engineers of alternative heritage, and it fill gaps among structural mechanics, vibrations and glossy keep an eye on conception. additionally hyperlinks among the various functions in structural regulate are shown.

Show description

Read Online or Download Active and Passive Vibration Control of Structures PDF

Best robotics & automation books

Hard Disk Drive: Mechatronics and Control (Automation and Control Engineering)

I purchased this ebook to higher comprehend the basics of the hard disk itself and never software program and working platforms. i discovered this ebook to have a logical subject development and a sweeping overview of harddisk basics. It brought what i wanted in a good demeanour with lots of tables and diagrams to assist realizing.

FIRST Robots: Aim High: Behind the Design

Own robots are approximately as complex this day as own desktops have been at the eve of the 1st IBM laptop within the early Nineteen Eighties. they're nonetheless the area of hobbyists who cobble them jointly from scratch or from kits, subscribe to neighborhood golf equipment to change code and level contests, and whose exertions of affection is atmosphere the level for a technological revolution.

Modal Interval Analysis: New Tools for Numerical Information

This publication offers an leading edge new method of period research. Modal period research (MIA) is an try and transcend the constraints of vintage durations by way of their structural, algebraic and logical gains. the place to begin of MIA is sort of uncomplicated: It is composed in defining a modal period that attaches a quantifier to a classical period and in introducing the elemental relation of inclusion among modal periods throughout the inclusion of the units of predicates they settle for.

Extra resources for Active and Passive Vibration Control of Structures

Example text

5 5 r (126) For Ω 2 > g/3r all eigenvalues have vanishing real parts. The penny no longer tips over, but performs oscillations about the rolling motion. A typical example is the coin rolling on a table. Due to dissipative effects in the contact between coin and table, omega decreases, and finally the coin ends up tipping over. But also with constant rotational speed, dissipative effects may destroy the gyroscopic stabilization, as we shall see in the next paragraph. Gyroscopic Systems with Damping In the previous paragraph we mentioned that a system with an indefinite stiffness matrix may be stabilized by gyroscopic forces, and we noted that damping may hinder such a stabilization.

N. (120) Mechanical Systems: Equations of Motion and Stability 27 With the argument ik (121) = arg rik = arg(aik + jbik ) of the k-th component of the i-th eigenvector ri , the i-th eigensolution can also be written as ⎡ i1 ) |rin | cos(ωi t + γi − in ) ⎤ |ri1 | cos(ωi t + γi − ⎢ |ri2 | cos(ωi t + γi − ⎢ qi (t) = Ki ⎢ .. ⎣ . ⎥ ⎥. ⎦ i2 ) ⎥ (122) Therefore, each component of this eigensolution is a harmonic oscillation with circular eigenfrequency ωi . However, exactly as in the M -D-K-systems, each component in general has a different phase angle ik .

From elementary theory of elasticity (see, for example, Timoshenko and Goodier (1970)), it is known that when the beam is deflected, certain hypothetical longitudinal lines or fibers are elongated, while others are compressed. There, however, exist fibers which are neither elongated nor compressed, but are merely deflected. Such a fiber is called the neutral fiber, and is shown in Fig. 5. It Mechanical Systems: Equations of Motion and Stability 39 is assumed that cross-sections orthogonal to the neutral fiber before deformation are are also orthogonal to the neutral fiber in the deformed beam.

Download PDF sample

Rated 4.50 of 5 – based on 26 votes