What you'll learn
Find the stiffness and critical damping of the system.
Calculate the damping coefficient, logarithmic decrement, damping ratio, damping frequency, and natural frequency of the system.
Learn the effect of damping in forced vibration of a single degree of freedom due to forces.
Understand the application of force excitation on two degrees of freedom spring-mass system.
Find how to set secondary mass parameters in order to absorb primary mass vibration.
Requirements
Basic Mathematics
Machine Dynamics
Mechanical Vibrations
Free Vibration
Forced Vibration
Description
This course explains the use of Virtual Labs for Machine Dynamics and Mechanical Vibrations lab. It takes you through various simulation experiments of free and forced vibrations. In case of absence of a working Mechanical Vibrations laboratory, this type of simulation analysis helps in understanding how to study the experiments. All the experiments of this lab has been explained in detail so as to gain the understanding of various concepts and features of the virtual lab and for practice so that expertise can be gained in handling the online simulation lab. We start with Introduction to Virtual Labs and Introduction to Machine Dynamics and Mechanical Vibrations(MDMV) Lab. We discuss the scope of Virtual Labs and what are the contents of the MDMV lab. Second section deals with Free Vibration Experiments. Here the procedure for three experiments have been explained namely, Free Vibration of- Cantilever beam, Simply Supported beam and Fixed beam. The purpose of these experiment are to determine the logarithmic decrement, damping ratio, damping frequency and natural frequency of a cantilever beam under free vibration.Third section is all about the Forced Vibration Experiments. Here the procedure for five experiments have been explained namely, Forced vibration of SDOF system, Base Excitation, Rotating Unbalance, 2DOF Forced vibration and Dynamic Vibration Absorber. Simulation and analysis of single degree of freedom system and two degree of freedom system has been explained. Also graph plotting of dynamic amplitude versus frequency ratio has been done.
Overview
Section 1: INTRODUCTION
Lecture 1 Introduction to Virtual Labs
Lecture 2 Machine Dynamics & Mechanical VLAB
Section 2: Free Vibration Experiments
Lecture 3 Free Vibration of Cantilever Beam
Lecture 4 Free Vibration of Simply Supported Beam
Lecture 5 Free Vibration of Fixed Beam
Section 3: Forced Vibration Experiments
Lecture 6 Forced vibration of SDOF system
Lecture 7 Base Excitation
Lecture 8 Rotating Unbalance
Lecture 9 2DOF Forced vibration
Lecture 10 Dynamic Vibration Absorber
U.G. B.E/BTech Mechanical Engineering Students,P.G. MTech/MS Mechanical Engineering students,Students from Field of Acoustics



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