Dr. Raj is a very knowledgeable instructor. He kept the course interesting and enjoyable.  Craig Marifke, Harwood Engineering Consultants, Milwaukee, WI

I did not know how much I didn't know until taking this seminar. The problems encountered, and solutions that were discussed, provided invaluable knowledge no one would ever find in a text.  Justin Quillen, Structural Engineer, Jacobs, Orlando, FL

Purpose and Background

The course may be divided into 6 parts:

1. Structural vibration fundamentals
2. Analysis techniques
3. Synthesis of analysis and test results
4. Designing for dynamic forces
5. Applications in residential and commercial buildings and industrial facilities
6. Example case histories

Emphasis of the course is not on derivation of equations but on assumptions and limitations of various analysis technique, and guidelines on when to use which method. Twenty worked out numerical examples and five case studies are presented as necessary. The detailed step-by-step analysis/design example problems will serve as a useful guide for your projects. Participants will receive a comprehensive set of notes and a textbook as reference materials. Participants will have ample opportunity to interact with the instructor and discuss their questions.
 
Seminar Benefits

This is an intermediate level course. Learn how to compute the natural frequencies, mode shapes and forced-vibration response of structures and structural components. Benchmarking analytical results with test results or field data is also taught. A variety of methods for reducing excessive vibrations in new as well as existing structures are discussed (frequency separation techniques, variety of dampers, vibration absorbers (tuned-mass dampers), vibration isolators). Rotating equipment and foundations, floor vibrations, earthquake analysis, blast loads, vibration isolation, structure-fluid systems and flow-induced vibrations are also discussed.

Learning Outcomes

• Compute natural frequencies of simple and complex structures
• Compute structural response to dynamic loads
• Compute structural response to base excitations (for example earthquakes)
• Design vibration absorbers (tuned-mass dampers)
• Design vibration isolators
• Design rotating equipment and foundations for rotating equipment
• Prevent flow-induced vibrations
• Troubleshoot and modify existing structures to reduce unacceptable levels of vibration

The course includes twenty detailed step-by-step analysis/design example problems and five actual case studies. The worked out examples will serve as a useful guide for your projects. The five case histories demonstrate how the various concepts and methods presented in the course are applied in complex vibration projects.

Assessment of Learning Outcomes

Achievement of the learning outcomes will be assessed through problem-solving sessions and testing.

Special Features

All participants will receive the book Structural Dynamics: Theory and Applications, and supplementary notes prepared by the instructor.

Who Should Attend?

Engineers and engineering supervisors who are responsible for designing or qualifying structures and structural components subjected to dynamic forces and those responsible for auditing, reviewing, or approving vibration analysis tasks will benefit from the course. Those with very little experience in vibration analysis, as well as those with some years of experience, will find the course useful.

Seminar Outline

TIME:  8:30 a.m. - 4:30 p.m.

DAY 1

Structural Vibration Fundamentals

• Free vibration and forced vibration
• Analysis models for structural dynamic systems
• Types of dynamic forces
• Representation of dynamic forces in the time and frequency domains

Analysis Techniques

• One-degree-of-freedom systems
• Natural frequency and critical damping
• Harmonic forces and the concept of resonance
• Transient forces
• Dynamic amplification factor
• Forces transmitted to foundations
• Base excitation
• Response spectra
• Multiple-degrees-of-freedom systems
• Natural frequencies and mode shapes
• Direct time-history analysis
• Modal time-history analysis
• Response spectrum analysis

DAY 2

• Practical aspects of finite element modeling and analysis of vibration problems
  This is not a course on finite element analysis. Course concentrates on the special aspects of modeling and analyzing complex structures for vibration analysis. Guidelines for mesh size, cut-off frequency and time-steps are also presented.
• Modal Testing
• Test procedure
• Interpretation of test data
• Determination of natural frequencies, mode shapes and damping
• Synthesis of Analysis and Test Results
• Test-analysis correlation
• Fine-tuning finite element models using test data
• Structural response to earthquake
• Representation of base excitation
• Time-history analysis
• Response spectrum analysis
• Structural response to blast loads
• Blast load computation
• Dynamic response analysis
• Floor vibration due to machinery and human activities
• Rotating machinery vibrations
• Soil stiffness, soil damping and foundation design for rotating machines

DAY 3

• Vibration Absorbers (tuned-mass dampers)
• Basic concepts, types of absorbers and design procedure
• Vibration Isolators
• Basic concepts, types of isolators and design procedure
• Designing for Dynamic Forces
• Design aspects are discussed throughout the course. Here the different strategies of reducing vibration are summarized and relative merits discussed with practical examples
• Special Topics
• Basic concepts and overview of the following special topics are presented:
• Fluid-structure systems
• Flow-induced vibrations 
• Numerical Examples: Twenty detailed, step-by-step worked out examples of analysis and design are presented at appropriate places throughout the course
• Case Studies: Five case histories are presented to demonstrate how the various concepts and methods presented in the course are applied in complex vibration projects. These projects are solved as group exercise to get participants working on complex projects with guidance from instructor

Discounted hotel rooms are available on a first-come, first-served basis. See discount deadline and rates for each hotel below.