ATI's Vibration & Noise Control course —New Insights and Developments

This course is intended for engineers and scientists concerned with the vibration reduction and quieting of vehicles, devices, and equipment. The course will provide guidance relevant to design, problem solving, and development of improvements. It will emphasize understanding of the relevant phenomena and concepts in order to enable the participants to address a wide range of practical problems insightfully. The instructors will draw on their extensive experience to illustrate the subject matter with examples related to the participant’s specific areas of interest. Although the course will begin with a review and will include some demonstrations, participants ideally should have some prior acquaintance with vibration or noise fields. Each participant will receive a complete set of course notes and the text Noise and Vibration Control Engineering, a $210 value. View course sampler

What you will learn:

• How to attack vibration and noise problems
• What means are available for vibration and noise control
• How to make vibration isolation, damping, and absorbers work
• How noise generated and radiated, and how it can be reduced

Course Outline:

1. Review of Vibration Fundamentals from a Practical Perspective. The roles of energy and force balances. When to add mass, stiffeners, and damping. General strategy for attacking practical problems. Comprehensive checklist of vibration control means.

    

2. Structural Damping Demystified. Where damping can and cannot help. How damping is measured. Overview of important damping mechanisms. Application principles. Dynamic behavior of plastic and elastomeric materials. Design of treatments employing viscoelastic materials.

    

3. Expanded Understanding of Vibration Isolation. Where transmissibility is and is not useful. Some common misconceptions regarding inertia bases, damping, and machine speed. Accounting for support and machine frame flexibility, isolator mass and wave effects, source reaction. Benefits and pitfalls of two-stage isolation. The role of active isolation systems.

    

4. The Power of Vibration Absorbers. How tuned dampers work. Effects of tuning, mass, damping. Optimization. How waveguide energy absorbers work.

    

5. Structure-borne Sound and High Frequency Vibration. Where modal and finite-element analyses cannot work. Simple response estimation. What is Statistical Energy Analysis and how does it work? How waves propagate along structures and radiate sound.

    

6. No-Nonsense Basics of Noise and its Control. Review of levels, decibels, sound pressure, power, intensity, directivity. Frequency bands, filters, and measures of noisiness. Radiation efficiency. Overview of common noise sources. Noise control strategies and means.

    

7. Intelligent Measurement and Analysis. Diagnostic strategy. Selecting the right transducers; how and where to place them. The power of spectrum analyzers. Identifying and characterizing sources and paths.

    

8. Coping with Noise in Rooms. Where sound absorption can and cannot help. Practical sound absorbers and absorptive materials. Effects of full and partial enclosures. Sound transmission to adjacent areas. Designing enclosures, wrappings, and barriers.

    

9. Ducts and Mufflers. Sound propagation in ducts. Duct linings. Reactive mufflers and side-branch resonators. Introduction to current developments in active attenuation.