# A piece of machinery weighing 4,800 lb (2.1352 x 10^4 N) is observed to deflect 1.2 in (0.0305...

## Question:

A piece of machinery weighing 4,800 lb (2.1352 {eq}\times{/eq} 10{eq}^4{/eq} N) is observed to deflect 1.2 in (0.0305 m) when at rest. A harmonic excitation of 100 lb (444.8 N) amplitude induces resonance.

Design a vibration absorber undergoing a maximum deflection of 0.1 in (0.00254 m). What is the value of the mass ratio?

## Vibration Absorber

The mechanical device which absorbs shocks and vibrations is called the Vibration absorber. Spring, rubber and damper etc are the best examples of the vibration absorber.

## Answer and Explanation: 1

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Given Data

• The weight of the machinery is: {eq}{W_m} = 4800\;{\rm{lb}} = 2.1352 \times {10^4}\;{\rm{N}} {/eq}.
• The harmonic excitation of the...

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#### Learn more about this topic: Practice Applying Spring Constant Formulas

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Chapter 17 / Lesson 11
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In this lesson, you'll have the chance to practice using the spring constant formula. The lesson includes four problems of medium difficulty involving a variety of real-life applications.