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Home / Questions / Repeat Exercise 84 with an impulse f1 F1δt imposed on mass m1 instead of mass m2 EXAMPLE ...

Repeat Exercise 84 with an impulse f1 F1δt imposed on mass m1 instead of mass m2 EXAMPLE 84 Absorber for a diesel engine2 An engine of mass 300 kg is found to experience undesirable vibration

Repeat Exercise 8.4 with an impulse f1 = F1δ(t) imposed on mass m1 instead of mass m2.

 

EXAMPLE 8.4

Absorber for a diesel engine2

An engine of mass 300 kg is found to experience undesirable vibrations at an operating speed of 6000 rpm. If the magnitude of the excitation force is 240 N, design a vibration absorber for this system so that the maximum amplitude of the absorber mass does not exceed 3 mm. To design the vibration absorber for this system, we make use of the analysis of Example 8.3 and the parameters given above to determine the absorber stiffness k2 and the absorber mass m2. From the information provided, the excitation frequency is given by

and the excitation amplitude is

The amplitude X2 of the absorber mass has to be such that

 

 

 

Jun 25 2020 View more View Less

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