Help with text book (vibration)

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SUMMARY

The discussion focuses on the substitution of equation 3.5 into equation 3.3 in the context of vibration analysis. The user is specifically confused about the handling of the second derivative of cosine, represented as ##cos^{\prime\prime}(y)=-\cos(y)##, and the absence of the s^2 term in the equations. The key takeaway is the importance of understanding the relationship between derivatives and their corresponding equations in vibration theory.

PREREQUISITES
  • Understanding of differential equations in vibration analysis
  • Familiarity with trigonometric functions and their derivatives
  • Knowledge of the mathematical representation of vibrations
  • Basic concepts of linear systems and oscillatory motion
NEXT STEPS
  • Study the derivation of differential equations in vibration theory
  • Learn about the properties of trigonometric derivatives in oscillatory systems
  • Explore the application of Laplace transforms in solving vibration problems
  • Investigate the role of boundary conditions in vibration analysis
USEFUL FOR

Students and professionals in mechanical engineering, particularly those specializing in vibration analysis and dynamics, will benefit from this discussion.

MMCS
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HI,

I am studying vibration, came across this in a textbook and can't see the steps taken to substitute e.q 3.5 into 3.3. There is a second derivative x so where does this go, as there is no s^2 either and I can't see how cos was eliminated

Cheers
 

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##cos^{\prime\prime} (y)=- \cos(y)##
 

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