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by: Jonah Leary

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# Week 6 Notes ME 3120 - 01

Jonah Leary
WSU
GPA 3.284

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Some of the things we talked about last week in class.
COURSE
System Dynamics
PROF.
Ahsan Mian
TYPE
Class Notes
PAGES
2
WORDS
KARMA
Free

## Popular in Mechanical and Materials Engineering

This 2 page Class Notes was uploaded by Jonah Leary on Saturday October 8, 2016. The Class Notes belongs to ME 3120 - 01 at Wright State University taught by Ahsan Mian in Fall 2016. Since its upload, it has received 11 views. For similar materials see System Dynamics in Mechanical and Materials Engineering at Wright State University.

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Date Created: 10/08/16
ME 3210 Notes – Week 6 Chapter 4: Spring/Mass/Dashpot F FL F AE σ A FL F=kx δ= AE k= =δ L E= =ϵ δ = Aδ L 1 1 TL 32TL PE= Fx= k x 2 T=K θθ τ = TR θ= = 2 2 max J GJ Gπd 4 4 K = πd G θ 32L F =b ´( −´x ) Viscous Dissipation or Friction Elements: a 2 1 b= coefficient of viscous dissipation T dc (d −2 )´1 Rate of energy dissipation: 2 Ed=−bx T1 r1 ω 2 Gears: r=# of teeth T1ω 1T ω2 2 T1=F rc 1 = = T 2 r2 ω 1 Prob. 4.22: ϕ>θT=kθ T 1T =2 α s0sT =T 1 2 M =T −T =Iθ→K ϕ−θ −K(θ=Iθ ) ´ 0 1 2 1 2 I θ+ K 1K 2θ=ϕ→I s θ s + K +K θ s =K 1ϕ s K K ( ) ( 1 2) ( ) ( ) 1 1 T( )= θ( )= K 1 ϕ s) I + K +K s ( 1 2) y=2x PE= k x 2 Prob. 4.31: 2 KE= m ´ x + 1m ´y2 2 1 2 2 d 1 2 1 2 KE+PE=constant ( k x + (m1+4m ´2x )0 dt 2 2 kx+(m1+4m ´2)x=0 If f ≠ 0 , cannot use energy method, draw FBD ∑ F :2T−kx−μN=m ´ x ∑ F :N=m g x 1 y 1 T−m g2−m 2x 2 ´ →T=m (2−2x ´) 2m g−kx−μm g= m +4m ´ x 2 1 ( 1 2

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