# Vibration Analysis

1. Feb 26, 2009

### ricky_fusion

1. The problem statement, all variables and given/known data
Known :
- Material : Tungsten
- Property : G7 - Drill, you can see the picture in here :
http://www.accuromm.com/drills.html" [Broken]
- Other information you can find here :
1. http://www.efunda.com/materials/com...m?MatlPhase=Solid&MatlProp=Acoustic#Acoustic"
2. http://www.efunda.com/materials/com...atlPhase=Solid&MatlProp=Mechanical#Mechanical
3. http://en.wikipedia.org/wiki/Tungsten" [Broken]

For information : I am newbie about dynamic analysis and before this, I am analysis about static only. Can anyone help me solve this problem?? I am appreciated your helpfull and Iam so sorry to makes you busy.If anyone can tell me about the step by step, it's okay to me.
The question are :
1. I want to looking for Vibration and critical point
2. do you know where I can find Structural Damping Coefficient for Tungsten??
3. How to created fungtion of Power Spectral Density
4. How to created fungtion of Frequency Responce

2. Relevant equations
http://en.wikipedia.org/wiki/Vibration" [Broken]

3. The attempt at a solution
I have been try this steps, but I am confucing about the next steps.
1. For Yield Stress =550 MPa, Ultimate Strength = 550-620 MPa (as known in wikipedia)
2. Allowable/Permissible Stress= 0.4 (Yield Stress) = 220 MPa
3. Safety Factor = (ultimate Stress)/(Allowable Stress) = 3

Last edited by a moderator: May 4, 2017