Energy is not pumped into the system Locock. The amplitude does not grow it stays constant.
My c coefficient is positive (.5*Cd*Area*density), but so is the c when you assume a linear relationship between damping and velocity. They both should have the same effect I would think. When I take...
I am trying to model a simple dampened spring system with a mass under its own weight except I want the damping to be drag, thus proportional to velocity squared.
m y"(t) + c y'(t)^2 + k y(t) = W
When I graph the solution on MathCAD, it never decays, it is an endless oscillation. Any ideas?
W7 and Z3 are the respective row and column labels for the new array that you fill in such as
Z3-> 1 2
W7-> 1 5 6
2 7 8
You leave the dollar sign off the 7 and off the Z so you can fill the formula up and down or left and right
When checking the combined inplane stresses with lateral load(3.6), there are the four conditions (tension-tension, tension-compression,etc.) and then it says a Von Mises check also applies, Equation 3.6-5. However, the denominators in the unity equation are fcr, not Fy. What does buckling...
I want to change data from this
Row Column Value
1 1 5
1 2 6
2 1 7
2 2 8
to this:
Row Column
1 2
--- ------
1 5 6
2 7 8
I cant seem to figure it out...
I am trying to do buckling strength analysis of an unstiffened plate with lateral pressure and inplane stress. DNV RP-201 looks to be appropriate but I am concerned it only applies to plate supported at all 4 edges.
Anything I am missing, or a correction factor?
I was thinking of maybe...
I am trying to draw a set of curves for a two parameter system.
x:=1,2..3
y:=1,2..10
f(x,y):=x*y^2
I want lines for x=1,2,3. My mathcad guide says you can get rid of the "flyback" to zero using the draw option in the plot menu but I cannot find it anywhere.
Anyone know some good tips for...
If I have
x:=1,2..4
y:=x+1
x=1,2,3,4
y=2,3,4,5
I can do max(y), but how do I get it to return what x causes the max?
I cannot do differentiation because I have a more complex equation with absolute value and thus is discontinuous.
Thanks
Is there any way to tell Mathcad that you want to treat an expression as a variable only? For instance I want to define KL/r as a variable, and it keeps thinking I trying to write a formula KL divided by r.
