Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › Why does mass matrix only have values in the x-direction? › Reply To: Why does mass matrix only have values in the x-direction?

May 6, 2024 at 6:24 am
dhjang4522
Subscriber

Hi Dave,

I used code that i found on interent and the same matrix is generated without using it. There are reaction Forces in all directions. I think I might have misunderstood initially; it seems that mass exists not only in the X-direction but also specifically at each degree of freedom. So, should I understand it as when a force is applied in a certain direction, acceleration is produced only in that direction, with the formula Fx1 = M1xA1x + M2xA2x + M2x*A3x  and Fy1 = M1yA1y + M2yA2y + M2y*A3y ...?