Hi everyone,
I am doing a thermalmechanical analysis by ANSYS 7.0 for a package with temperature decreased from 260C to room temperature. But I do not know clearly how to define the material properties of epoxy, including elastic modulus and coefficient of thermal expansion (CTE). Because...
Dear all,
I want to obtain the modal mass and modal stiffness, effective mass and effective stiffness for some modes from my modal analysis in ANSYS.
By default, the modal mass is normallized in ANSYS, then the modal stiffness is equal to the square of natural frequency for a mode. Right...
Hello,
I know that the natural frequency of a structure is the square root of the ratio of equivalent stiffness (in the form of elastic modulus) to equivalent mass (in the form of density).
I have two questions about this equation.
In my model, an epoxy block was sandwiched by two Kovar...
Hello,
I know that the natural frequency of a structure is the square root of the ratio of equivalent stiffness (in the form of elastic modulus) and equivalent mass (in the form of density).
I have two questions about this equation.
In my model, an epoxy block was sandwiched by two Kovar...
Drej,
An PDF document in the following website may be helpful to you:
http://twist.lib.uiowa.edu/vibrations/Soln3-14.pdf
I am also trying to understanding the real meaning of displacement in ANSYS modal analysis, in which the switch "Nrmkey" in the command MODMOP is set to...
As drej mentioned above,
PSI(transpose)*[M]*PSI = 1 = modal mass matrix
Do the PSI means the mode shape, i.e., the eigenvectors?
Another important question:
I get different maximum displacement(DMX) for the first mode with different material property, e.g., modulus EX, so can I plot...
Hello all,
I am confused with the meaning of displacement Ux in ANSYS modal analysis.
In my modal analysis, the maximum length of the model is no more than 11e-3 m, but the modal results of first mode in ANSYS plotted that DMX = 149.608. The system of units of my model is SI, so do the DMX...
