Learning Forum

[MOHAMMAD11]

[MOHAMMAD11]

Thanks guysn

[Chris Quan]

It's not possible to apply a boundary condition to a point mass.nMass represents inertia force so it is important to have accurate mass in dynamic simulations. If a body in a component system has the deformation that can be ignored in the analysis or has minimum effect on the analysis results, point mass can be used to represent this body to simplify the model without compromising accuracy. nIf acceleration BC is applied to this body and the acceleration BC will greatly affect the analysis results, this body should not be simplified as point mass. You should not model it as a point mass.n

[MOHAMMAD11]

You are right.nIn the explicit analysis of Ansys19, it's not possible to apply acceleration in a tabular data. Is it the same in other versions? And whether this acceleration must apply to the center of mass in structure or not? How can I apply acceleration for 30 seconds in different steps?nThank you for your attentionnn

[Chris Quan]

Acceleration can be applied in the tabular form. See the picture below. nAcceleration BC is applied to all nodes if it is a flexible body and the center of mass if it is a rigid body.nnn

[MOHAMMAD11]

Dear cxquan nThank you so muchnn