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Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › How to attach spring to a solid body › Reply To: How to attach spring to a solid body

August 16, 2019 at 11:43 am
peteroznewman
Subscriber

Modal analysis should always be done prior to solving a Transient Structural model. The natural frequencies provide useful information to help decide on time step sizes. Modal is also a useful diagnostic test on the connections in the model to see if the mode shapes behave as expected or if there is an error in the model. The Modal solution takes a lot less time than a Transient Structural. 


It is often useful to run a Static Structural model as a diagnostic test of a model prior to a Transient Structural because like Modal, it solves in less time than the Transient Structural. In your case, you want to know why a change in spring stiffness doesn't show a change in deformation.


Please drop both a Modal and Static Structural analysis system onto the Model cell of your Transient Structural and solve them. From the Modal, you can answer the question about the first natural frequency of the system. After you solve the Static Structural, you can select that block in Workbench and right mouse click on the block to Duplicate. That will give you an independent block that you can change the spring stiffness without affecting the original model. Reply with the maximum deformation from each Static Structural model and the first natural frequency.