I have some problems with calculations in Abaqus. I am trying to calculate free vibrations. I consider plate ( section - shell), simply supported plate. I want to check the impact of forces subjected in the edge of the plate (graph2) on first four frequencies mode (graph 2). Unfortunetaley, if I change the value of the force it doesnt show any change in the result of mentioned frequencies. I don't know how can I change the options in Abaqus to obain expected results. Any your help would be extremely appretiated.