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Showing results for tags 'Modal analysis'.
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Hi everyBody I have a steel frame with a steel plate in the centre, with applied a pressure load; at the exteems of frame i have 4 constrains locking DOF1 DOF2 and DOF3; I have used beam element to create the frame and shell elements to create the plate; I have applied a certain pressure on the shell elements, but i need a impulsive load, how can i create it? How can i perform a transient modal analysis? witch load collectors i need to create? Here there are three images to help you to understand. After that i have to output the values of bending moments, shear and normal stress near a intersection of 3 beams element in the frame; then model the intersection with a 3D and apply the loads i have found from the transient modal Analysis. Where can i reed these kind of values concerning a node of the frame? thank for the support Damir
Dear Members, my problem is the following: I want to calculate the frequency modes of a gearbox-housing that consists of two parts screwed with a flange, using OptiStruct as solver. A validated approach that I want to try is modelling the screws as a bar-element that connects two mpc-rigids, one in the thread-area an the other in the area of the screw-head. The problem that I have is the connection of the two meshes (3D-parabolic with tetra-elements) of the parts in the flange-area. Simply connecting the whole flange leads to unsatisfactory results so that I just want to connect the flange areas in a certain radius auround the axis of the screw. My first idea was using the area-connector to create rigid-elements, but I still have problems to understand, how it works and if its even possible to do it in that manner. When I select "elems" in the location-botton of the area-panel and "rigid" as type no area-connectors are created independent of every other option chosen. Using "node list" leads to really strange connections and its hardly possible to even achieve a creation of some connections. Does anyone have an indea of a different approach connecting the flange-areas? As far as I know defining a contact is not possible for a modal analysis due to linearity. Thank you very much in advance!!