The problem usually results from too many constraints or lack of masses in the model.
The required number of the free vibration modes in the modal analysis is bigger than the number of the dynamic degrees of freedom. If the node contains an attribute such as a constraint or load, this attribute does not affect the calculation model. Occurs when model contains nodes not connected with any calculation element or structure object.
Isolated node with additional attributes found. It is not an obstacle in calculations, the results are correct.ĭisplays as a warning message whether it is an intended modeling effect. Occurs when the structure model consists of two or more separate parts. Bar superposition is not allowed during model conversion and simulation.ĭelete or move one of the beams in your assembly to resolve the error. Occurs when beams in your assembly are overlapping or are placed in the same spot. Occurs when there are large differences in section profiles of some elements or an abnormally short element exists. There is a suspiciously high ratio between maximum and minimum values on the diagonal of inverted stiffness matrix Instability (of type 3) detected at node XY. There is zero value element on the diagonal of inverted stiffness matrix. Instability (of type 2) detected at node XY. There is zero value element on the diagonal of stiffness matrix.Ĭaused by mechanical instability of a structure, when a part of the structure is a mechanism (too many releases or incorrect definition of releases, or the number, type and positions of constraints are not sufficient) Instability (of type 1) detected at node XY.
Use Frame Generator tools to add frames to your assembly to perform frame analysis. No frame members were found in the assembly. Apply material overrides in the Simulation environment or return to the Model environment and assign materials to the appropriate parts. Some materials are not defined correctly.Ĭlick Assign Materials to view the material status of the parts.
Results are accurate when no error or warning message displays.Īpply loads to your model to simulate the appropriate boundary conditions.Īpply constraints to your model to simulate the appropriate boundary conditions. We recommend resolving any warnings that are displayed to get correct analysis results. The results of the simulation are affected and invalid. For example, the simulation runs, and the warning message displays “Isolated nodes have been found.” Your frame model contains nodes not connected with any calculation element or structure object. However, there is a high probability that the results are invalid due to errors in your model.
The problem is not so critical to stop the simulation so the Results are obtained. The warning messages indicate some problem in your frame model. For example, “No constraint defined” error indicates that you did not defined any constraint to your model and simulation cannot proceed without any constraint defined. The error messages indicate a critical error in your model and the simulation cannot run. The error and warning messages are displayed in the separate dialog box, as well as in the Status folder in the browser. The Warning and Error icons associated with messages indicate whether the process can or cannot proceed without modification, respectively.
Following is a list of some warnings and errors that can occur when you run simulations and how to resolve them.