Mechanical APDL Structural Analysis Guide
Chapter 4: Harmonic Analysis Any sustained cyclic load will produce a sustained cyclic response (a harmonic response) in a struc ...
Typical harmonic system. Fo and Ω are known. uo and Φ are unknown (a). Transient and steady-state dynamic response of a structur ...
4.3.2. The Mode-Superposition Method The mode-superposition method sums factored mode shapes (eigenvectors) from a modal analysi ...
4.4.2.1. Modeling Hints Both a linear constitutive model and mass must be defined. Material properties may be linear, isotropic ...
Com- GUI Path mand Option Main Menu> Solution> Analysis Type> Analysis Options Solution Listing Format HROUT Main Menu& ...
4.4.3.3. Apply Loads on the Model A harmonic analysis, by definition, assumes that any applied load varies harmonically (sinusoi ...
Figure 4.3: An Unbalanced Rotating Antenna Plan 2 1 3 4 Frameof Reference Ωt Elevation W Rotating antenna 4 - pointsupport Ω (Fr ...
Cmd GUI Path Family Load Type Category Main Menu> Solution> Define Loads> Ap- ply> Structural> Force/Moment Force ...
Apply Set- tings Solid Entity Apply Delete List Operate Model or FE Load Type BFK- BFKLIST BFTRAN - DELE Keypo- BFK ints Solid M ...
Option Command GUI Path Main Menu> Solution> Load Step Opts> Other> Change Mat Props> Material Mod- els> Struc ...
Damping in some form should be specified; otherwise, the response will be infinity at the resonant frequencies.ALPHAD and BETAD ...
4.4.3.7. Repeat for Additional Load Steps Repeat the process for any additional loads and frequency ranges (that is, for additio ...
GUI: Main Menu> TimeHist Postpro> Define Variables Note The NSOL command is for primary data (nodal displacements), the ES ...
GUI: Main Menu> General Postproc> Plot Results> Vector Plot> Predefined Use PLNSOL or PLESOL to contour almost any r ...
4.5.3. Problem Diagram Figure 4.4:Two-Mass-Spring-System Problem Sketch k 1 kc k 2 m 1 m 2 F1 sin ωt Representative Finite Eleme ...
Click on Add. The Element Type for Real Constants dialog box appears. Click once on Type 1 to highlight it. Click on OK.The Rea ...
Click once on nodes 2 and 3. Click on Apply. A line appears between the selected nodes. Click once on nodes 3 and 4. Click on O ...
4.5.3.8. Define Loads and Boundary Conditions Choose menu path Main Menu> Solution> Define Loads> Apply> Structural ...
Enter 2 for reference number of variable. Enter 2 for node number. Enter 2UX for the user-specified label. In the scroll box on ...
Click on OK. A graph appears in the graphic window. 4.5.3.11. Exit ANSYS You are now finished with this sample problem. In th ...
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