How does PLCAMP sort modes to be sure a mode is plotted consistently by the same line? How does it determine whether the whirl is backward or forward?

Learning Center
- Guided Learning Path
Free Courses
Learning Tracks
Certifications
Premium Learning
Knowledge
Streaming
Ansys Learning Hub
Events
Help

Structural Dynamics

All Categories
Structures - Structural Dynamics
How does PLCAMP sort modes to be sure a mode is plotted consistently by the same line? How does it determine whether the whirl is backward or forward?

How does PLCAMP sort modes to be sure a mode is plotted consistently by the same line? How does it determine whether the whirl is backward or forward?

Tagged: 13, Mechanical APDL (f. ANSYS), rotordynamics, structural-dynamics, structural-mechanics

- June 5, 2023 at 7:04 am
  
  FAQ
  Participant
  
  A correlation matrix for the modes is computed using RSTMAC to sort the modes. To determine the whirl of a rotating structure we do the following. At each node we calculate the cross-product between the displacement vector and the derivative of the displacement vector. Then we compare it to the spin. We calculate a global whirl by taking an average of all the “nodal” whirls.

Introducing Ansys Electronics Desktop on Ansys Cloud

The Watch & Learn video article provides an overview of cloud computing from Electronics Desktop and details the product licenses and subscriptions to ANSYS Cloud Service that are...

How to Create a Reflector for a Center High-Mounted Stop Lamp (CHMSL)

This video article demonstrates how to create a reflector for a center high-mounted stop lamp. Optical Part design in Ansys SPEOS enables the design and validation of multiple...

Introducing the GEKO Turbulence Model in Ansys Fluent

The GEKO (GEneralized K-Omega) turbulence model offers a flexible, robust, general-purpose approach to RANS turbulence modeling. Introducing 2 videos: Part 1 provides background information on the model and a...

Postprocessing on Ansys EnSight

This video demonstrates exporting data from Fluent in EnSight Case Gold format, and it reviews the basic postprocessing capabilities of EnSight.

Trending Articles

In Workbench Mechanical, how can I obtain strain energy output for Modal analysis?
How to define variable thickness shell elements in ANSYS Mechanical? Is there any verification example of the variable thickness shell modal analysis available?
How to setup Initial, Minimum and Maximum time step in Transient analysis?
Why is damped frequency is lower than undamped frequency with viscous damping but larger with structural damping?
How to apply application-based settings to improve the performance and robustness of transient structural analyses?
In the results of a modal analysis, how can I define that a frequency is an output parameter ?
How to include effect of bolt pretension in a modal analysis?
How can I specify acceleration at a node? Could I use the ‘big mass method’?
Presentation on shock analysis using response spectrum and transient dynamics
In a Modal Analysis of Mechanical, why aren’t the Participation Factors Summary under Solution Information displayed?

See all

Top Rated Tags

18.2
mechanical
Modal/Harmonic Response
structural-dynamics
structural-mechanics
19

See all

Legal Notices
Privacy Notice
Cookie Policy
Export Compliance
Terms & Conditions
Data Subject Rights Policy

Structural Dynamics

How does PLCAMP sort modes to be sure a mode is plotted consistently by the same line? How does it determine whether the whirl is backward or forward?

Introducing Ansys Electronics Desktop on Ansys Cloud

How to Create a Reflector for a Center High-Mounted Stop Lamp (CHMSL)

Introducing the GEKO Turbulence Model in Ansys Fluent

Postprocessing on Ansys EnSight

New Post - - Structural Dynamics