Ansys Assistant will be unavailable on the Learning Forum starting January 30. An upgraded version is coming soon. We apologize for any inconvenience and appreciate your patience. Stay tuned for updates.
Structural Dynamics

Structural Dynamics

  1. All Categories
  2. Structures - Structural Dynamics
  3. Is it possible to plot principal stresses from a PSD (random vibration) analysis?

Is it possible to plot principal stresses from a PSD (random vibration) analysis?

Tagged: 11, mapdl, Mechanical APDL (f. ANSYS), Modal/Harmonic Response, structural-dynamics, structural-mechanics
    • March 17, 2023 at 9:00 am
      FAQFAQ
      Participant

      In ANSYS Release 11.0, it is not possible to plot principal stresses from a PSD analysis. The capability to plot of principal stresses from a PSD analysis was removed in Release 8.1. The stress components from PSD analyses are 1-sigma results, so they do not have an associated sign. Using these statistical stress components to calculate derived stress quantities is not appropriate. The equivalent stress (SEQV) is determined using the Segalman-Reese approach, which considers the probability distribution of equivalent stress. The Segalman-Reese approach does not cover principal stresses.

Featured Articles

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.

© 2026 Copyright ANSYS, Inc. All rights reserved.