This section contains information about feature enhancements that can affect program behavior or analysis results in ways that you may not expect. Also covered are known incompatibilities, notable issues and defects that have been resolved, and information about replacement capabilities for features that have been removed.
The following topics offer supplemental 2024 R2 product-update information presented by the Mechanical APDL development and testing teams:
If you are upgrading across several releases, you may find it helpful to consult the Update Guide sections of the archived release notes for Mechanical APDL.
For information about past, present, and future operating system support, see the Platform Support section of the Ansys Website.
Mechanical APDL Release 2024 R2 can read database files from all prior Mechanical APDL releases. Due to ongoing product improvements and defect resolutions, however, results obtained from old databases running in new releases may differ somewhat from those obtained previously.
The following Mechanical APDL feature updates in Release 2024 R2 are known to produce program behaviors or analysis results that differ from those of the prior release:
For single-field structural analyses (static and full transient), the logic
which selects the default Lev_Diff value has been
changed and will no longer automatically select a value of 1. For more
information, see PCGOPT.
The automatic constraint type detection logic (KEYOPT(5) = 0 of target element) has been revised so that larger percentages of assembly models can be solved by default with improved robustness and accuracy. For more information, see "TARGE170 Input Summary" in the Mechanical APDL Element Reference.
9.2.3. Change in behavior when issuing LSCLEAR,ALL
Up until and including 2023R1, issuing LSCLEAR,ALL caused the component based rotational (CMOMEGA) and translational (CMACEL) inertia loads to be set to zero.
Starting at 2023R2, LSCLEAR,ALL deletes the component based rotational and translational inertia loads. This leads to a change in behavior, in particular when using LSWRITE and LSSOLVE as previous load step loads remain active. Note that it is now consistent with the behavior of other types of loads.
The following issues are known to exist at Release 2024 R2:
Instability when using the Open MPI Library and Clusters Containing AMD Architecture with a High Core Count — When running a DMP analysis that uses the Open MPI library with clusters containing AMD architecture, the program may crash if the total core count is higher than 512. For more information on supported MPI software, see MPI Software in the Parallel Processing Guide.
For issues discovered following publication of this document, see Mechanical APDL in the Ansys Known Issues and Limitations.
The following notable issues and defects for Mechanical APDL have been resolved at Release 2024 R2: