Rigid Regions in ANSYS Modeling Techniques

This guide discusses the concept of rigid regions in ANSYS modeling, detailing methods for their implementation to optimize simulation efficiency. It outlines three primary approaches for modeling rigid regions: using high stiffness plane/solid elements, high stiffness link elements, and constraint equations (CERIG). Each method is described with its advantages and potential drawbacks. The guide emphasizes that while Method A can lead to a high element count, Method B is widely used due to its versatility across various cases. Method C utilizes CERIG to create a perfectly rigid region, highlighting the importance of setting the Mass21 key option correctly. Additionally, the guide provides specific case studies demonstrating the application of these methods, including the necessary geometry and boundary conditions for each case. The document serves as a practical resource for ANSYS users looking to enhance their modeling techniques by effectively incorporating rigid regions into their simulations.