The Opera-2d Direct Sparse Solver (DSS) option is now unlicensed. This means that all users of Opera-2d can benefit from the faster analysis time that this option allows without compromising accuracy.
The DSS option gives ~2-4 times speed-up depending on the type of analyses and the size of the model. A comparison of solution times for different analyses (ST, AC and RM) is shown in figures 1 and 2. For example, typically an RM-mechanically coupled analysis can be solved in less than an hour instead of ~ 3.5 hrs.