is a numerical software leading to an automated determination of static and dynamic response of mechanical systems in a computationally efficient way. It is used for systems of critical importance and safety, like for predicting the behavior of automotive, aerospace, marine and civil engineering structures. These systems are discretized by finite elements. Frequently, this leads to models with an excessive number of degrees of freedom and strongly nonlinear characteristics. Therefore, a central concept of the code is to provide the option of reducing drastically the order of a system, without sacrificing numerical accuracy. Apart from increasing the computational efficiency and speed, this reduction renders amenable the application of techniques, which are efficient for low order systems only.
An important new feature of is the option to impose enforced motion (SPCD) through both linear and nonlinear connecting elements. For instance, this option is needed when studying ride response of a ground vehicle possessing nonlinear suspensions. Likewise, the same option is also useful in studying the dynamic response of buildings and other complex structures when subjected to earthquake excitation, through linear or nonlinear foundations.