Caesar II makes snubbers active for dynamic analysis. Modal analysis suggests that addition of snubbers result in higher natural frequency of the piping system.

In reality snubbers will lock up when the force acts quickly on piping, such as slug loads.

My question is whether use of snubbers is a legitimate way to stiffen up piping system subject to vibrations, for example, due to a two phase flow. Will snubbers be effectively locked up in such cases? Caesar II seems to suggest so.