Structural dynamics

Answer -

Static analysis 

The structural analysis focuses on the changes occurring in the behavior of a physical structure under observation when provided with a force or in case of structures,load.Now if this load is very slow the inertia forces from the basis of newton's first law of motion can be neglected and the analysis becomes static.The static loads are very slow on the time rate graph.Static structure analysis methods are:

• non-linear static analysis
• Linear static analysis

Dynamic analysis 

If the force or load applied have a high rate of change of velocity during the process then it comes under DYNAMIC analysis,the cause and effect portion comes in to play here.The system under consideration is observed for the development occurring during a course of time and then analyzing the cause of those changes. A dynamic analysis is also related to the inertia forces developed by a structure when it is excited by means of dynamic loads applied suddenly (e.g., wind blasts, explosion, earthquake).