Expert Tip: Why Not Solving Dynamic Problems Using Excel?
What is the Equilibrium Equation for Dynamic Problems? The equilibrium equation for any dynamic problem can be expressed as Eq (1). Eq (1) is just an extension of a more familiar equilibrium equation for a static problem. Figure 1. Representation of a simple static spring system. In Eq (2), F is the applied force, k is the stiffness, and y is the displacement. We know F and K, so we can calculate y. In other words, we have only one unknown y, so we can calculate y. In Eq (1), F(t) is the applied force, k is the stiffness, and y(t) is the displacement just like in Eq (2). y(t) varies along time t because applied load F(t) varies along time t.