Subdomain Precise Integration Method for Periodic Structures

Figure 10

The relative errors for Example 2. SPIM with and time step  s (solid line), SPIM with and time step  s (), SPIM with and time step  s (□), Newmark method with time step  s (○), and Newmark method with time step  s ().

(a) Relative errors of the displacement vectors

(b) Relative errors of the velocity vectors