Finite Element Model Updating of Bridge Structures Based on Improved Response Surface Methods

Figure 5

Augmented polynomial-based response surface model for the natural frequencies of the simply supported beam: (a) vertical first-order frequency response surface model, (b) vertical second-order frequency response surface model, (c) vertical third-order frequency response surface model, and (d) vertical fourth-order frequency response surface model.

(a)

(b)

(c)

(d)