waarts {mistral}

A limit-state-function defined by Waarts

Description

The limit-state function is defined by:

b1 = 3 + (u_1-u_2)^2/10 - sign(u_1 + u_2)*(u_1+u_2)/sqrt(2)

b2 = sign(u_2-u_1)*(u_1-u_2)+7/sqrt(2)

f(u) = min(b1, b2)

Usage

waarts

Format

The function can handle a vector or matrix with column vectors.

References

Waarts, PH:
An appraisal of DARS: directional adaptive response surface sampling
Delft University Press, The Netherlands, 2000.