TABU SIMULATED ANNEALING COMPLEX METHOD AND ITS APPLICATION TO SLOPE STABILITY ANALYSIS

For a randomly generated initial complex,the bad design point will be operated firstly whose similarity degree is the biggest to other design points,and a new design point would be generated by simulated annealing optimization operator with tabu idea on the line through the bad design point and the center of the remaining design points. If no new design point is found to replace the bad design point,another design point which has the second maximum similarity degree is chosen to be simulated annealing calculation,and the process will be continued until all the design points are chosen to be simulated annealing calculation and no new design points found. After then the improved complex optimization calculation would be continued for the current complex. In this process,the same reflection and retraction operator to basic complex method is employed. Not only the improvement on the objective function value but also the maintenance of the diversity of the complex is considered in the improved complex method;and the local optimization would be avoided. The tabu simulated annealing complex method is applied to searching the critical failure surface of two nonhomogeneous soil slopes. The result shows that the ability of the improved complex method to find optimum is stronger than that of the basic complex method.