A hybrid inversion method of damped least squares with simulated annealing used for Rayleigh wave dispersion curve inversion

作者：Lu Jianqi; Li Shanyou^*; Li Wei; Tang Lihua

来源：Earthquake Engineering and Engineering Vibration, 2014, 13(1): 13-21.

DOI：10.1007/s11803-014-0208-2

• damped least squares
• simulated annealing
• hybrid inversion
• dispersion curve
• Rayleigh wave

Surface wave methods are becoming increasingly popular in many geotechnical applications and in earthquake seismology due to their noninvasive characteristics. Inverse surface wave dispersion curves are a crucial step in most surface wave methods. Many inversion methods have been applied to surface wave dispersion curve inversion, including linearized inversion and nonlinearized inversion methods. In this study, a hybrid inversion method of Damped Least Squares (DLS) with Very Fast Simulated Annealing (VFSA) is developed for multi-mode Rayleigh wave dispersion curve inversion. Both synthetic and in situ field data were used to verify the validity of the proposed method. The results show that the proposed method is superior to the conventional VFSA method in aiming at global minimum, especially when parameter searching space is adjacent to real values of the parameters. The advantage of the new method is that it retains both the merits of VFSA for global search and DLS for local search. At high temperatures, the global search dominates the runs, while at a low temperatures, the local search dominates the runs. Thus, at low temperatures, the proposed method can almost directly approach the actual model.

• 出版日期2014-3
• 单位新疆维吾尔自治区地震局; 中国地震局; 中国地震局工程力学研究所