Abstract: When the traditional L-curve method is applied， it is often not easy to obtain accurate regularization parameters. Therefore， a new regularization parameter determination method of ICAA(inverse computation-contrast-adjustment-approach)based on Newmark-β was proposed. Compared with the traditional L-curve method， the algorithm is more intuitive and simple to use， and the calculation time is shorter and more efficient. The validity of the algorithm was verified by a simulation example of a four-DOF system and an experiment of a cantilever beam， and the load identification results of this algorithm were compared with the load recognition results of the L-curve method. The results showed that compared with the L-curve method， the proposed algorithm not only has greater advantages in computational efficiency， but also has higher accuracy in load identification calculation using the regularization parameters obtained by the algorithm.

Key words: regularization parameter, L-curve method, load recognition identification, Newmark-β, computational efficiency