Blast Load Input Estimation of the Medium Girder Bridgeusing Inverse Method

Defence Science Journal

Ming-Hui Lee¹  Tsung-Chien Chen¹ 

[1] National Defense University, Tao-Yuan

关键词: Input estimation;    Kalman filter;    blast loads;    medium girder bridge;    truss structure system;    recursive least square estimator;    RLSE;    finite element method;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Defence Scientific Information & Documentation Centre

【 摘 要 】

Innovative adaptive weighted input estimation inverse methodology for estimating theunknown time-varying blast loads on the truss structure system is presented. This method isbased on the Kalman filter and the recursive least square estimator (RLSE). The filter models thesystem dynamics in a linear set of state equations. The state equations of the truss structureare constructed using the finite element method. The input blast loads of the truss structuresystem are inverse estimated from the system responses measured at two distinct nodes. Thiswork presents an efficient weighting factor  applied in the RLSE, which is capable of providinga reasonable estimation results. The results obtained from the simulations show that the methodis effective in estimating input blast loads, so has great stability and precision. Defence Science Journal, 2008, 58(1), pp.46-56 , DOI:http://dx.doi.org/10.14429/dsj.58.1622

【 授权许可】

Unknown