1.大连民族学院土木建筑工程学院，大连116600 ; 2.哈尔滨工业大学深圳研究生院，深圳518055; 3.哈尔滨工业大学土木工程学院，哈尔滨150090; 4.Smart-Tech Centre, Institute of Fundamental Technological Research, Polish Academy of Sciences, 02-106, Warsaw, Poland
Experimental validation of a fast dynamic load identification method based on load shape function
1.School of Civil and architecture Engineering, dalian national university, dalian 116600, china;
2.harbin institute of technology shenzhen graduate school, shenzhen 5180553,china;
3.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China4. Smart-Tech Centre, Institute of Fundamental Technological Research, Polish Academy of Sciences, 02-106, Warsaw, Poland
Abstract：A dynamic load identification method was introduced and complemented, in which the force was approximated using the shape functions from the finite element theory. The computational work is deduced a lot by calculating the weights of shape functions instead of indentifying the discrete load time history. It improves the performance of the deconvolution method in a long sampling time or high sampling frequency. Moreover, it improves the ill-conditioning of the inverse problem, and increases the robustness to noise. A numerical continuous beam compares and verifies that the load can be identified precisely by this method with 5% Gaussian noise pollution. In a cantilever beam experiment, via the measured structural responses, this method enables the online load identification which is performed repeatedly in a moving time window.
2011, Vol. 30 
