结构动力学环境激励试验准实时仿真技术研究

In this paper, follow real-time simulation technology of structural dynamic ambient excitation test is researched, which is based on dynamic matrix transform technology. Firstly, dynamic reduction of the finite element model is done, and then the dynamic response of reduction free-degree under frequency domain is calculated by matrix transform after Fast Fourier Transform is implemented to the dynamic response time history data of part test free-degree, lastly, Inverse Fast Fourier Transform is implemented to the dynamic response data of reduction free-degree and the dynamic response time history data of whole free-degree of the finite element model can be obtained by inverse transform of reduction transform matrix, and the visual simulation of the structural vibration response is completed by the aid of simulation software. Calculation and simulation on a shell structure in this paper is done, and the results are satisfying, the feasibility and effectiveness of the researched technology is demonstrated.