Shock Response Spectrum Testing Technical Research

In mechanics environmental test, it is the current tendency of shock test development that using shock response spectra (SRS) to assess aerial vehicle suffered diversified shock. However, due to the weak foundation of SRS testing technology in domestic research development, the crucial technical issue of generalizing SRS test is to make SRS realized in laboratory, which can simple simulate all kinds of mechanics environmental testing. In the dissertation, based on the analysis of theory, the method to realize SRS in laboratory was researched in detail by using the computer simulation. And this method is verified in test. The work done in the paper is significant in direction for doing the similar response spectrum test.In the area of theoretical calculation, the relationship between the natural frequency of single degree freedom system and the response peak is derived. Additionally, after studying the difference of several computing methods about SRS, one of them is selected. A computation program for SRS is written based on this selected method, and it successfully passes the program reliability verification.In the area of computer emulation, first, using the method of finite element, the drop test which generates SRS from dropping resonance plate onto shock platform is simulated. Then, a more detailed research about the relationship between SRS and the influencing factors such as natural frequency of resonance plate and boundary condition is done. Finally, the key influencing factors of SRS are gotten, and a plan, which can simplify generate SRS from resonance plate, is designed in the dissertation.In the area of laboratory verification, the design of resonance plate is completed. Furthermore, installing and testing this plate is also done. Then, diversified SRS curves is obtained by changing shock excitation condition, and the result of computer emulation is verified.