| Summary: | 碩士 === 國立屏東科技大學 === 機械工程系所 === 98 === This works aims to develop the analysis method for geometry design of half-sine wave programmers that are attached to the bottom of the shock table. The shock wave on the top of the shock table can then comply with the shock test specification, in terms of wave form, acceleration peak and shock impact duration time. The structural strength and fatigue of the shock table with the attached half-sine wave programmers during shock testing is also predicted and evaluated. First, the half-sine wave programmer with prescribed geometry of mounted to the bottom of the shock table is performed practical shock tests. The shock impact analysis is also conducted by the finite element analysis (FEA) software. Both experimental and analytical results are compared to verify the correctness of simulation. Next, the theoretical prediction method for determining the geometry of the half-sine wave programmers base on the assumption of single degree of freedom (SDOF) model is developed. From the specified acceleration peak value and impact duration time, the programmer geometry can be inversely predicted and verified in comparison to practical shock tests. Finally, the shock impact simulation for the shock table with and without the attached half-sine wave programmers are, respectively, performed to study the structural strength under the shock impact. The mass effect of device under test (DUT) on the shock table strength is also studied to discuss the generation of wave form, acceleration peak and impact duration. This work develops the inverse design method for the half-sine wave programmers as well as the shock impact simulation and its verification and will be beneficial to the research and development of shock test machines.
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