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چکیده
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In some cases, impulse- or shock-type excitations as the dynamic loading are inevitable, and obtaining proper response with the wellknown numerical methods is not easy. (is paper focuses on dynamic response estimation against short-time loading with an updated finite element model using frequency response functions (FRF) and particle swarm optimization (PSO) technique. Because there is not an analytical method for assessing the numerical responses under shock-type excitations, in this paper, experimental tests are designed on a laboratory scale to evaluate the numerical responses. (e vibration responses of the system against shock loading are compared with the Newmark average acceleration scheme and also with experimental data. (e results reveal that the unconditionally stable Newmark method against regular loads has an appropriate performance. Still, under short-time loading, it faces numerical damping error, and this method should not be blindly applied under shock-type loads.
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