Experimental and Numerical Investigations of Vibrations at a Railgun with Discrete Supports

Research on strain testing technology of electromagnetic railgun’s abnormal barrel

“…However, this method only measured the strain in the length direction of the barrel, did not consider the strain in the track width direction and other parts of the barrel, and did not consider the performance of the test system.Young Hyun Lee et al [6] in order to verify the dynamic response characteristics of electromagnetic railgun, the strain values of four points in the track length direction were measured by FBG Optical fiber sensor, and the changes of track strain under different launch voltages were given. However, this method can not deeply and completely study the strain of special-shaped barrel, and only a few points were compared through test and simulation.In addition, reference [7] and reference [8] also studied the measurement of track dynamic response. Taking the self-developed special-shaped barrel launch platform as the object, according to the characteristics of electromagnetic launch environment and special-shaped structure of barrel, this paper proposes a strain test method of special-shaped barrel based on Fiber Bragg grating sensing, carries out the strain test of special-shaped barrel of electromagnetic railgun, obtains the strain values of multiple parts of special-shaped barrel, and obtains the multi-point strain simulation results on the track through simulation calculation.The comparison between the two shows that the test results based on this method are reliable.…”