Vibration reduction optimization of electromagnetic rail launchers based on stiffness matching

DOI:	10.11809/bqzbgcxb2023.04.022
Keywords:	electromagnetic rail launcher; stiffness matching; response surface methodology; damping performance
Abstract:	In order to better solve the vibration problem of an electromagnetic rail launcher in the launch process, this paper proposes two vibration reduction optimization schemes. One is the structural design of a double layer composite insulator; the other is the design of axial multi stiffness elastic support structure. For the two schemes, rail elastic support structure models are established respectively, mechanical characteristics of the insulator structure are analyzed, and stiffness matching of the rail elastic support structure is discussed. Based on the response surface method, a stiffness matching experiment is carried out, and a response surface model is established. The variable sensitivity is then analyzed, and the optimal elastic modulus combination of the double layer composite insulator is obtained according to the stiffness matching. Based on the modal analysis and the resonance of the launcher, a three stage axial multi stiffness elastic support structure is designed. The damping effects of the two optimization schemes are evaluated respectively. The results show that the above two vibration reduction schemes enhance the structural stiffness of the launcher and effectively reduce rail vibration.
Issue:	Vol. 44 No. 4 (2023)
Published:	2023-04-28
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