| Author Name | Affiliation | | LIU Wen | School of Sciences,Yanshan University,Qinhuangdao 066004,China | | ZHANG Li-gong | School of Sciences,Yanshan University,Qinhuangdao 066004,China | | BAI Xiang-zhong | School of Civil Engineering & Mechanics,Yanshan University,Qinhuangdao 066004,China | | ZHANG Zhong-jian | School of Civil Engineering & Mechanics,Yanshan University,Qinhuangdao 066004,China |
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| Abstract: |
| In order to extend the rail life and improve the firing accuracy,the electromagnetic launcher’s rail can be modeled as a beam on elastic foundation with simply supported beam with moving load.Euler beam theory is applied to build the mechanical model and the analytical solution of the equation subjected to harmonic magnetic pressure is derived in details,which has successfully avoided the errors caused by using the uniform pressure to approximately replace the variable force.Numerical analysis of the dynamic response on rail by using the MATLAB software shows that the peak values of maximal deflection and vibration velocity increase gradually as the exciting frequency increases.Taking the same speed of load into account,the dynamic response of rail is obviously smaller than that under constant force.Therefore the reliable theory basis is provided for the design and control of rail to promote the practical application of electromagnetic launcher. |
| Key words: electromagnetic launcher’s rail harmonic pressure analytical solutions exciting frequency dynamic response |
| DOI：10.11916/j.issn.1005-9113.2011.06.023 |
| Clc Number:U213.2 |
| Fund: |
