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Analysis on the Movement of Slungshot and Impact Force
Middle School Attached to University of Beijing Jiaotong, Beijing, China
Department of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, China
Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
- 1 Middle School Attached to University of Beijing Jiaotong, Beijing, China
- 2 Department of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, China
- 3 Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
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Abstract
Slungshots can be induced by earthquake, causing heavy damage to people. Preliminary study of this problem was carried out. First ly, a mathematical model for describing the movement of slungshot was presented based on the theories of rigid body kinematics and aerodynamics. The effects of air drag and the rotation of rock were considered. Secondly, the trail of movement and the velocity were studied based on the presented model, taking the slungshot recorded in the 5.12 earthquake in the Yingxiu County as example. Thirdly, the impact force of the slungshot on the ground was studied. This study provides a reference for the forecast and prevention of the slungshot hazard.
KeywordsMathematical Model for SlungshotMovement TrailImpact Force
- He, S.M., Wang, D.P., Wu, Y. and Ou, Y.C.H. (2014) Formation Mechanism and Key Prevention Technology of Rockfall. Chinese Journal of Nature, 36, 336-345. (In Chinese )
- Alejano, L., Stockhausen, H., Alonso, E., et al. (2008) ROFRAQ: A Statistics-Based Empirical Method for Assessing Accident Risk from Rockfalls in Quarries. International Journal of Rock Mechanics and Mining Sciences, 45, 1252-1272. https://doi.org/10.1016/j.ijrmms.2008.01.003
- Cui, P., Wei, F.Q., He, S.M., et al. (2008) Mountain Disasters Induced by the Earthquake of May 12 in Wenchuan and Disasters Mitigation. Journal of Mountain Science, 26, 280-282. (In Chinese )
- Xu, Q. and Huang, R.Q. (2008) Kinetics Characteristics of Large Landslides Triggered by May 12th Wenchuan Earthquake. Journal of Engineering Geology, 16, 721-729. (In Chinese)
- Wu, W.Y. (1982) Fluid Mechanics. Beijing University Press, Beijing. (In Chinese )
- Ye, T.L., Lu, X.B., Cui, P. and Zhang, X.H. (2011) Initial Study on the Movement of Slungshot during Earthquake. Chinese Journal of Underground Space and Engineering, 7, 1780-1791. (In Chinese )
- Dorren, L. (2003) A Review of Rockfall Mechanics and Modeling Approaches. Progress in Physical Geography, 27, 69-87. https://doi.org/10.1191/0309133303pp359ra
- Ye, S.Q., Chen, H.K. and Tang, H.M. (2010) Comparative Research on Impact Force Calculation Methods for Rockfalls. Hydrogeology & Engineering Geology, 37, 59-64. (In Chinese )
- Second Railway Survey and Design Institute, China, Technical Manual of Railway Engineering Design.Tunnel. China Railway Publishing House, Beijing, 141-191.
- Kawahara, S. and Muro, T. (2006) Effects of Dry Density and Thickness of Sandy Soil on Impact Response Due to Rockfall. Journal of Terramechanics, 43, 329-340. https://doi.org/10.1016/j.jterra.2005.05.009