Gang, L.; Xiao-jun, Z., and Jian-xun, C., 2018. The dynamic response of an experimental floating tunnel with different cross sections under explosive impact. In: Ashraf, M.A. and Chowdhury, A.J.K. (eds.), Coastal Ecosystem Responses to Human and Climatic Changes throughout Asia.

Using three floating tunnel section forms as the research objects (rectangular, circular, and elliptical), analysis of explosion shock wave response was determined. By using the finite element software LS-DYNA, the speed of a comparative study of three cross sections of pipe displacement, as well as acceleration, impact pressure, and structure stress, draw the following conclusions: (1) three sections of floating tunnel longitudinal horizontal displacement peak showed a W distribution, with a maximum displacement of less than 0.3 m and a vertical displacement that is smaller than the horizontal displacement; (2) peak velocity along the tunnel longitudinal distribution is in an inverted V shape, with the peak velocity of the elliptical section less than that of the rectangular and circular sections and a minimum value greater than the blasting safety regulation (GB6722-2014) limits; (3) the horizontal peak acceleration is greater than the vertical acceleration, with maximum and minimum oval, rectangular, circular, and rectangular peak acceleration exceeding the limit a human body can bear; and (4) in all three cross sections, the impact stress and the structural stress peak were less than 10 MPa. This is not enough to induce the structure into brittle failure, but a similar hydraulic structure allows a pressure peak.