ANALYSIS AND EXPERIMENT ON TRANSIENT DYNAMIC RESPONSE IN FINITE MINDLIN PLATE |
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Authors: | Fengming Li Chunchuan Liu Tingwei Liang |
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Institution: | 1. College of Mechanical Engineering, Beijing University of Technology, Beijing 100124, China 2. P.O.Box 137, School of Astronautics, Harbin Institute of Technology, Harbin 150001, China |
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Abstract: | The transient wave propagation in the finite rectangular Mindlin plate is investigated by the analytical and experimental methods. The generalized ray method (GRM) which has been successfully applied to study the transient responses of beams, planar trusses, space frames and infinite layered media is extended to investigate the transient wave propagation and early short time transient response in finite Mindlin plate. Combining the wave solution, the shock source and the boundary conditions, the ray groups transmitted in the finite rectangular plate can be determined. Numerical simulations and experiments are performed and compared with each other. The results show that the transient wave propagation and early short time transient responses in the finite plate can be studied using the GRM. The early short time transient accelerations are very large for the finite plate subjected to the unit impulse, while the early short time transient displacements are very small. The early short time transient accelerations under the unit impulse are much larger than those under the unit step impulse. The thickness and material characteristics have remarkable effects on the early short time transient responses. |
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Keywords: | finite Mindlin plate transient wave propagation early short time transient response generalized ray method |
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