薄壁结构动力计算中若干问题
On Some Problems in Dynamic Computation for Thin-Walled Structures
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摘要: 本文讨论薄板和薄壳之类的薄壁结构受冲击荷载作用时的动力计算问题.主要是求动力因数.在计算中考虑了冲击物和被冲击的薄壁结构系统质量的影响;用相当质量法将薄壁结构的分布质量转化为只有一个集中的相当质量,从而导出薄壁结构系统在冲击力作用下的动力因数,计算比较方便.Abstract: This article discusses the problems of the dynamic computation for thin-walled structures such as thin plates and thin shells under impact load to find the dynamic factor mainly.In calculation we take into account the effect of the mass of the striking object and the system of thin-walled structures to be struck and transform the distributed mass of thin-walled structures into only one concentrated "equivalent mass" by the method of reduced mass.Accordingly we derive the dynamic factor for the system of thin-walled structures under impact load.
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[1] Timoshenko,S.,Vibration Problems in Engineering,Second Edition(1937). [2] Filippov,A.P.,Vibration in Elastic System,Ed.by Acad.Scien.Ukrain.SSR(1956). [3] Saint-Venant,B.,Theory of Elasticity of the Solids,Paris,Parag.,61(1883),490. [4] Love,A.E.H.,Math.Theo.of Elast.(1927),198. [5] Timoshenko,S.and S.Woinowsky-Krieger,Theory of Plates and Shells,Second Edition,McGraw-Hill Book Comp.Inc.(1959). -
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