Transient response of structures with uncertain properties to nonlinear shock loading

被引:13
作者
Caresta, Mauro [1 ]
Langley, Robin S. [1 ]
Woodhouse, Jim [1 ]
机构
[1] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England
基金
英国工程与自然科学研究理事会;
关键词
IMPACTS; WAVES;
D O I
10.1016/j.jsv.2013.06.014
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
A method is presented to predict the transient response of a structure at the driving point following an impact or a shock loading. The displacement and the contact force are calculated solving the discrete convolution between the impulse response and the contact force itself, expressed in terms of a nonlinear Hertzian contact stiffness. Application of random point process theory allows the calculation of the impulse response function from knowledge of the modal density and the geometric characteristics of the structure only. The theory is applied to a wide range of structures and results are experimentally verified for the case of a rigid object hitting a beam, a plate, a thin and a thick cylinder and for the impact between two cylinders. The modal density of the flexural modes for a thick slender cylinder is derived analytically. Good agreement is found between experimental, simulated and published results, showing the reliability of the method for a wide range of situations including impacts and pyroshock applications. (c) 2013 Elsevier Ltd. All rights reserved.
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页码:5821 / 5836
页数:16
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