引用本文: 黄连芬, 李瑞园. 基于理想弹塑性假定的滚石冲击力计算方法研究1)[J]. 力学与实践, 2021, 43(5): 712-721.
HUANG Lianfen, LI Ruiyuan. RESEARCH ON A CALCULATION METHOD OF ROLLING STONE IMPACT FORCE BASED ON IDEAL ELASTIC-PLASTIC HYPOTHESIS1)[J]. MECHANICS IN ENGINEERING, 2021, 43(5): 712-721.
 Citation: HUANG Lianfen, LI Ruiyuan. RESEARCH ON A CALCULATION METHOD OF ROLLING STONE IMPACT FORCE BASED ON IDEAL ELASTIC-PLASTIC HYPOTHESIS1)[J]. MECHANICS IN ENGINEERING, 2021, 43(5): 712-721.

## RESEARCH ON A CALCULATION METHOD OF ROLLING STONE IMPACT FORCE BASED ON IDEAL ELASTIC-PLASTIC HYPOTHESIS1)

• 摘要: 通过常规方法所得的滚石冲击力计算结果远大于实际工况,为提升工程设计的经济性,以悬臂梁和简支梁两种结构为代表,推导了考虑材料弹塑性特性的冲击力计算方法。采用能量守恒定律将滚石冲击-结构受荷的能量转换过程按阶段进行了分解,计算了结构受荷后的最大压入变形,并推导出滚石最大冲击力,最后引入工程实例,与LS-DYNA数值计算结果对比,发现：与Hertz弹性接触理论、《规范》推荐的计算方法相比,弹塑性修正解更接近实际工况。

Abstract: The calculation result of the impact force of the rolling stone obtained by the conventional method is much larger than that under the actual working condition. In order to improve the efficiency of the engineering design, an impact force calculation method is developed by considering the elastoplastic characteristics of the material for two structures, i.e., the cantilever beam and the simply supported beam. Based on the conservation of energy, the energy conversion processes during the impact of the rolling stone and the structure under load are classified into distinct stages. The maximum indentation deformation of the structure after the load was calculated, and the maximum impact force of the rolling stone was determined. Finally, the method developed in this paper was applied to a practical engineering problem, and the results were compared with those obtained by LS-DYNA. It is found that the present method provides better results than those calculated by Hertz elastic contact theory or by the method recommended by the "Code", when comparing calculations with practical measurements.

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