IMHE OpenIR  > 山地灾害与地表过程重点实验室
Alternative TitleAmending calculation on impact force of boulders in debris flow based on Hertz theory
陈剑1,2,3; 王全才1,2; 陈颖骐1,2,3; 李 俊1,2,3
Corresponding Author王全才
Source Publication哈尔滨工业大学学报
Other Abstract



Impact model between boulder and pier was built based on the Hertz contact theory and structural mechanics. Three main influence factors of impact force, including the material properties, relative size, and structure displacement were quantized and the modified formula was presented to calculate impact force. The research shows that, material correction coefficient ranges from 0.20 to 0.45, which is proportional to material yield strength Y while correlated reciprocally with the equivalent modulus of system, E. The correction coefficient of ball diameter ratio exhibits that, along with the increase of structure size, it increases stably after rapid growth. Structure displacement correction coefficient is affected by the constraint condition of pier top and impact location. The practical application of this modifier formula in Dengjigou engineering result is only 6.7% of the calculated value by Hertz elastic collision theory, and according to the outcome that, relation curves between impact force and impact velocity is relatively flat. It performs in accordance with practical estimation.

Keyword泥石流 大块石冲击力 Hertz接触力学 结构变位 修正因子
Subject Area工程与技术科学基础学科其他学科
Indexed ByEI ; CSCD
Accession numberAccession number:20171103433730
Citation statistics
Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
陈剑,王全才,陈颖骐,等. 基于Hertz理论的泥石流大块石冲击力修正计算[J]. 哈尔滨工业大学学报,2017,49(2):124-129.
APA 陈剑,王全才,陈颖骐,&李 俊.(2017).基于Hertz理论的泥石流大块石冲击力修正计算.哈尔滨工业大学学报,49(2),124-129.
MLA 陈剑,et al."基于Hertz理论的泥石流大块石冲击力修正计算".哈尔滨工业大学学报 49.2(2017):124-129.
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