删除或更新信息,请邮件至freekaoyan#163.com(#换成@)

考虑含水率干密度的土壤动态球形空腔膨胀理论

本站小编 Free考研考试/2021-12-21

本文二维码信息
二维码(扫一下试试看!)
考虑含水率干密度的土壤动态球形空腔膨胀理论
Dynamic Spherical Cavity Expansion Theory of Soil Considering Moisture Content and Dry Density
投稿时间:2020-05-27
DOI:10.15918/j.tbit1001-0645.2020.090
中文关键词:侵彻深度含水率干密度空腔膨胀理论Mohr-Coulomb屈服准则
English Keywords:penetration depthmoisture contentdry densitycavity expansion theoryMohr-Coulomb yield criterion
基金项目:国家自然科学基金资助项目(11390362,11572048)
作者单位
武海军北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081
曾费隐北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081
李金柱北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081
皮爱国北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081
摘要点击次数:479
全文下载次数:251
中文摘要:
为研究土壤含水率、干密度对弹体侵彻阻力的影响,通过引入含水率及干密度对土壤摩尔-库伦屈服条件进行修正,完成材料的动态球形空腔膨胀理论推导,获得考虑含水率及干密度的靶体阻力函数. 在此基础上对文献中的实验进行计算,并与实验数据及其他经验公式计算结果进行对比和分析. 结果表明,侵彻过程中材料空腔表面径向应力会随着含水率的增加而降低,随干密度的增加而增高;与经验公式及其他模型计算结果相比,考虑含水率干密度的计算模型具有更好的预测精度,可用于低速侵彻土壤的侵深计算.
English Summary:
In order to study the influence of soil moisture content and dry density on the penetration resistance of the projectile, the Mohr-Coulomb yield condition of soil was modified by introducing moisture content and dry density, the dynamic spherical cavity expansion theory of material was deduced, and the target resistance function was obtained. Based on this, experiment data in existing research were calculated, and they were and compared with the data in this experiment and other empirical formulas. The results show that the radial stress decreases with the increase of water content and increases with the increase of dry density in the process of penetration; compared with the results of empirical formulas and other models, the calculation model considering the dry density of water content has better prediction accuracy and can be used for the calculation of penetration depth of low-speed penetration soil.
查看全文查看/发表评论下载PDF阅读器
相关话题/科学 北京 技术 北京理工大学 实验室