沙漠沙休止角一种新的测定方法  

A new experiential measurement for the angle of repose of desert sand

作　　者：刘建宝[1] 王乃昂[1] 李亚军[1] 俞凯峰[1] 何苏峰[1] 王娜[2] 

机构地区：[1]兰州大学资源环境学院,兰州730000 [2]兰州大学物理科学与技术学院,兰州730000

出　　处：《兰州大学学报（自然科学版）》2010年第4期37-41,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家基础科学人才培养基金项目(J0730536);教育部国家大学生创新性试验计划项目(860083);国家自然科学基金项目(50879033)

摘　　要：用传统测试方法测试沙漠沙休止角存在系统误差,误差源于落体成锥过程中因冲击导致的锥顶秃顶和因惯性导致的锥底非平直.设计实验并用数理统计方法分析实验结果,验证了传统测试方法确实存在以上所述系统误差.针对传统测试方法的缺点,设计了新的测试方法,该方法方便快速、无系统误差.从理论分析的角度看,新方法能更好地反映沙漠沙休止角的实际值,并且新测试方法可以适用于更多特殊情况.It was pointed out that the traditional method to measure the repose angle of desert sands induces system errors, and such errors are caused by the bald top cone and also by the non-linear bottom. System errors are proved to exist by analyzing the results of designed experiment using the statistic method. Aiming at solving those errors, a new method was brought forth, which is convenient, time-saving and leading to no system error. From a theoretical view, the new method is better in reflecting the real value of the repose angle and can be applied to more special situations.

关 键 词：沙漠沙 休止角 测量方法 误差模型 

分 类 号：P931.3[天文地球—自然地理学]