风沙床面颗粒起动临界受力平衡模型的对比分析

摘要/Abstract

摘要： 风沙颗粒起动的受力平衡模型是风沙起动机制研究的重要内容。根据已有的研究成果,论述风沙颗粒起动的临界条件,介绍几种代表性模型。认为,影响自然状况下颗粒起动过程的因素是复杂的,尽管对主要影响因素的作用还未获得深入的认识,但是已提出的风沙颗粒起动的受力平衡模型对于认识风沙起动过程和机理具有重要的指导和启发作用,然而这些模型往往包含了较多的简化、假设以及有待于通过实验测定的系数,所以,不能够在实践中直接应用。而且,这些模型都是在特定的条件下得出来的,其应用范围具有局限性。有鉴于此,关于风沙颗粒起动的机制研究仍有较多的创新空间。

关键词: 风沙运动, 起动条件, 受力平衡模型

Abstract: The mechanism of the wind initiation threshold of particles is in need of further study. The force balance model for the wind initiation threshold of particles is among the important issues in the wind initiation mechanism. This paper, based on published literatures, discussed the force balance conditions and reviewed typical force balance models for the wind initiation threshold of particles. It is thought that the factors influencing wind initiation of particles are complex and the significance of these factors are inadequately recognized. The existing force balance models provide important references for further study. However, they usually contain some approximations, assumptions and empirical coefficients to be determined in experiments, hence cannot be put into use directly. These models were derived at specific experimental conditions and have limitations in wider extension.

Key words: aeolian process, threshold conditions, force balance models

中图分类号:

X169

董治宝;罗万银. 风沙床面颗粒起动临界受力平衡模型的对比分析[J]. 中国沙漠, 2007, 27(3): 356-361.

DONG Zhi-bao;LUO Wan-yin. Comparable Analysis of Force Balance Model for the Wind Initiation Threshold of Particles on Sandy Bed[J]. JOURNAL OF DESERT RESEARCH, 2007, 27(3): 356-361.

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