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在自然界和人们的工程实践中,存在着广泛的物理现象的相似。由于物理现象都受一定自然规律的约束,所以能否正确选择现象的物理量,就成为相似性研究成败的关键。 对于一些复杂现象而言,要正确选择它的参数常常不是一件容易的事。这方面的典型实例,是土壤-机器系统。举几与土壤发生关系的机械,诸如拖拉机、农机、工程机械、坦克和一些常见的越野车辆等等,都可列作这一系统研究的对象。 本文介绍了土壤-机器系统参数选择的历史过程及其现状,并从基本的物理概念出发,提出了如何合理选择这一系统参数并加以恰当搭配的意见,可供有关人士在研究这一系统相似性问题肘的参考。
In nature and people’s engineering practice, there is a wide range of similar physical phenomena. Since the physical phenomena are bound by certain natural laws, the key to the success or failure of the resemblance research is to correctly select the physical quantities of the phenomena. For some complex phenomena, it is often not easy to choose its parameters correctly. A typical example of this is the soil-machine system. For example, tractors, agricultural machinery, construction machinery, tanks and some common off-road vehicles can be cited as the object of this systematic study. This paper introduces the historical process of soil-plant system parameter selection and its status quo. Based on the basic concept of the physical system, we put forward some suggestions on how to select and coordinate the system parameters reasonably. Reference for sexual problems elbow.