吊绳式底拖网网高分析

The Analysis of the Height of the Mouth of the Norsellmg Bottom Trawl

利用拖网模型水槽试验资料，采用二因素方差分析的方法，对吊绳式底拖网网高进行了分析。分析结果认为吊绳高度变化和拖网速度变化对网口总高度都有影响，但拖网速度变化对网高的影响比吊绳高度变化对网高的影响要大。

The using of the bottom trawl has been reported,and has taken some effects. But,how can the changing of the norselling affect the height of the mouth of the trawl? In this paper,through the model-experiment,adopt-ing the analysis of variance of two facts,the writer has analysed the height of the mouth of the norselling bottom trawl.The result:both the changing of the length of the norselling and the changing of the towing speed affect the total height of the mouth of trawl,but the second one is much obvious than the first。