Authors

Abstract

To determine the parameters of the whole corn stalks shearing mechanics, single factor and multi factor tests were carried out by using node and internode critical shearing strength as the evaluation indexes and the moisture content, sampling location and shearing speed as the influencing factors. The results showed that the moisture content, sampling location and shearing speed had significant effects on the critical shearing strength of internodes and nodes (F > F0.05), the order of the influencing factors on the internode and node critical shearing strength were moisture content >sampling location >shearing speed and sampling location >moisture content >shearing speed. By using Design-Expert and Desirability Function Approach, the optimization problem of three response values, including difference value of critical shearing strength between node and internode at the same segment (DV), the node and internode critical shearing strength, was transformed into a single response value optimization. The corn stalks with a moisture content of 15% had lower shearing strength and higher shearing stability at the shearing speed of 25 mm/min.

Abstract in Chinese

为确定玉米秸杆的整杆剪切工艺参数,本文以含水率、取样部位、剪切速度为试验因素，节间和节部临界剪切强度为试验指标进行单因素和多因素试验。试验结果表明：含水率、取样部位、剪切速度对节间和节部临界剪切强度均影响显著，节间临界剪切强度影响的因素主次顺序为含水率>取样部位>剪切速度，节部临界剪切强度影响因素主次顺序为取样部位>含水率>剪切速度。利用满意度函数法和Design-Expert数据分析软件，将节间、节部临界剪切强度及节部节间临剪切强度差值三个响应值优化转化成单一响应值优化。优化结果表明，使用25mm/min的速度剪切含水率为15%的玉米秸秆，玉米秸秆的整杆剪切强度低，剪切平稳性高。