一、问题的提出 目前,虽然天轮已定型了,可是对天轮内部的受力情况,还没有一个较准确而又简单的计算公式,用来校核当钢绳断裂时,天轮的材料强度是否已达到屈服限。某些书刊中虽介绍有简单计算公式,但其计算结果不够准确,或者有的材料虽有较准确的计算方法却无简单的 First, the issue raised At present, although the Celestial wheel has been stereotyped, but the force inside the Celestial wheel, there is no more accurate and simple calculation formula used to check when the steel rope rupture, Celestial wheel material Whether the strength has reached the yield limit. Although some books have introduced a simple calculation formula, but its calculation is not accurate enough, or some materials, although a more accurate calculation method is not simple