在材料力学中,为设计和校核中心受压杆件,我国以及苏联采用的都是折减系数法,美国采用的则是稳定安全系数法。两法形式不同,但都是安全可靠的。弄清两者的联系与差别,从中选出最经济而又简便者,是工程技术人员所期望的。本文通过将美国的稳定安全 In the mechanics of materials, in order to design and check the compression rods of the center, both China and the Soviet Union use the reduction factor method, and the United States uses the stable safety factor method. The two laws have different forms, but they are all safe and reliable. It is the expectation of engineers and technicians to clarify the connection and difference between the two, and to select the most economical and simple one from among them. This article passes the stability and security of the United States