随着科学技术的日益进步,各种各样的机械更加趋于现代化,结构亦越来越复杂,同时,对它们的可靠性要求越来越高。以往对起重机的可靠性问题只有定性的研究,没有定量的数值分析。现在,可靠性作为一门新兴学科,为起重机的可靠性研究和计算提供了新的手段。本文将以由上海市建科所设计、上海市宝山建筑机械厂生产的SJT型 With the advancement of science and technology, various types of machinery have become more modern and their structures have become increasingly complex. At the same time, their reliability has become increasingly demanding. In the past, there was only qualitative research on the reliability of cranes and there was no quantitative numerical analysis. Nowadays, reliability, as a new discipline, has provided new means for crane reliability research and calculation. This article will use the SJT model designed by Shanghai Jianke Institute and produced by Shanghai Baoshan Construction Machinery Factory.