基于未确知测度理论的桥式起重机安全评估

On the crane safety assessment based on the unacertained measuring theory

针对未确知测度模型简单、实用和可靠的特点,采用未确知理论建立了起重机安全状况评价模型来评价桥式起重机安全状况。运用未确知测度模型,将评价指标属性看做是未确知的,通过置信度λ确定桥式起重机的安全状况。实例研究表明,运用末确知测度模型进行起重机安全评价,理论上是合理的,计算结果是可信的。本方法既考虑了空间的有序性,也考虑了信息的不确定性,使评价结果更趋向合理、精细。

The paper is engaged in a study of the crane safety assessment method based on the unascertained measuring theory. With the rapid economic development of modern society, more and more widely use of various cranes are found in the construction and transportation areas, particularly, in the construction area. With the increase of the national infrastructure investment, much greater varieties of crane demands have been brought about to the crane manufacturers. However, higher and higher standards have been established to the safety operations of crane installations and workers＇ operation skills so as to protect people and material properties from any kind of unexpected accidents in addition to the social stability. It is just from this increasing safety need that we have worked out a safety evaluation model by using the unascertained mathematical theory, which is featured as being simple, practical and reliable. The safety evaluation model we proposed for the overhead crane can be divided into four stages, by using the assessment indexes as unascertained information and the confidence level. Taking 5 bridge cranes as examples, by identifying a single indicator matrix and unascertained measure weights, we have formulated a multi-attribute integrated measurement matrix system with the sample being identified and sorted out. The results of our assessment practice prove to be in nice conformity with the results of the software analysis results. The model initiated by us can not only help to evaluate a single crane security, but also the cranes with roughly equal security situations. Case studies also show that the use of unascertained measure model is reasonable in theory and credible in results. It not only includes ordering of information uncertainty but also the evaluation of the space, so that the evaluation result can be made rational, sophisticated and practical.