一、引言工程机械的可靠性和寿命,在过去相当长的一段时间里,大多通过现场实际作业进行考核,不但浪费了大量的人力,物力,并使产品的研制和定型周期很长。近十几年以来,由于电子计算机,电子—液压伺服技术,随机函数理论和统计仪器的发展,在可靠性和寿命试验方面国外已广泛采用一种新的试验方法—室内模拟试验,这种方法是通过在实际作业的条件下,测取适当数量的数据,并把这些数据整理 I. INTRODUCTION The reliability and longevity of construction machinery have been assessed in the past for a long period of time, mostly through on-site actual operations. This not only wastes a lot of manpower and material resources, but also results in long product development and finalization cycles. Over the past decade or so, due to the development of electronic computers, electro-hydraulic servo technology, random function theory, and statistical instruments, a new test method—indoor simulation test—has been widely used abroad for reliability and life test. By measuring the appropriate amount of data under actual operating conditions and organizing these data