一、随机减量分析随机减量技术最初由Cole H.A.先生提出,目的在于测量和检测当机翼受到气流的扰动激励时的阻尼和结构损伤(1,2)。随机减量技术是一种从随机数据中提取有意义的信息的快速会集方法。在这个过程中,安装在一个受到随机激励装置上的传感器的随机振动响应段被集合平均,形成一个样本,它代表结构自由振动衰减曲线。该样本可用来测量阻尼或检测早期故障。这种方法对于在野外测量结构和机械系统将特别有用。因为随机输入激励来自大自然,例如噪声、液流和风等。这一节我们简要地但又比较直观地解释随机减 I. Random Degradation Analysis Random reduction techniques were first proposed by Mr. Cole H. A. for the purpose of measuring and detecting dampening and structural damage when wings are excited by disturbances of the air flow (1,2). Random reduction technology is a fast method of gathering meaningful information from random data. During this process, the random vibration response sections of the sensors mounted on a random excitation device are collected averaging to form a sample that represents the free vibration damping curve of the structure. The sample can be used to measure damping or detect early faults. This method will be particularly useful for measuring structures and mechanical systems in the field. Because random input incentives come from nature, such as noise, fluid and wind. In this section, we briefly and intuitively explain the random subtraction