工程参数扰动性计算方法的选择与分析

Selection and Analysis on the Calculation Method for the Disturbance of Engineering Structural Parameters

工程结构中存在各类型的不确定因素,这些不确定因素对确定性参数结构的计算可能产生较大影响,本文基于振动基本理论、Kronecker代数、矩阵微分理论等方法,在综合概率摄动法、LR模糊数法、区间参数法三类计算扰动问题方法的基础上,分析各典型方法在计算水利工程结构传递力的计算特性,并以水电机组振动传导为算例,确定三类方法计算扰动范围的扩张性,结合各方法的特征,最终为水利工程计算参数扰动问题提供方法选择依据。

There are various types of uncertainties in engineering structures,which may have a great impact on the results of deterministic parameter structures.Based on vibration theory,Kronecker algebra and matrix differential theory,the computing property of typical methods in calculating the force transmissibility of hydraulic engineering structural are analyzed,including probability perturbation method,LR fuzzy number method and interval parameter method.Taking the vibration conduction of hydropower unit as example,the expansions of disturbance range of three methods are determined.Combined with the characteristics of each method,it provides method selection evidences for the perturbation problems of calculation parameters in hydraulic engineering.