分隔贮箱内液体晃动参数的识别方法

分隔贮箱内液体晃动问题可以用一个两自由度非线性阻尼系统予以描述。本文采用等效线性化方法处理非线性阻尼参数，给出了一种利用稳态正弦基础激励晃动试验技术确定分隔贮箱内液体晃动等效力学模型的参数识别方法。方法通过引入晃动模态的频响函数剩余影响的拟合项实现两阶晃动模态的分离识别。数值仿真计算表明，这一方法给出的参数识别结果可以满足工程应用的精度要求

IDENTIFICATION METHOD OF LIQUID SLOSHING PARAMETERS IN COMPARTMENT TANKS

The dynamic properties of liquid sloshing in compartment tanks are able to be desribed by a two degree of freedom system with nonlinear damping Using the method of equivalent linearization to replace the nonlinear damping parameters,a parameter identification method for determining the equivalent mechanical models of liquid sloshing in compartment tanks by the sloshing test technique with dweel sine base excitation is given Through introducing the residual terms which fit the residual effects of frequency response functions of sloshing modes,this method realizes the separating identification of two sloshing modes The calculations of numerical simulation show that the results of parameter identification obtained by this method can satisfy the precision requirement of engineering applications