复杂船舶围壁的传热多项式传递函数辨识  

Identification of the s-polynomial transfer function of heat transfer for complex ship casing walls

作　　者：李伟光[1] 杨海燕[1] 李丽[2] 李安邦[2] 徐新华[2] 

机构地区：[1]中国舰船研究设计中心,湖北武汉430064 [2]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《中国舰船研究》2015年第3期108-112,共5页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(51178201)

摘　　要：目前关于复杂船舶围壁的动态传热研究较少,且缺乏较为完善的动态传热计算方法。复杂船舶围壁结构因不规则,其传热传递函数很难通过理论推导得出。构造复杂船舶围壁的多项式传热传递函数,以该围壁的频域有限差分(FDFD)模型计算的频域热特性为参考,采用参数辨识算法辨识多项式传递函数的系数。多项式传递函数的频域热特性与FDFD模型计算得到的理论频域热特性能很好地吻合,结果表明通过辨识得到的多项式传递函数可以很好地反映船舶围壁的动态热特性,可以用于船舶复杂围壁的动态传热计算。Presently,the study on the dynamic heat transfer of complex ship casing walls and on the efficient dynamic heat transfer calculation methods is quite limited,as it is difficult to analytically obtain the transfer function of heat transfer of complex ship casing walls due to its irregular geometrical structures.This paper presents the s-polynomial transfer function to solve the above mentioned problems. A Frequency-Domain Finite-Difference（FDFD）model of a ship casing wall is first developed to calculate its theoretical frequency characteristics as the reference,and the parameters of the s-polynomial transfer function are then identified by using the parameter identification algorithm in the frequency domain. It is seen that the frequency thermal characteristics of the identified s-polynomial transfer function agree well with theoretical frequency thermal characteristics of the FDFD model. The results show that the proposed s-polynomial transfer function can well present the dynamic thermal characteristics of the complex ship casing wall,and,therefore,can be used for dynamic heat transfer calculation for such structures.

关 键 词：船舶围壁 频域有限差分(FDFD) 参数辨识 传递函数 频域热特性 

分 类 号：U664.86[交通运输工程—船舶及航道工程]