摘要
采用了一种新的双因子分析法研究了模糊参数桁架结构在模糊随机荷载激励下的动力响应问题.同时考虑结构参数模糊性和外载荷幅值的模糊随机性,利用模糊因子法和振型迭加法求出了动力响应模糊随机变量;进而基于随机因子法推导了动力响应的模糊数字特征.最后通过算例考察了结构参数和荷载的不确定性对动力响应的影响.
Considering the fuzziness of structural parameters and the fuzzy-randomness of load, fuzzy-randomness of structural dynamic responses and fuzzy numerical characteristics of dynamic response are studied. From Duhamel integral, the fuzzy-stochastic dynamic response is derived by using fuzzy factor method combined with mode superposition method. The fuzzy numerical characteristics of dynamic response are developed with the random factor method. The rationality and validity of the modeling and the proposed approach are examined through an illustative example.
出处
《固体力学学报》
EI
CAS
CSCD
北大核心
2007年第3期271-274,共4页
Chinese Journal of Solid Mechanics
基金
陕西省自然科学基金(2005A009)资助.
关键词
模糊桁架结构
模糊随机荷载
动力响应
模糊数字特征
fuzzy truss system, fuzzy-random load, dynamic response, fuzzy numericd characteristics
