Correlation failure analysis of an uncertain hysteretic vibration system     

张旭方  张义民  郝秋菊 《地震工程与工程振动(英文版)》2008,7(1):57-65

In this paper, a numerical method for correlation sensitivity analysis of a nonlinear random vibration system is presented. Based on the first passage failure model, the probability perturbation method is employed to determine the statistical characteristics of failure modes and the correlation between them. The sensitivity of correlation between failure modes with respect to random parameters characterizing the uncertainty of the hysteretic loop is discussed. In a numerical example, a two-DOF shear structure with uncertain hysteretic restoring force is considered. The statistical characteristics of response, failure modes and the sensitivity of random hysteretic loop parameters are provided, and also compared with a Monte Carlo simulation.  相似文献   

西部地区民航运输与旅游业发展的互动关系     

张伟  殷瑞阳  战莹  张旭方 《地理科学》2023,(10):1774-1782

基于2005—2019年中国西部12个省级行政区旅游收入和民航客运量面板数据以及2020年旅游景区与机场位置空间截面数据,借助核密度、机场可达性分析和PVAR动态模型,对西部地区民航运输与旅游业发展之间的时空关系进行探究。研究结果显示：(1)西部地区机场布局与旅游资源分布整体协调度较高,但各省级行政区之间的空间协调程度存在一定差异,具体可将省级行政区划分为优质协调发展区、良好协调发展区和初级协调发展区3种类型;(2)西部地区呈现民航运输对旅游业单向影响更强烈的局面,二者并未形成长效互动机制;(3)从控制变量贡献看,财政支出对民航运输业的推动作用更强,旅游业的发展则更依赖于地区经济发展水平和区域陆路交通网络密度,城镇化规模对二者发展都具有一定的支持作用。  相似文献