考虑激励随机过程性的桥面行车安全可靠度分析

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (7) : 112-117.

论文

考虑激励随机过程性的桥面行车安全可靠度分析

马麟1;韩万水2;刘健新2;李加武2

作者信息 +

Reliability Analysis of driving Safety on Long-span Bridge Considering Statistic Progress Characteristics of Excitation

MA Lin 1;HAN Wan-shui2;Liu Jian-xin2;LI Jia-wu2

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摘要

探讨脉动风和路面粗糙度的随机过程性对行车安全可靠度的影响，研究同时考虑平均风的随机性和脉动风的随机过程性的行车安全概率评价方法。采用经典动力可靠度理论分析随机过程性的影响。研究结果表明：侧风环境下桥面行驶汽车的支撑力响应是弱非平稳过程，可以采用经典动力可靠度理论研究行车安全可靠度。车速高时，随机过程性的影响较大；以桑塔纳为代表的小汽车受随机过程性的影响程度比箱式货车的大；随机过程性的影响程度还与动力可靠度曲线和平均风速概率密度函数的风速范围有关。

Abstract

The effects of the statistic progress characteristics of turbulent wind and road roughness on the driving safety reliability are discussed, and the evaluation method for safety probability of vehicles driving on the bridge deck is studied, which will consider the randomness of mean wind velocity as well as the statistic progress characteristics of turbulent wind. The effects of the statistic progress characteristics are analyzed by classical dynamic reliability theory. The results show that contacting forces of vehicle tires are weak non-stationary progress within lateral wind environment, so classical dynamic reliability theory is applicable to safety reliability analysis of driving vehicles. The driving speed is higher, the effect of statistic progress characteristics is more obvious. And driving reliability of Santana that represents small cars is influenced more considerably by the statistic progress characteristics than that of box-type truck. The extent of the effect is relevant to wind velocity range of dynamic reliability curve and that of probability density function for mean wind velocity.

导出引用

马麟;韩万水;刘健新;李加武. 考虑激励随机过程性的桥面行车安全可靠度分析[J]. 振动与冲击, 2012, 31(7): 112-117

MA Lin;HAN Wan-shui;Liu Jian-xin;LI Jia-wu. Reliability Analysis of driving Safety on Long-span Bridge Considering Statistic Progress Characteristics of Excitation [J]. Journal of Vibration and Shock, 2012, 31(7): 112-117