开车途中,你在使用蓝牙耳机吗?

交警提醒:应对新交规改用蓝牙耳机存在交通隐患近日,笔者在329国道鄞州段东外环路口、215省道南外环路口等处调查发现,开车用手机拨打电话原先较为普遍的现象现在已难觅踪迹,取而代之的是,一部分驾车人员耳朵上多了一部蓝牙耳机。     

Q378型抛丸机除尘系统

简要介绍了Q378型抛丸机除尘系统的设计和效果。经治理后作业带空气中粉尘浓度和排放尾气中含尘浓度均达到了工业卫生标准和排放标准要求。     

The Stability Study of Globe Transportation Center of Beijing Capital International Airport

Introduction For decades, the long-span space structurehave been widely used in the world. The light steearch structural system also becomes popular, because of its beautiful shape, reasonable structurand low cost[1]. With the application of higstrength structural steel and advanced constructiotechniques, however, the flange plates and web oa steel arch system have become thinner and thinner than before, which makes the structural stability more serious, especially for the long-span thiwall va…     

Wind Vibration Study of Long-span Steel Arch Structure of Beijing Capital International Airport

IntroductionThe long-span light-weight steel arch struc-tures have been widely used in the world due to itsbeautiful shape and reasonable mechanical charac-teristics. With the development of the computa-tional theory, the steel arch span becomes longerand longer. So, the wind loads become the majoror even dominant loads applied on steel arch struc-tural system[1~3]. The distress and damage willprobably occur in the structure, because of thelong term wind-induced vibration.1 Structural Wind-in…     

绍兴曹娥江袍江大桥桥墩防撞分析与设计

介绍了绍兴曹娥江袍江大桥的工程特点,利用经验公式与有限元方法对船与桥墩碰撞过程进行了模拟仿真,说明设计桥墩防撞装置的必要性.提出设计摩擦桩式防撞装置以保护桥墩,并对该装置的结构、防撞效果、防撞方式进行了分析.     

绍兴曹娥江袍江大桥船撞桥墩撞击力分析

绍兴曹娥江袍江大桥主桥为(40+185+185+185+40)m带边拱的3跨中承式系杆拱桥,为了解大桥在发生船桥相撞时的状况,对大桥船撞桥墩撞击力进行计算.采用2个国内规范的计算公式、3个国际桥梁和结构工程协会(IABSE)指南中的公式进行计算,同时建立有限元模型进行仿真计算.经过对比分析,IABSE指南中的索尔-诺特...     

曹娥江袍江大桥施工全过程仿真分析

以曹娥江袍江大桥为工程背景,采用MIDAS软件,对该桥进行了施工全过程仿真分析,并与实测结果进行了比较,得出,实际工程中的钢管混凝土拱桥结构应考虑初应力的影响的结论.