排序方式: 共有103条查询结果,搜索用时 140 毫秒
21.
22.
23.
轿车碰撞安全性的评价及车身碰撞安全性设计 总被引:3,自引:1,他引:3
汽车的安全越来越受到重视,各国各地区都加强了对安全法规的制定工作,尤其是碰撞安全性更是得到关注。目前,在美国、日本、欧洲及澳洲都有称为NCAP的组织机构,对不同车型进行汽车碰撞安全性评估。汽车碰撞安全性评估主要包括正面碰撞、侧面碰撞、儿童保护和行人保护4个方面。防正面碰撞的车身结构设计已经成熟,由刚性的乘员舱与前后的吸能区组成,并注意吸能后撞击力的分流;防侧面碰撞的车身结构设计也正趋完善,重点是放在加强车身刚性和冲击力分流2个方面;为满足保护行人法规要求,整车的造型和汽车前部结构发生了很大的变化。 相似文献
24.
25.
文章根据曹娥江袍江大桥工程地质条件和结构特点,从经济和技术角度对软土地基支架现浇可采用的不同支架方案进行了比选,提出了在淤泥、软土地基上进行大体积混凝土边跨拱支架现浇施工的设计方案,并结合该工程实例,介绍了混凝土现浇防裂控制、大体积混凝土内部温度控制措施及混凝土现浇施工技术。 相似文献
26.
Tso-Liang Teng Kuan-Chun Chang Chien-Hsun Wu 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2007,45(10):925-937
Side-impact collisions are the second leading cause of death and injury in the traffic accidents after frontal crashes. Side-impact airbags, side door bars and other protection techniques have been developed to provide occupant protection. To confirm the effectiveness of protection equipment installed in vehicles, studying the degree of impact is fundamental to understand the effect of automobile collisions on the human body. Therefore, the dynamic response of the human body to traffic accidents should be analyzed to reduce the level of occupant injuries. Generally, the experimental method is complex and expensive. Recently, numerical crash simulations have provided a valuable tool for automotive engineers. This work presents full-scale and sled side-impact test finite-element (FE) models - based on the Federal Motor Vehicle Safety Standard No. 214 - that simulate a side-impact accident. The crash simulations utilized the LS-DYNA finite-element code. The human body's dynamic response to crashes is discussed herein. Additionally, occupant injuries were measured. To verify the accuracy of the proposed crash test and sled test FE models, simulation results are compared with those obtained from experimental tests. The comparison results indicate that the proposed crash test and sled test FE models have considerable potential for assessing a vehicle's crash safety performance and assisting future development of safety technologies. 相似文献
27.
28.
文章对膨胀土的物理力学进行了分析,解释了路基病害形成的机理,提出了相应处理措施,最后引用小河-安康高速公路膨胀土处理的实例验证了处理措施的合理性. 相似文献
29.
公路路堑高边坡防护预应力锚索施工技术 总被引:2,自引:0,他引:2
文章结合二广高速公路怀集段N0.33标段的高边坡防护施工实践,介绍复杂地质条件下的预应力锚索试验及施工工艺,对施工中如何最大限度地发挥岩土能量,确保施工安全和边坡稳定,提出可行的措施。 相似文献
30.