【摘要】 分析比较了我国《铁路桥涵设计规范》、美国AASHTO《公路桥梁设计规范》和《欧洲统一规范2.7分册》中船撞力计算公式。利用有限元软件Ls-DYNA创建不同重量、不同类型的船舶有限元模型,模拟船舶与刚性墙的正面碰撞过程,将数值模拟得到最大船撞力与各规范计算结果比较,研究表明数值模拟得到最大船撞力与美国规范和欧洲规范的计算结果相近;最大船撞力和船舶重量的开方基本呈成正比关系;相同重量而类型不同的船舶由于船艏形状不同,所得的船撞力时程曲线不同,对应最大船撞力也不相同。更多还原

【Abstract】 It briefly introduces the design formula of ship collision in China’s "Basic Criteria for Railroad Bridge and Culvert Design",American AASHTO "Guide on Bridge Ship Impact Design" and "European Uniform Code 2.7 Volume".Precise impact finite element models for different weight and different shapes are established using Ls-DYNA impact analysis software,respectively.Process of collision between ship and rigid wall was simulated.Following conclusions are obtained during the maximum ship collision force and the calculated results in design codes: results in American AASHTO "Guide on Bridge Ship Impact Design" and "European Uniform Code 2.7 Volume " are the largest;the result of China’s "Basic Criteria for Railroad Bridge and Culvert Design" is the smallest;the finite element simulation result between them.Maximum ship collision force is proportional to the square root of the tonnage of ship.As the ship bow of different shapes,the same weight but different types of ships have different type of ship collision force-time curve and vary in maximum impacted force.更多还原