基于碰撞数值模拟的桥梁等效静力船撞力——基本公式

建立3000-50003t载重吨位共5艘典型船舶的精细碰撞有限元分析模型，采用LS—DYNA碰撞分析软件计算得到相应的船撞力时间过程。给出最大峰值、局部平均和全局平均3种等效静力船撞力的定义，研究3种等效静力船撞力与船舶载重吨位和碰撞速度的关系。基于对碰撞计算结果的统计分析与参数拟合，提出桥梁等效静力船撞力计算的统计关系，并与美国AASnTO《桥梁船舶撞击设计指南》、《欧洲统一规范2．7分册》和我国《铁路桥涵设计基本规范》（TB10002．1—99）中给出的等效静力船撞力计算公式进行对比和讨论。

Equivalent Static Force of Ship Impact to Bridge Based on impact Numeric Simulation-Fundamental Formula

Precise impact definite element analysis model for 3 000 - 50 000 t dead weight ton at 5 typical ships in total is established, and LS-DYNA impact analysis software is used to calculate and obtain corresponding ship impact time course. Definitions for 3 equivalent static forces of ship impacts： Maximum peak value, local mean, and global mean are given to study relations between the 3 equivalent static forces of ship impacts and ship load weight ton and impact speed. Based on statistic analysis and parameters simulations on the result of impact calculation, statistic relations for calculating bridge equivalent static force of ship impact are put forward, and are compared and discussed with the calculation formula for equivalent static force of ship impact listed in American AASHTO ＂Guide on Bridge Ship Impact Design＂, ＂European Uniform Code 2.7 Volume＂, and domestic ＂Basic Criteria for Railroad Bridge and Culvert Design＂ （TB10002.1-99）.