基于ANSYS/LS-DYNA模块的船-闸撞击力分析

Analysis of ship-gate impact force based on ANSYS/LS-DYNA modular

进行闸门设计或增加防撞设施时,船舶撞击力的取值非常重要。以谏壁三角船闸为例,运用ANSYS有限元计算软件分析得出5种撞击速度、5种船舶排水量共25种工况的撞击力时程曲线,与国内常用规范进行对比分析。结果表明:撞击时间随着撞击速度的增加而缩短,随着船舶吨位的增加而增大;《船闸水工建筑物设计规范》《船闸闸阀门设计规范》采用的船舶撞击力没有综合考虑船舶吨位和撞击速度两者的影响,取值偏低;《水利水电工程钢闸门设计规范》的船舶撞击力取值约为有限元分析的撞击力平均值的0.7倍。

The value of ship impact force is very important when designing lock gates or adding anti-collision facilities. Taking Jianbi triangular lock as an example, we use ANSYS finite element calculation software to analyze the time-history curves of the impact force of 25 working conditions under 5 kinds of impact velocity and 5 kinds of ship displacement, and compare the results with the common domestic codes. The results show that the impact time decreases with the increase of impact velocity and increases with the increase of ship tonnage. The impact forces adopted in Code for Design of Hydraulic Structures of Shiplocks and Code for Design of Lock Gates and Valves of Shiplocks do not comprehensively consider the influence of ship tonnage and impact velocity, and the values are too low. The value of ship impact force in Design Specification for Steel Gates of Water and Hydropower Projects is about 0.7 times as the average value of the impact force in finite element analysis.