考虑结构柔性后大型船舶靠泊时深水全直桩码头动力响应敏感性分析
Sensitivity analysis of dynamic response for deep-water all-vertical-piled wharves during large ships berthing considering structural flexibility
贺林林 1杜亦忠 2谢院仕 2梁越2
作者信息
- 1. 重庆交通大学 河海学院,重庆 400074;重庆交通大学 国家内河航道整治工程技术研究中心,重庆 400074
- 2. 重庆交通大学 河海学院,重庆 400074
- 折叠
摘要
深水全直桩码头的结构特点及动力响应与传统码头相比存在差异.为了研究船舶正常靠泊时全直桩码头结构的动力响应与结构特性,真实模拟船舶、橡胶护舷与码头结构之间的相互作用,首先基于Ansys/LS Dyna建立了大型船舶、橡胶护舷与码头结构整个系统相互作用的三维数值计算模型,并采用已有方法对计算模型进行了验证.然后,开展了深水全直桩码头结构在船舶正常靠泊时的动力响应特性研究,系统分析了不同桩径、不同护舷刚度、不同桩长影响下码头结构的加速度时程响应、位移时程响应及内能时程响应.研究发现:深水全直桩码头结构产生的弹性变形能够吸收相当一部分撞击能量,最多可达39%;桩径越大,结构横向刚度越大,局部振动越显著,吸收能量越少;橡胶护舷的刚度越大,能量传递速率越快,护舷吸收能量越少;桩长越长,结构横向刚度越小,整体振动越显著,结构吸收能量越多.
Abstract
The structural characteristics and dynamic responses of deep-water all-vertical-piled wharves differ from those of traditional wharves.To study the dynamic response of the all-vertical-piled wharf structure during normal ship berthing and understand its structural characteristics,accurate simulation of the interactions between ships,rubber fenders,and wharf structure is essential.Initially,a three-dimensional numerical model to simulate the interaction among the large ship,rubber fenders,and the wharf structure was established based on Ansys/LS Dyna and validated using existing methodologies.Subsequently,research on the dynamic response characteristics of deep-water all-vertical-piled wharf structures during normal ship berthing was conducted,analyzing the system's acceleration time-response,displacement time-response,and internal energy time-response under various pile diameters,fender stiffnesses,and pile lengths.The study found that the elastic deformation of the deep-water all-vertical-piled wharf structure could absorb a significant portion of the impact energy,up to 39%;larger pile diameters increased the structure's lateral stiffness,resulting in more pronounced local vibrations and less energy absorption;higher rubber fender stiffness led to faster energy transfer rates and more energy absorption by the fenders;and longer piles reduced the structure's lateral stiffness,leading to more significant overall vibrations and increased energy absorption by the structure.
关键词
深水全直桩码头/船舶撞击/橡胶护舷/船舶靠泊/撞击能量Key words
deep-water all-vertical-piled wharf/ship collision/rubber fenders/ship berthing/impact energy引用本文复制引用
出版年
2024
NETL
NSTL
万方数据