基于ANSYS的桥式抓斗卸船机结构抗震性能分析

Seismic behavior analysis of bridge-type grab ship unloader based on ANSYS

针对桥式抓斗卸船机在地震作用下的动态响应和抗震性能问题,对卸船机结构在地震作用下的结构强度、应变特性、轮压稳定性以及损伤模式等方面进行了研究,提出了基于ANSYS的结构抗震分析方法。结合传统岸桥和建筑抗震分析理论,利用ANSYS建立了桥式抓斗卸船机钢结构有限元模型,对卸船机在不同工况和不同地震激励下的位移响应、应力响应和轮压进行了地震等效静载分析计算,明确了卸船机的关键位置。在等效静载分析的基础上,根据拟建场地的基础特性和卸船机的结构振动特性,选取了合适的抗震设计反应谱和典型地震波记录,对卸船机主要工况在不同地震激励下进行了反应谱分析和动力时程分析,并将其与等效静载分析的实验数据进行了对比研究。实验结果表明:桥式抓斗卸船机有较好的抗震性能,满足规定的抗震设防烈度7度,保证了其钢结构设计的正确性,对卸船机的抗震研究领域和工程应用具有参考意义。

Aiming at dynamic response and seismic performance of bridge type grab ship unloader under earthquake,the method for seismic analysis of structure based on ANSYS was put forward with the research on intensity,strain characteristics,wheel pressure stability and damage mode of ship unloader structure under earthquake. According to the traditional theoretical anti-seismic analysis of quayside container crane and architecture,a finite element model of the bridge-type grab ship unloader based on ANSYS was established for stability of major damage pattern and wheel pressure with equivalent static analysis in different conditions and seismic excitations. Aiming at dynamic behavior and seismic response of the ship unloader under longitudinal or transverse seismic action,according to the court sorts division and the vibration characteristic of structure,the anti-quaking design reacting spectrum of crane and the typical seismic record was used for time history analysis of ship unloader. The experimental data between the equivalent static analysis,response spectrum analysis and time history analysis was compared. The research result indicates that the ship unloader can satisfy the requirement of seismic fortification intensity and ensure the correctness of the design of steel structure. It has certain reference significance to the seismic research field and project application of bridgetype grab ship unloader.