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轨道集装箱龙门起重机结构系统的运动数值仿真及动力学分析

发布时间:2018-11-17 09:09
【摘要】:起重运输在整个国民经济中有着十分重要的地位,随着生产规模的扩大、自动化程度的提高,提高起重机械的生产效率、确保运行的安全可靠性、降低物料搬运成本势在必行。 本文运用有限元软件ANSYS的APDL语言建立了轨道集装箱龙门起重机系统结构的参数化有限元模型,并在四种不同工况下,对集装箱龙门起重机结构系统进行了静力学分析,获得不同工况下的应力图和位移图。得出龙门起重机的强度和静刚度均满足起重机设计规范要求,并且安全系数较大,因此有必要对龙门起重机的结构进行优化,以减轻自重、节约材料。 对集装箱龙门起重机系统结构做了模态分析,得出前10阶固有频率和振型。通过谐响应分析得出对集装箱龙门起重机的动态响应影响最大、易引起共振的固有频率和振型。 对集装箱龙门起重机系统结构建立了瞬态分析弹性动力学模型,确定了Alpha和Beta的数值,并运用ANSYS软件对集装箱龙门起重机在起吊瞬间三个阶段的分析,得出集装箱龙门起重机在起振之后并不是一直做等幅振动,由于阻尼的存在,振幅不断衰减,系统由暂态响应变为稳态响应。 根据结构优化设计和机械结构动态设计理论和方法,对集装箱龙门起重机结构系统进行了以重量为目标函数的优化,经过优化后,系统减少质量14.9% ,节约了成本,提高了经济效益。
[Abstract]:Lifting transportation plays an important role in the whole national economy. With the expansion of production scale and the improvement of automation, it is imperative to improve the production efficiency of lifting machinery, ensure the safety and reliability of operation, and reduce the cost of material handling. In this paper, the parameterized finite element model of rail container gantry crane system structure is established by using APDL language of finite element software ANSYS, and static analysis of container gantry crane structure system is carried out under four different working conditions. The stress and displacement diagrams are obtained under different working conditions. It is concluded that the strength and static stiffness of the gantry crane meet the requirements of the crane design code and the safety factor is high, so it is necessary to optimize the structure of the gantry crane in order to reduce the weight of the gantry crane and save the material. The modal analysis of container gantry crane system is carried out, and the first 10 natural frequencies and modes are obtained. Through harmonic response analysis, it is found that the dynamic response of container gantry crane is most affected, and the natural frequency and mode of resonance are easy to be caused. The transient analysis elastic dynamic model of container gantry crane system structure is established, the numerical value of Alpha and Beta is determined, and the three stages of container gantry crane in lifting moment are analyzed by ANSYS software. It is concluded that the container gantry crane does not always do the same amplitude vibration after starting the vibration. Because of the existence of damping, the amplitude of the crane decreases continuously, and the system changes from transient response to steady state response. According to the theory and method of structural optimization design and dynamic design of mechanical structure, the structure system of container gantry crane is optimized with weight as the objective function. After optimization, the quality of the system is reduced by 14.9%, and the cost is saved. The economic efficiency has been improved.
【学位授予单位】:兰州理工大学
【学位级别】:硕士
【学位授予年份】:2011
【分类号】:TH213.5

【引证文献】

中国硕士学位论文全文数据库 前2条

1 杨利业;引线键合自动送线系统关键技术研究[D];天津大学;2012年

2 柴源;真空辊技术在铝板带纵剪机组中的应用与研究[D];沈阳理工大学;2012年



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