EQ3093型自卸车举升机构的仿真与优化设计

发布时间：2018-06-06 05:49

本文选题：举升机构 + 仿真分析　；参考：《河北工程大学》2016年硕士论文

【摘要】：自卸车作为一种运输松散货物的机械,具有卸载效率高,劳动强度低等特点,几十年来在国内外获得迅速发展与普及。自卸车的举升机构是卸载过程中承受主要载荷的关键部件,对于设备的安全性和可靠性有着重要作用,直接影响着自卸车整车寿命,提高自卸车举升机构的性能和稳定性是一个亟待解决的问题。研究表明,自卸车举升机构的装卸载性能与稳定性受其铰接点的空间位置、材料,零部件质量等因素的影响。因此,研究自卸车举升机构,对提高装卸载性能与稳定性有着十分重要的意义。本文以EQ3093型号自卸车举升机构为研究对象,进行相关研究,研究的主要内容包括:1、针对EQ3093型自卸车前推式举升机构的结构特点和工作原理进行数学模型建立;2、根据自卸车举升机构的结构与位置参数,在Solidworks软件中建立举升机构三维模型,并对其进行虚拟装配和干涉检查;3、把无干涉要求的装配体模型以.X_T格式导入到RecurDyn软件中,对其进行运动学与动力学仿真分析,通过仿真分析,判断设计结果是否合理;4、运用ANSYS Workbench对举升机构三角臂进行有限元分析,得出四种不同工况下的应力应变分布图;根据分析结果完成对三角臂的拓扑优化,使之在满足刚度和强度的条件下,实现三角臂轻量化设计的目的;5、在对举升机构优化的基础上,考虑制造精度和安装误差等随机性误差对举升机构的影响,对其稳健性优化设计,得出符合实际情况的优化结果,满足举升机构的可靠性要求。本文通过多种软件完成对自卸车举升机构的仿真分析和三角臂拓扑优化设计,在满足强度和刚度的前提下,三角臂的质量由优化前的27.182kg缩减到17.78kg,质量减少到初始模型的65.411%,实现了轻量化设计的要求。最后加入制造精度和安装误差等随机性误差,完成自卸车举升机构的稳健性优化设计,使优化结果更趋合理可靠。
[Abstract]:As a kind of machinery for transporting loose goods, dump truck has the characteristics of high unloading efficiency and low labor intensity. It has been developed rapidly and popularized at home and abroad in recent decades. The lifting mechanism of the dump truck is the key component to bear the main load in the unloading process, which plays an important role in the safety and reliability of the equipment, and directly affects the life of the dump truck as a whole. It is an urgent problem to improve the performance and stability of the lifting mechanism of dump truck. The results show that the loading and unloading performance and stability of the lifting mechanism of the dump truck are affected by the space position of the hinge point, the material, the quality of the parts and so on. Therefore, it is very important to study the lifting mechanism of dump truck to improve the loading and unloading performance and stability. This paper takes the lifting mechanism of EQ3093 type dump truck as the research object, carries on the correlation research, The main contents of the study include: 1. According to the structural characteristics and working principle of the forward lifting mechanism of the EQ3093 type dump truck, the mathematical model is established. According to the structure and position parameters of the lifting mechanism of the dump truck, the three-dimensional model of the lifting mechanism is established in Solidworks software. Then virtual assembly and interference inspection are carried out, and the non-interference requirement assembly model is imported into RecurDyn software in the format of .XStat, and the kinematics and dynamics simulation analysis is carried out, and the simulation analysis is carried out. To judge whether the design result is reasonable or not, the finite element analysis of the triangular arm of the lifting mechanism is carried out by using ANSYS Workbench, and the stress-strain distribution diagram under four different working conditions is obtained, and the topology of the triangular arm is optimized according to the analysis results. Under the condition of satisfying the stiffness and strength, the aim of realizing the lightweight design of the triangular arm is 5. On the basis of the optimization of the lifting mechanism, the influence of the random errors such as manufacturing precision and installation error on the lifting mechanism is considered. For the robust optimization design, the optimization results are obtained, which meet the reliability requirements of the lifting mechanism. In this paper, the simulation analysis of the lifting mechanism of the dump truck and the topology optimization design of the triangular arm are completed by a variety of software. Under the premise of satisfying the strength and rigidity, The weight of the triangular arm is reduced from 27.182kg to 17.78 kg, and the mass is reduced to 65.411 of the initial model, which realizes the requirement of lightweight design. Finally, random errors such as manufacturing precision and installation error are added to complete the robust optimization design of the lifting mechanism of the dump truck, which makes the optimization result more reasonable and reliable.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.4

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