37米混凝土泵车臂架静强度与动态特性分析

发布时间：2018-06-11 09:36

本文选题：混凝土泵车 + 臂架　；参考：《华中科技大学》2015年硕士论文

【摘要】：近年来我国经济持续高速发展,对基础设施建设的投入比重不断加大,建筑行业呈现出蓬勃发展的趋势,这对混凝土相关行业起到了巨大的推动作用,混凝土泵车凭借其诸多优点成为建筑施工中非常重要的设备。作为泵车重要构件的臂架,其结构性能对整车寿命和稳定性有决定性影响,因此对臂架进行研究可以对臂架结构的优化以及性能的改进有重要意义。本课题为国家863计划项目“用于重型机械安全监控的无线微纳传感器与系统”的子课题,主要以仿真计算的方式对泵车臂架做研究。根据相关资料,对泵车的发展历程、国内外现状以及现存问题做了比较全面的概述,指出了臂架未来发展的趋势。本文选择了某公司的37米泵车臂架为研究模型,提出了联合仿真分析的具体方案。首先,创建了臂架构件三维几何模型,分析了臂架的多种工况,确定把臂架装配成水平工况进行分析,采用MPC多点约束方程的形式模拟销轴连接,最终创建了有限元模型;其次,对模型进行静强度计算以及模态分析,对其应力结果和频率振型图分别进行分析,并指出模型的薄弱位置以及优化方案;随后,利用ADAMS对臂架做动态特性研分析,研究了各个臂架运动速度及加速度的运动规律,本文加入臂架的弹性形变的影响,生成臂架MNF文件,替换现有的臂架模型,创建臂架刚柔耦合模型,分析其铰点受力变化规律。最后,通过对两种模型的受力结果的比较和评价,验证了臂架的弹性形变引起的振动是不可忽略的,提出了结构优化的方案,对以后的研究有很大的参考意义。
[Abstract]:In recent years, China's economy has continued to develop at a high speed, the proportion of investment in infrastructure construction has been increasing, and the construction industry has shown a trend of vigorous development, which has played a huge role in promoting concrete related industries. Concrete pump car has become a very important equipment in construction by virtue of its many advantages. As an important component of pump vehicle, the structural performance of the boom has a decisive effect on the life and stability of the whole vehicle. Therefore, the study of the boom can be of great significance to the optimization of the boom structure and the improvement of its performance. This subject is a subproject of the national 863 project, "Wireless micro-nano sensor and system for heavy machinery safety monitoring", which mainly studies the boom of pump truck by simulation. According to the relevant data, the development course, the present situation and the existing problems of pump vehicle are summarized comprehensively, and the future development trend of boom is pointed out. In this paper, the 37 meter pump boom of a company is selected as the research model, and the concrete scheme of joint simulation analysis is put forward. Firstly, the 3D geometric model of the arm member is established, the various working conditions of the boom are analyzed, and the arm is assembled into horizontal working condition to analyze. Finally, the finite element model is created by using the MPC multi-point constraint equation to simulate the pin shaft connection. Secondly, the static strength calculation and modal analysis of the model are carried out, the stress results and the frequency mode diagram are analyzed respectively, and the weak position of the model and the optimization scheme are pointed out. Subsequently, the dynamic characteristics of the boom are analyzed by Adams. In this paper, the effect of elastic deformation of the boom is studied. The MNF file is generated, the existing arm model is replaced, the rigid-flexible coupling model of the boom is established, and the law of stress change at the hinge point is analyzed. Finally, through the comparison and evaluation of the stress results of the two models, it is proved that the vibration caused by elastic deformation of the boom is not negligible, and the scheme of structural optimization is put forward, which is of great reference significance for future research.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU646

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