基于地面力学的强夯机柔性多体动力学仿真

发布时间：2018-04-13 13:01

本文选题：强夯机 + 履带地面　；参考：《大连理工大学》2012年硕士论文

【摘要】：在地基加固方法中强夯法具有施工方便、经济易行、工艺简单等诸多优点,在世界范围内得到广泛使用,但是作为强夯专用设备的强夯机的设计与制造尚无国家标准。目前国内很多强夯设备是通过在履带式起重机的基础上增加辅助装置改进而成,专用强夯机的设计也主要是参考起重机的设计方法和标准,但是强夯机与普通起重机相比具有极高满载率、突然卸载和频繁作业等工作特点。因此在对强夯机关键结构的强度、刚度分析的基础上进行整机的动态性研究是十分必要的。本文以大连理工大学工程机械研究所开发的400t·m强夯机为研究对象,以动力学仿真软件ADAMS为平台,结合有限元分析软件ANSYS建立了该强夯机柔性多体动力学模型。在考虑到强夯机作业场地影响的基础上引入地面力学,并利用C语言在ADAMS/View中通过用户子程序开发了履带-地面力学模型。在不同的地面类型、不同幅度和有无防后倾液压缸作用的基础上进行了仿真研究。通过结果分析发现：人字架后拉杆设计存在不足；防后倾支腿的液压回路压力峰值过大。在9.7幅度,20t吊锤时的强夯作业进行了实测,仿真结果与物理样机实测结果吻合较好,误差为13.4%。本文通过对强夯机的仿真研究,其结果可以作为强夯机设计和改进的参考。对基于虚拟样机技术的复杂工程机械动态仿真分析做了有意义的尝试,研究方法和思路可为类似的复杂机械系统进行相关研究提供借鉴和参考。
[Abstract]:The method of dynamic compaction is widely used in the world because of its advantages such as convenient construction, easy economy and simple technology. However, there is no national standard for the design and manufacture of dynamic rammer as a special equipment for dynamic compaction.At present, many domestic dynamic compaction equipments are improved by adding auxiliary devices to crawler cranes, and the design of special dynamic compaction machines is mainly based on the design methods and standards of cranes.But the dynamic rammer has the characteristics of high full load rate, sudden unloading and frequent operation compared with the common crane.Therefore, it is necessary to study the dynamic characteristics of the whole machine based on the analysis of the strength and stiffness of the key structure of the dynamic rammer.Based on the dynamic simulation software ADAMS and the finite element analysis software ANSYS, the flexible multi-body dynamic model of the dynamic rammer is established in this paper, which is developed by the Institute of Construction Machinery of Dalian University of Technology as the research object, and the dynamic simulation software ADAMS as the platform.On the basis of considering the influence of the working site of the dynamic rammer, the paper introduces the ground mechanics, and develops the crawler-ground mechanics model by using the user subprogram in ADAMS/View with C language.On the basis of different ground types, different amplitude and anti-tilting hydraulic cylinder, the simulation research is carried out.Through the analysis of the results, it is found that the design of the rear pull rod of the herringbone frame is insufficient, and the pressure peak value of the hydraulic circuit of the anti-tilting leg is too large.The results of dynamic compaction at 9.7 t and 20t are in good agreement with that of the physical prototype with an error of 13.40.The results show that the dynamic compaction is better than that of the physical prototype, and the error is 13.4t.The results can be used as a reference for the design and improvement of dynamic rammer.The dynamic simulation and analysis of complex construction machinery based on virtual prototyping technology is made a meaningful attempt. The research methods and ideas can provide reference and reference for similar complex mechanical systems.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH113

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