DYNAMIC ANALYSIS OF THE RIGID-FLEXIBLE EXCAVATOR MECHANISM BASED ON VIRTUAL PROTOTYPE

IF 10.1 2区工程技术 Q1 ENGINEERING, MECHANICAL

Facta Universitatis-Series Mechanical Engineering Pub Date : 2022-07-28 DOI:10.22190/fume211028008y

Yongliang Yuan, Jianli Ren, Zhenxi Wang, Xiaokai Mu

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引用次数: 5

Abstract

In this paper, the excavator’s dynamic performance is considered together with the study of its trajectory, stress distribution and vibration. Many researchers have focused their study on the kinematics principle while a few others focused their work on dynamic performance, especially the vibration analysis. Previous studies of dynamic performance analysis have ignored the vibration effects. To address these challenges, the rigid-flexible coupling model of the excavator attachment is established and carried out based on virtual prototyping in this study. The dipper handle, the boom and the hoist rope are modeled as a flexible multi-body system for structural strength. The other components are modeled as a rigid multi-body system to catch the dynamic characteristics. The results show that the number of flexible bodies has little effect on the excavation trajectory. The maximum stress determined for the dipper handle and the boom are 96.45 MPa and 212.24 MPa, respectively. The dynamic performance of the excavator is greatly influenced by the clearance and is characterized by two phases: as the clearance decreases, the dynamic response decreases at first and then increases.

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基于虚拟样机的刚柔挖掘机机构动力学分析

本文考虑了挖掘机的动态性能，并对其轨迹、应力分布和振动进行了研究。许多研究人员把研究重点放在运动学原理上，而少数人把研究重点放在动力学性能上，特别是振动分析上。以往的动力性能分析研究忽略了振动的影响。为了解决这些问题，本研究基于虚拟样机技术建立了挖掘机附件的刚柔耦合模型。将斗柄、臂架和提升绳作为一个柔性多体系统进行结构强度建模。其他部件被建模为一个刚体多体系统，以捕捉其动态特性。结果表明:柔性体数量对开挖轨迹影响不大;斗柄和臂架的最大应力分别为96.45 MPa和212.24 MPa。挖掘机的动态性能受间隙影响较大，表现为两个阶段:随着间隙的减小，动态响应先减小后增大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Facta Universitatis-Series Mechanical Engineering ENGINEERING, MECHANICAL-

CiteScore

14.40

自引率

2.50%

发文量

审稿时长

6 weeks

期刊介绍： Facta Universitatis, Series: Mechanical Engineering (FU Mech Eng) is an open-access, peer-reviewed international journal published by the University of Niš in the Republic of Serbia. It publishes high-quality, refereed papers three times a year, encompassing original theoretical and/or practice-oriented research as well as extended versions of previously published conference papers. The journal's scope covers the entire spectrum of Mechanical Engineering. Papers undergo rigorous peer review to ensure originality, relevance, and readability, maintaining high publication standards while offering a timely, comprehensive, and balanced review process.