桩架新型变幅机构的动力学分析

曹博; 朱建新; 朱振新

doi:10.13433/j.cnki.1003-8728.20190180

桩架新型变幅机构的动力学分析

doi: 10.13433/j.cnki.1003-8728.20190180

曹博^1,,
朱建新^1,2, ,,
朱振新¹

1.
中南大学高性能复杂制造国家重点实验室, 长沙 410083
2.
山河智能装备股份有限公司国家级企业技术中心, 长沙 410100

基金项目:

长沙市科技计划项目 kc1703021

长沙市科技计划项目 kc1701021

详细信息

作者简介:
曹博(1993-), 硕士研究生, 研究方向为复杂机械的力学行为、机电一体化控制研究, caobomail@126.com

通讯作者:
朱建新, 教授, 博士生导师, zjianx-918@163.com

中图分类号: TG156
计量
- 文章访问数: 199
- HTML全文浏览量: 105
- PDF下载量: 25
- 被引次数: 0
出版历程
- 收稿日期: 2019-04-24
- 刊出日期: 2020-04-05

Dynamic Analysis of New Variable Amplitude Mechanism of Pile Frame

Cao Bo^1
,,
Zhu Jianxin^{1,2
, ,},
Zhu Zhenxin¹

1.
State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China
2.
The National Enterprise R & D Center, Sunward Intelligent Equipment Co., Ltd., Changsha 410100, China

摘要

摘要: 为研究桩架新型多组液压缸变幅机构的动力学特性，首先采用牛顿欧拉法建立含移动副的五杆机构的动力学模型，并使用MATLAB软件对数学模型进行仿真，然后分析两种不同变幅方式下斜撑液压缸、后液压缸、关键铰接点的载荷变化情况，最后搭建了新型变幅机构试验平台进行试验验证，对动力学仿真结果与试验结果进行对比分析。结果表明：该动力学模型能反映新型多组液压缸变幅机构的动力学特性，在变幅过程中，斜撑液压缸先收缩后液压缸再收缩的变幅方式比后液压缸先收缩斜撑液压缸再收缩的变幅方式有更好的力学性能，且关键铰接点载荷波动更小，更有利于提高整机的稳定性。
- 变幅方式 /
- 动力学模型 /
- 牛顿欧拉法 /
- /
Abstract: In order to study the dynamic characteristics of the new multi-group hydraulic cylinder luffing mechanism of the pile frame, the dynamic models of the five-bar mechanism was established by Euler equations, and the mathematical model was simulated by MATLAB software. Then the load changes of the supporting hydraulic cylinder, the rear hydraulic cylinder and the key hinge point under two different amplitude modes are analyzed. Finally, a new variable amplitude mechanism test platform is set up for test verification, and the dynamic simulation results are compared with the test results. The results show that the kinetic model can reflect the dynamic characteristics of the new multi-group hydraulic cylinder luffing mechanism. In the luffing process, the variable amplitude mode of the hydraulic cylinder retracting after the hydraulic cylinder is firstly contracted is better than that of the other variable amplitude mode, and the load fluctuation of the key hinge point is smaller, which is more conducive to improving the stability of the whole machine.
- luffing mechanism /
- dynamic models /
- Euler equations /
- simulation /
- test platform

HTML全文

图 1 三种传统变幅机构示意图

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图 2 新型多组液压缸变幅机构简图

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图 3 刚体1的受力简图

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图 4 斜撑液压缸缸筒与缸杆的受力简图

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图 5 刚体4受力简图

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图 6 斜撑液压缸所受载荷

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图 7 后液压缸所受载荷

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图 8 铰接点B所受载荷

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图 9 铰接点C所受载荷

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图 10 变幅方式1时斜撑液压缸受力

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图 11 变幅方式1时后液压缸受力

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