﻿ 运用优化技术对挖掘机斗杆进行耐久性提升 Optimization Technique Used on Endurance Improving about the Arm of Excavator

Instrumentation and Equipments
Vol.06 No.01(2018), Article ID:24081,8 pages
10.12677/IaE.2018.61004

Optimization Technique Used on Endurance Improving about the Arm of Excavator

Xing Du, Hao Feng, Xingye Lv

Guangxi Liugong Machinery Co., Ltd., Liuzhou Guangxi

Received: Feb. 27th, 2018; accepted: Mar. 12th, 2018; published: Mar. 19th, 2018

ABSTRACT

To improve the endurance of the arm about one type excavator, this paper used the OptiStruct software to do optimization on the arm. In conceptual design phase, the topological optimization is used to define the total material layout. Based on the result, the original model is designed. And then the size optimization is used on the model. The new structure is design based on the result. It did FEA on the new structure and compared it with the old structure. The stress of the new structure on which positions we focused is 20% lower and the mass is 15 kilograms lower. At last, the verification test is done. It indicated that the design life of the new structure is one time higher than the old structure.

Keywords:Topological Optimization, Size Optimization, Verification Test, Arm Structure, Excavator

1. 引言

2. 结构优化设计方法

$\begin{array}{l}\mathrm{min}f\left(x\right),\text{\hspace{0.17em}}\text{\hspace{0.17em}}x\in {R}^{n}\\ \text{s}\text{.t}\text{.}\text{\hspace{0.17em}}\text{\hspace{0.17em}}{h}_{\nu }\left(x\right)=0,\text{\hspace{0.17em}}\text{\hspace{0.17em}}\nu =1,2,\cdots ,p\\ \text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{ }{g}_{u}\left(x\right)\le 0,\text{\hspace{0.17em}}\text{\hspace{0.17em}}u=1,2,\cdots ,m\end{array}$ (1)

x-设计变量， $x={\left[{x}_{1},{x}_{2},\cdots ,{x}_{n}\right]}^{i},x\in {R}^{n}$ ;

${h}_{\nu }\left(x\right)$ -等式约束函数

${g}_{u}\left(x\right)$ -等式约束函数

3. 斗杆优化设计

3.1. 概念设计建模

3.2. 拓扑优化分析

3.3. 尺寸优化分析

Figure 1. Topological optimization model

Figure 2. Topological optimization of arm

Figure 3. Size optimization model

3.4. 新结构有限元分析

4. 试验验证

4.1. 试验方案

1) 标定有限元模型(静态测试)；

Figure 4. Design variable

(a) 原结构 (b) 新结构

Figure 5. Comparing the stress result of new and old

Figure 6. Strain gauge position

Table 1. Comparing the stress of new and old

2) 动态测试工况，客户实际使用工况，采石场装车、甩料等工况。

4.2. 验证试验

4.2.1. 对标有限元模型(静态对标测试)

4.2.2. 客户采石场测试(动态测试对比)

4.3. 验证结果(数据处理)

Figure 7. Calibration test

Figure 8. Comparing the test and FEA result

Figure 9. Verification test of Customer at quarry

Figure 10. Comparing the stress of old and new structure in test

5. 结论

Figure 11. Comparing the design life of old and new structure

Optimization Technique Used on Endurance Improving about the Arm of Excavator[J]. 仪器与设备, 2018, 06(01): 20-27. https://doi.org/10.12677/IaE.2018.61004

1. 1. 史青录. 液压挖掘机[M]. 北京: 机械工业出版社, 2011.

2. 2. 施朝坤, 冯豪, 包刚强. 基于参数化方法的挖掘机动臂轻量化设计[J]. 工程机械, 2013, 44(12): 44-50.

3. 3. 宁晓斌, 刘亚冉, 李颉, 李光, 李佳林. 基于拓扑优化方法的大型液压挖掘机斗杆新型结构[J]. 中国机械工程, 2017, 28(16): 1936-1942.

4. 4. 李光, 胡凯, 李佳林, 谭磊, 宁晓斌. WYD260矿用液压挖掘机工作装置强度分析与轻量化设计[J]. 矿山机械, 2017, 45(7): 7-11.

5. 5. 吴盛彬, 刘孝保. 液压挖掘机动臂内部筋板的拓扑优化设计[J]. 新技术新工艺, 2014(8): 43-45.

6. 6. 张胜兰, 郑冬黎, 郝琪. 基于HyperWorks的结构优化设计技术[M]. 北京: 机械工业出版社, 2007.

7. 7. 洪清泉, 赵康, 张攀. OptiStruct & HyperStudy理论基础与工程应用[M]. 北京: 机械工业出版社, 2013.

8. 8. 周全, 李光, 吕晓林, 等. 基于多学科仿真的大型正铲液压挖掘机工作装置动态强度研究[J]. 机电工程, 2015, 32(3): 333-337.