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工程设计学报
Chinese Journal of Engineering Design  2022, Vol. 29 Issue (1): 59-65    DOI: 10.3785/j.issn.1006-754X.2022.00.001
Optimization Design     
Performance analysis and optimization of disc ditcher based on sensitivity analysis
TAO Xiao-dong1, GUO An-fu1, LI Hui1, HAN Wei1, LI Wan-cai2, LI Tao2
1.School of Mechanical and Automotive Engineering, Liaocheng University, Liaocheng 252000, China
2.Shandong Gaotang Xinhang Machinery Co., Ltd., Liaocheng 252000, China
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Abstract  In order to solve the problem of cutterhead fracture during the operation of a disc ditcher, the response surface analysis method and sensitivity analysis method were used to analyze and optimize the performance of the ditcher. Firstly, the simulation model of the ditcher was established, and the dynamic simulation of the cutter of the ditcher was carried out by using the finite element analysis method. Through the response surface analysis, it was concluded that the stress concentration at the edge of the cutterhead was the main reason for the fracture of the cutterhead; secondly, through sensitivity analysis, the sensitivity of the maximum stress leading to the fracture of the cutterhead to the stress of each cutter was obtained, and a multi-condition optimization model based on different values of stress on cutter, cutter material elastic modulus and cutterhead thickness was established; finally, the cutterhead material was selected according to the optimization model, and the optimization scheme was obtained, that was, the cutterhead performance was the best when the cutterhead material was Q245. It was concluded from the user's feedback that the improved scheme could effectively solve the problem of cutterhead cracking of ditcher and improve the service life of the ditcher.

Received: 02 September 2020      Published: 28 February 2022
CLC:  TH 122  
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Cite this article:

TAO Xiao-dong, GUO An-fu, LI Hui, HAN Wei, LI Wan-cai, LI Tao. Performance analysis and optimization of disc ditcher based on sensitivity analysis. Chinese Journal of Engineering Design, 2022, 29(1): 59-65.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn.1006-754X.2022.00.001     OR     https://www.zjujournals.com/gcsjxb/Y2022/V29/I1/59


基于灵敏度分析的盘式开沟机性能分析及优化

为了解决某盘式开沟机工作时刀盘断裂的问题，采用响应面分析方法和灵敏度分析方法对开沟机进行性能分析及优化。首先，建立了开沟机仿真模型，利用有限元分析法对开沟机刀具进行动力学仿真，通过响应面分析得出了刀盘边缘应力集中是刀盘断裂的主要原因；其次，通过灵敏度分析得到了导致刀盘断裂的最大应力对各刀具受力的灵敏度，建立了基于不同刀具受力值、刀具材料弹性模量和刀盘厚度的多工况优化模型；最后，根据优化模型对刀盘材料进行选择，得到了优化方案，即刀盘材料为Q245时刀盘性能最好。从各地用户的使用反馈可知，改进方案能够有效解决开沟机刀盘开裂的问题，提高开沟机的使用寿命。
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