摘要
为充分挖掘盾构机刀盘优化承载形态,在经典布局方案基础上进一步探索动力学承载结构变异重构机制,以显式拓扑优化方法为设计工具,驱动盾构机刀盘承载架构的变异与重构,结合能量有限元分析方法,通过引导并强化盾构机刀盘振动能量耗散,实现对结构动响应的抑制。针对某型土压平衡式盾构机刀盘结构进行了设计验证,结果表明:在相同开口率和载荷输入条件下,所设计的盾构机刀盘面板结构对比原始结构,平均变形量减小了24.49%,最大应力降低了41.34%,静力学性能得到提升;优化结构相比于原始结构,其能量柔度改善超过22.0%,最大动响应降低7.8%,最小动响应降低27.7%,动力学性得到有效提升。能量视角下的结构变异重构设计方法具有良好的工程应用价值,可为以盾构机为代表的大尺寸结构动力学设计提供一种新思路。
In order to fully explore the optimized load-bearing structure of the tunnel boring machine cutterhead,the variation and reconstruction mechanism for the dynamic load-bearing structure based on the classical layout scheme was further researched.Specifically,the explicit topology optimization method was used as a design tool to drive the variation and reconstruction of the load-bearing structure of the tunnel boring machine cutterhead and the EFEM was also used to achieve the suppression of the structural dynamic response by guiding and enhancing the dissipation of the vibration energy of the tunnel boring machine cutterhead.In this paper,the cutterhead structure of a certain type of the EPB tunnel boring machine was verified.The verification results show that under the same opening rate and load input conditions,compared with the original cutterhead structure,the average deformation of the cutterhead structure designed in the paper is reduced by 24.49%,the maximum stress is reduced by 41.34%,and the statics performance is improved;compared with the original cutterhead structure,the energy flexibility of the optimized cutterhead structure is improved by more than 22.0%,the maximum dynamic response and the minimum dynamic response are reduced by 7.8%and 27.7%respectively,and the dynamic performance is effectively improved.Therefore,the structural variation and reconstruction design method from the view of energy proposed in this paper has great engineering application value and also provides a new idea for the dynamics design of large-size structures represented by tunnel boring machines.
作者
刘宏磊
宋晨旭
鲁睿
李宝童
洪军
LIU Honglei;SONG Chenxu;LU Rui;LI Baotong;HONG Jun(School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2023年第9期109-122,共14页
Journal of Xi'an Jiaotong University
基金
国家重点研发计划资助项目(2018YFB1700703)。
关键词
盾构机刀盘
结构变异
能量有限元
拓扑优化
cutterhead panels
structural variation
energy finite element method
topology optimization
