基于NSGA-Ⅱ和TOPSIS法的横波可控震源振动器平板疲劳寿命优化  

Fatigue life optimization of sheer wave vibroseis vibrator baseplate based on NSGA-Ⅱand TOPSIS method

作　　者：陈振[1,2] 冉庆杰 英晓洋 陈能鹏 魏超成 王乔木 CHEN Zhen;RAN Qingjie;YING Xiaoyang;CHEN Nengpeng;WEI Chaocheng;WANG Qiaomu(School of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China;Sichuan Key Laboratory of Shale Gas Evaluation and Exploitation,Chengdu 610500,China)

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]页岩气评价与开采四川省重点实验室,四川成都610500

出　　处：《工程设计学报》2025年第2期272-280,共9页Chinese Journal of Engineering Design

基　　金：页岩气评价与开采四川省重点实验室资助项目(YSK2022013);四川省科技厅自然科学基金面上项目(2024NSFSC0094)。

摘　　要：横波可控震源振动器平板作为页岩气勘探中的关键部件,其疲劳寿命直接影响可控震源的使用寿命和勘探精度。然而,传统的振动器平板疲劳寿命优化方法未考虑平板与平板齿间焊接残余应力的影响,导致平板结构在抗疲劳优化设计方面效果不佳。为此,使用局部灵敏度法对平板疲劳寿命进行敏感性分析,确定了焊接残余应力为影响疲劳寿命的关键因素。随后,建立了平板的各向最大焊接残余应力与焊接速度和焊接层间温度之间的数学模型,并以各向最大焊接残余应力为约束,以疲劳寿命为优化目标,建立相应的优化模型。最后,利用NSGA-Ⅱ(nondominated sorting genetic algorithm-Ⅱ,非支配排序遗传算法-Ⅱ)获取Pareto解集,并结合熵权法和TOPSIS(technique for order preference by similarity to ideal solution,逼近理想解排序)法确定最佳优化方案:焊接速度为10.23 mm/s,焊接层间温度为105℃。结果表明,优化后平板的疲劳寿命为10.23年,相比优化前提高了17.72%。研究结果可为横波可控震源振动器平板的疲劳寿命优化提供科学有效的理论方法和工程指导。The sheer wave vibroseis vibrator baseplate is a key component in shale gas exploration,and its fatigue life directly affects the service life of vibroseis and the exploration accuracy.However,traditional optimization methods for vibrator baseplate fatigue life ignore the welding residual stress between the baseplate and the baseplate teeth,resulting in poor performance in anti-fatigue optimization design for the baseplate structure.Therefore,the local sensitivity method was used to conduct a sensitivity analysis for the fatigue life of the baseplate,and the welding residual stress was determined as the key factor affecting the fatigue life.Subsequently,mathematical models between the maximum welding residual stresses in all directions of the baseplate and the welding speed and interlayer temperature were established.Meanwhile,with the maximum welding residual stresses in all directions as the constraints and the fatigue life as the optimization target,the corresponding optimization model was constructed.Finally,the NSGA-Ⅱ(non-dominated sorting genetic algorithm-Ⅱ)was used to obtain the Pareto solution set,and the best optimization scheme was determined by combining the entropy weight method and the TOPSIS(technique for order preference by similarity to ideal solution):the welding speed was 10.23 mm/s and the welding interlayer temperature was 105℃.The results showed that the fatigue life of the optimized baseplate was 10.23 years,which was 17.72%higher than that before optimization.The research results can provide scientific and effective theoretical methods and engineering guidance for the fatigue life optimization of the sheer wave vibroseis vibrator baseplate.

关 键 词：横波可控震源 振动器平板 疲劳寿命 焊接残余应力 NSGA-Ⅱ TOPSIS法 

分 类 号：TH16[机械工程—机械制造及自动化]