基于拓扑优化方法的BV500型可控震源振动器平板激振性能改善研究  

Study on improvement for the excitation performance of BV500 type controlled seismic source vibrator plate based on topology optimization method

作　　者：黄志强[1] 付铭威 席御僖 李刚[1] 王若豪 蒲伟 HUANG Zhiqiang;FU Mingwei;XI Yuxi;LI Gang;WANG Ruohao;PU Wei(School of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China;Southwest Geophysical Exploration Branch of BGP INC.,China National Petroleum Corporation,Chengdu 610213,China)

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]中国石油集团东方地球物理公司勘探有限责任公司西南物探分公司,成都610213

出　　处：《机械强度》2025年第2期75-84,共10页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(41902326);四川省科学与技术项目(22GJHZ0284);南充市-西南石油大学市校科技战略合作专项(SXHZ048);企业横向合作项目(JSTKY-22-002)。

摘　　要：BV500型可控震源振动器在川渝地区作业过程中,由于平板设计不合理,导致振动能量下传率低、激发信号畸变严重。因此,引入连续体拓扑优化方法,采用固体各向同性材料惩罚(Solid Istropic Material with Penalization,SIMP)模型变密度法,从降低质量和增加刚度两个方面对BV500型可控震源振动器平板进行优化设计,创新研制了一种“八边形工字钢-20a”平板。优化后平板质量减轻了45.29%,平板刚度提升了79.92%,并开展了优化前后平板激振性能研究。仿真研究结果表明,与原铝合金整体平板相比,“八边形工字钢-20a”平板的能量下传率提高了15.11%,地表接触中心点位移振幅增大了43.74%,互作用力振幅提升了40.56%。现场实验表明,“八边形工字钢-20a”平板激振时,检波器近场信号平均振动速度有效值提升了22.23%,检波器远场信号平均振动速度有效值提升了39%,规律与可控震源道路激振数值仿真模拟结论一致。“八边形工字钢-20a”平板激振性能优于原铝合金整体平板,有效改善了BV500型可控震源在川渝地区道路激振效果。During the operation of the BV500 type controlled seismic source vibrator in Sichuan and Chongqing areas,due to the improper plate design,the vibration energy down-transfer rate is low and the excitation signal distortion is serious.Therefore,the continuum topology optimization method was introduced,and a variable density method of the solid isotropic material with penalization(SIMP)model was used to optimize the design of BV500 controlled seismic source vibrator plate from two aspects—reducing mass and increasing stiffness,and an“octagonal I-steel-20a”plate was innovatively developed.After optimization,the mass of the plate was reduced by 45.29%,and the stiffness of the plate was increased by 79.92%,the vibration performance of the plate before and after optimization is studied.The simulation results show that compared with the original aluminum alloy plate,the energy down-transfer rate of the“octagonal I-steel-20a”plate increases by 15.11%,the displacement amplitude of the ground surface contact center point increases by 43.74%,and the amplitude of the interaction force increases by 40.56%.The field experiment shows that when the“octagonal I-beam-20a”plate is excited,the effective value of the average vibration velocity of the near-field signal of the detector is increased by 22.23%,and the effective value of the average vibration velocity of the far-field signal of the detector is increased by 39%,the law is consistent with the numerical simulation conclusion of controlled seismic source road excitation.The excitation performance of the“octagonal I-beam-20a”plate is better than that of the original aluminum alloy integral plate,which effectively improves the road excitation effect of BV500 type controlled seismic source in Sichuan and Chongqing areas.

关 键 词：可控震源 振动器平板 激振性能 拓扑优化 振动试验 

分 类 号：TH123[机械工程—机械设计及理论]