四川轻化工大学学报（自然科学版）2026，Vol.39Issue(2)：13-23,11.DOI:10.11863/j.suse.2026.02.02
弦振动筛网振动特性分析
Analysis of Vibration Characteristics of String Screen
摘要
Abstract
As drilling depth increases,the presence of ultra-fine particles and the complexity of drilling mud make solid-liquid separation more challenging.To overcome the low dewatering efficiency and persistently high solid-phase moisture content of ultra-fine drilling mud,a mud filter cake detachment method based on a string-vibrating screen is proposed in this study.By applying a single excitation source to the screen to induce string-type vibration and resonance,the filter cake is effectively assisted in detaching from the screen surface.A string vibration model of the screen is established to analyze its amplitude,acceleration,and stress-strain characteristics under different excitation frequencies.The results indicate that the transverse amplitude fluctuation of the screen exhibits a parabolic trend with frequency,with an amplitude fluctuation range of-8.02 to 9.62 mm at 50 Hz,which is 92.4%higher than that of traditional shale shakers.The longitudinal displacement amplitude of the screen fluctuates markedly as a function of excitation frequency,with multiple amplitude peaks emerging in the 40-50 Hz range and the extreme values being concentrated near the lateral positions of the screen.Furthermore,the screen velocity and acceleration are highly sensitive to frequency;within 40-50 Hz,the positive and negative velocity fluctuations become strongly asymmetric,resulting in substantially higher particle acceleration and,consequently,more efficient detachment of the drilling mud filter cake.关键词
弦振动/共振效应/振动特征/滤网脱附Key words
string vibration/resonance effect/vibration characteristics/filter detachment分类
矿业与冶金引用本文复制引用
王志恒,柳忠彬,严培轩,杨彪,彭帝..弦振动筛网振动特性分析[J].四川轻化工大学学报（自然科学版）,2026,39(2):13-23,11.基金项目
四川省科技厅项目(2021YFG0264) （2021YFG0264）
四川省凉山州重点研发计划项目(22ZDYF0164) （22ZDYF0164）
四川轻化工大学"652"科研创新团队项目(SUSE652A010) （SUSE652A010）
