第43卷第1期辽宁工业大学学报(自然科学版)Vol.43,No.12023年2月JournalofLiaoningUniversityofTechnology(NaturalScienceEdition)Feb.2023收稿日期:2022-07-17作者简介:崔雪(1993-),男(满族),辽宁锦州人,助教,硕士。DOI:10.15916/j.issn1674-3261.2023.01.011.横向磁场中轴向运动铁磁梁的固有振动崔雪1,胡宇达2,刘伟1(1.辽宁工业大学土木建筑工程学院,辽宁锦州121001;2.燕山大学建筑工程与力学学院,河北秦皇岛066004)摘要:研究了磁场环境中做轴向运动铁磁梁的磁弹性固有振动问题。考虑梁在变形时产生的摄动磁场,给出梁在力、运动和电磁作用下的动能、应变能以及电磁力和电磁力矩的表达式。应用哈密顿变分原理,推导出磁场中做轴向运动铁磁梁的磁弹性双向振动方程。考虑两端铰支的边界条件,应用伽辽金积分法,求解出梁在双向振动时的有阻尼和无阻尼固有频率表达式。最后给出了系统振动响应图、相轨迹图以及固有频率随磁感应强度和轴向速度变化的曲线图。关键词:铁磁梁;固有振动;摄动磁场;固有频率中图分类号:O322;O442文献标识码:A文章编号:1674-3261(2023)01-0047-05NaturalVibrationofanAxiallyMovingFerromagneticBeaminaTransverseMagneticFieldCUIXue1,HUYu-da2,LIUWei1(1.SchoolofCivilandArchitecturalEngineering,LiaoningUniversityofTechnology,Jinzhou121001,China;2.SchoolofCivilEngineeringandMechanics,YanshanUniversity,Qinhuangdao066004,China)Abstract:Themagnetoelasticnaturalvibrationofanaxiallymovingferromagneticbeaminamagneticfieldisstudied.Theexpressionsofkineticenergy,strainenergy,electromagneticforceandelectromagneticmomentofthebeamundertheactionofforce,motionandelectromagneticforcearegiven.BasedonHamiltonvariationalprinciple,themagnetoelastictwo-wayvibrationequationofaferromagneticbeammovingaxiallyinamagneticfieldisderived.Consideringtheboundaryconditionsoftwohingedends,theexpressionsofthenaturalfrequenciesofthebeamwithandwithoutdampingareobtainedbyusingtheGalerkinintegralmethod.Finally,thevibrationresponsediagram,phasetrajectorydiagramandthenaturalfrequencycurvewiththemagneticinductionintensityandaxialvelocityaregiven.Keywords:ferromagneticbeam;naturalvibration;perturbationmagneticfield;naturalfrequency在工程实际中,...