The recently developed hard-magnetic soft(HMS)materials can play a significant role in the actuation and control of medical devices,soft robots,flexible elec-tronics,etc.To regulate the mechanical behaviors of the cantilevered pipe conveying fluid,the present work introduces a segment made of the HMS material located some-where along the pipe length.Based on the absolute node coordinate formulation(ANCF),the governing equations of the pipe conveying fluid with an HMS segment are derived by the generalized Lagrange equation.By solving the derived equations with numerical methods,the static deformation,linear vibration characteristic,and nonlinear dynamic response of the pipe are analyzed.The result of the static deformation of the pipe shows that when the HMS segment is located in the middle of the pipe,the downstream portion of the pipe centerline will keep a straight shape,providing that the pipe is stable with a relatively low flow velocity.Therefore,it is possible to precisely regulate the ejection direction of the fluid flow by changing the magnetic and fluid parameters.It is also found that the intensity and direction of the external magnetic field greatly affect the stability and dynamic response of the pipe with an HMS segment.In most cases,the magnetic actuation increases the critical flow velocity for the flutter instability of the pipe system and suppresses the vibration amplitude of the pipe.

Zilong GUO;Qiao NI;Wei CHEN;Huliang DAI;Lin WANG

Department of Mechanics,Huazhong University of Science and Technology,Wuhan 430074,China;Hubei Key Laboratory for Engineering Structural Analysis and Safety Assessment,Wuhan 430074,China;State Key Lab of Digital Manufacturing Equipment and Technology,School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,Liaoning Province,China

应用数学和力学（英文版）

[1]Zilong GUO;Qiao NI;Wei CHEN;Huliang DAI;Lin WANG-.Dynamic analysis and regulation of the flexible pipe conveying fluid with a hard-magnetic soft segment)[J].应用数学和力学（英文版）,2022(09):1415-1430

cantilevered

Dynamic,analysis,regulation,flexible,pipe,conveying,fluid,hard,magnetic,soft,segment,recently,developed,HMS,materials,play,significant,role,actuation,control,medical,devices,robots,elec,tronics,etc,To,regulate,mechanical,behaviors,present,work,introduces,made,located,some,where,along,length,Based,absolute,node,coordinate,formulation,ANCF,governing,equations,are,derived,by,generalized,Lagrange,By,solving,numerical,methods,static,deformation,vibration,characteristic,nonlinear,dynamic,response,analyzed,result,shows,that,when,middle,downstream,portion,centerline,will,keep,straight,shape,providing,stable,relatively,flow,velocity,Therefore,possible,precisely,ejection,direction,changing,parameters,It,also,found,intensity,external,field,greatly,affect,In,most,cases,increases,critical,flutter,instability,system,suppresses,amplitude

0.513772