某车载固压设备车架结构强度及模态分析
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摘要
车载固压设备在道路行驶以及工作时主要承受弯曲、扭转、纵向及侧向等类型的载荷,为验证其车架强度及动态特性,对其进行了结构强度和模态分析。首先建立该车架三维模型,然后导入ANSYS中,建立有限元模型;最后对其进行模态分析及4种典型工况(满载弯曲、满载扭转、紧急制动和紧急转弯工况)下的强度分析。研究结果表明:自由模态下车架前12阶固有频率在48 Hz内,车架无共振现象,但约束模态下频率有所增加;车架在紧急转弯工况下应力最大,为213 MPa,低于车架屈服极限,满足车架结构设计要求。研究结果为车架响应分析提供了重要模态参数,为车载固压设备的结构设计提供了参考。
Truck-mounted cementing equipment mainly bears bending,torsion,longitudinal and lateral loads during road driving and working. To verify the strength and dynamic characteristics of the truck frame,the structural strength and modal analysis are carried out. The three-dimensional model of the truck frame is built,and then imported into ANSYS to establish a finite element model. The modal analysis and the strength analysis under four typical working conditions( full load bending,full load torsion,emergency braking and emergency turning conditions) are conducted. The results show that the former 12-order natural frequency of the truck frame under free mode is within 48 Hz,and the frame has no resonance. But the frequency is increased under constraint mode. The frame has the highest stress of 213 MPa under the emergency turning condition,which is lower than the frame yield limit that meets the frame design requirements. The research results offer important modal parameters for truck frame response analysis,which provides a reference for the structural design of truck-mounted cementing equipment.
Truck-mounted cementing equipment mainly bears bending,torsion,longitudinal and lateral loads during road driving and working. To verify the strength and dynamic characteristics of the truck frame,the structural strength and modal analysis are carried out. The three-dimensional model of the truck frame is built,and then imported into ANSYS to establish a finite element model. The modal analysis and the strength analysis under four typical working conditions( full load bending,full load torsion,emergency braking and emergency turning conditions) are conducted. The results show that the former 12-order natural frequency of the truck frame under free mode is within 48 Hz,and the frame has no resonance. But the frequency is increased under constraint mode. The frame has the highest stress of 213 MPa under the emergency turning condition,which is lower than the frame yield limit that meets the frame design requirements. The research results offer important modal parameters for truck frame response analysis,which provides a reference for the structural design of truck-mounted cementing equipment.
引文
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[2]侯康,孙桓五.某新型半挂车车架静态特性与模态分析[J].机械设计与制造,2017(8):172-174,178.HOU K,SUN H W.Static characteristics and modal analysis of a new type of semi-trailer frame[J].Machinery Design&Manufacture,2017(8):172-174,178.
[3]王锐,苏小平.汽车副车架强度模态分析及结构优化[J].机械设计与制造,2015(4):152-154.WANG R,SU X P.Strength modal analysis and structural optimization of automobile sub-frame[J].Machinery Design&Manufacture,2015(4):152-154.
[4]王凯,张仕民.压裂车车架动态特性分析[J].科学技术与工程,2017,17(31):346-351.WANG K,ZHANG S M.Analysis of dynamic characteristics of fracturing frame[J].Science Technology and Engineering,2017,17(31):346-351.
[5]白云,李舜酩,闻静,等.某轨道试验车车架结构强度与模态分析[J].车辆与动力技术,2017(4):17-22,27.BAI Y,LI S M,WEN J,et al.Structural strength and modal analysis of a track test vehicle frame[J].Vehicle&Power Technology,2017(4):17-22,27.
[6]刘健,肖柳胜,吴汉川,等.油田压裂车车架的多工况疲劳寿命分析[J].石油机械,2014,42(1):75-78.LIU J,XIAO L S,WU H C,et al.Fatigue life analysis of oilfield fracturing frame with multiple working conditions[J].China Petroleum Machinery,2014,42(1):75-78.
[7]肖柳胜,刘健,袁艳艳,等.基于多工况的重载压裂车车架静动态强度分析[J].西华大学学报(自然科学版),2015,34(1):153-157.XIAO L S,LIU J,YUAN Y Y,et al.Static and dynamic strength analysis of heavy-duty fracturing truck frame based on multiple operating conditions[J].Journal of Xihua University(Natural Science Edition),2015,34(1):153-157.
[8]FICHERA G,LACAGNINA M.Modeling of torsion beam rear suspension by using multibody method[J].Multibody System Dynamics,2005,12(4):302-316.
[9]尹辉俊,韦志林,沈光烈.货车车架的有限元分析[J].机械设计,2005,22(11):26-28.YIN H J,WEI Z L,SHEN G L.Finite element analysis of freight car frame[J].Machinery Design,2005,22(11):26-28.
[10]任可美,戴作强,郑莉莉,等.纯电动城市客车底盘车架的模态分析与优化[J].制造业自动化,2018,40(1):45-50,64.REN K M,DAI Z Q,ZHENG L L,et al.Modal analysis and optimization of chassis frame of pure electric city bus[J].Manufacturing Automation,2018,40(1):45-50,64.
[11]黄海华.汽车车架载荷强度优化设计仿真[J].计算机仿真,2017,34(11):114-118,206.HUANG H H.Simulation design of vehicle frame load strength optimization[J].Computer Simulation,2017,34(11):114-118,206.