某车载固压设备车架结构强度及模态分析

Structural Strength and Modal Analysis of a Truck-mounted Cementing Equipment Frame

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.