压裂车车架动态特性分析

发布时间：2018-01-30 11:00

本文关键词： 车架动态特性有限元模型模态分析谐响应　出处：《科学技术与工程》2017年31期 　论文类型：期刊论文

【摘要】：为研究压裂车车架的动态特性,以避开其共振频率,达到延长寿命的目的。应用有限元法,基于SPRING和RIGID BEAM单元模拟悬架,建立SHELL单元为主的车架有限元模型,对车架进行前6阶模态分析并与模态实验结果对比,误差13%以内证明有限元模型准确性,并对振型及应变能云图进行评价。考虑作业过程中载荷特点,研究动载荷作用下车架的谐响应特性,获得特定位置的位移、加速度响应曲线。计算结果表明:压裂车车架的频率分布合理,避开了发动机的怠速频率,主车架前部结构相对薄弱;泵的激励对压裂车振动影响较大,泵在工作时注意避开2.5 Hz、3.6 Hz工作频率,该频率附近车架易引起共振。
[Abstract]:In order to study the dynamic characteristics of the fracturing truck frame, to avoid its resonance frequency and to prolong its life, the finite element method is used to simulate the suspension based on SPRING and RIGID BEAM element. The finite element model of the frame based on SHELL element is established. The first 6 order modal analysis of the frame is carried out and compared with the results of modal experiment. The error within 13% proves the accuracy of the finite element model. The vibration mode and strain energy cloud diagram are evaluated. Considering the load characteristics during the operation, the harmonic response characteristics of the frame under the dynamic load are studied, and the displacement at a specific position is obtained. The results show that the frequency distribution of the frame of the fracturing vehicle is reasonable and the idling frequency of the engine is avoided. The front structure of the main frame is relatively weak. The excitation of the pump has a great influence on the vibration of the fracturing truck. The pump should avoid the working frequency of 2.5 Hz or 3.6 Hz when working, and the frame near this frequency can easily cause resonance.
【作者单位】：盾构及掘进技术国家重点实验室;中国石油大学(北京)机械与储运工程学院;
【基金】：国家高技术研究发展计划(“863”计划)项目(2012AA041802) 国家重点基础研究发展计划(“973”计划)项目(2014CB046906)资助
【分类号】：TE934.2
【正文快照】： 项目(2012AA041802)和国家重点基础研究发展计划(“973”计划)项目(2014CB046906)资助引用格式: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—351Wang Kai,Zhang Shimin.Dynamic characteristics analysis of fracturingtruck frame[J].Science Te

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