共查询到18条相似文献，搜索用时 140 毫秒
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应用Pro/E对平板式半挂车车架进行三维实体建模。对该模型进行简化处理、抽中面和修补后导入ANSYS。采用壳单元建立平板式半挂车车架的有限元模型,对车架进行静力分析和模态分析。结果表明,车架在弯曲和扭转工况下,刚度和强度满足要求;车架结构的低阶模态频率不在路面激励频带之内,不会产生共振现象。 相似文献
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为改进车架的设计,应用CAD/CAE技术对3.6m货车车架进行计算.利用Pro/E建立车架的三维实体模型,对该模型进行必要的修改形成筒化模型,将简化模型导入ANSYS环境中,最后进行弯曲工况下的强度校核计算. 相似文献
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该文在Hypermesh对将导入的三维模型进行修复、简化和几何清理,并划分有限元网格,建立车架有限元模型。利用Hyper OptiStruct分析车架的自由模态,并与参考车型模态进行比较分析;分析车架的静强度、弯曲和扭转刚度,验证车架结构性能。根据分析结果,优化设计车架结构尺寸,改进车架结构。 相似文献
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轻型货车车架有限元建模与动态特性分析 总被引：1，自引：0，他引：1
黄鼎键 《福建工程学院学报》2008,6(Z1)
车架可靠性对整车的安全性有着重要的作用.为了获得车架的动态特性,运用CAD/CAE技术建立某轻型载货汽车车架有限元模型,并对车架进行模态分析,获得前8阶固有频率及振型,最后,在模态分析基础上进行车架随机路面谱响应分析.结果表明,该分析可为改进车架结构设计,可以提高汽车运行过程的稳定性、安全性和舒适性. 相似文献
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针对某型车架满载时车身产生严重弯曲变形的问题,在有限元法的基础上,利用ANSYS软件建立车架三维有限元分析模型,并进行变形和应力计算机仿真分析,结合变形实验,得到车架变形及应力变化规律,找出了车架产生严重弯曲变形的原因,并对大梁截面尺寸进行优化,提出优化改进方案。 相似文献
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车架作为载货汽车的承载基体,对整车的性能有很大的影响,利用CATIA软件对汽车车架进行建模,对所建模型划分网格,并对其加载,进行强度和刚度校核,对车架模型进行束模态分析。通过分析,得到车架各阶固有频率和振型,知道车架的弯曲和扭转情况,在车架设计中就可以尽可能地避免共振。 相似文献
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振动理论在汽车车架改型设计中的应用 总被引：1，自引：0，他引：1
本文以汽车车架为工程背景,利用振动理论,建立了汽车车架的有限元计算模型,计算了车架的固有频率和振型,进行了动态特性分析,从中找出了影响车架结构动力特性的主导模态,为车架改型设计提供了参考。 相似文献
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用有限元法对摩托车车架强度的分析 总被引：2，自引：0，他引：2
建立有限元模型,应用有限元分析软件分析某型摩托车车架强度,为分析该摩托车车架断裂原因提供依据,并为车架的设计优化提供有益的参数. 相似文献
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张东贵刘成武肖开政王乾廷林光磊范永达 《福建工程学院学报》2020,(3):235-240
为解决车辆负载过重问题,对铝合金栏板车车身及车架进行三维建模,利用HyperWorks 构建车身及车架的有限元模型。 模拟栏板车满载时的弯曲、扭转、紧急制动和紧急转弯4 种工况,施加相应的载荷与边界条件。 经过有限元仿真分析,获得了该车身(包括车架) 在不同工况下的应力分布状况,在存有较大设计余量的基础上,采用减薄壁厚和移动横梁的方法对车身结构改进。 结果表明:改进后的车身结构能够满足各典型工况的强度和刚度性能要求,质量比改进前减少了5.7%,从而为栏板车的结构设计和改进提供依据。 相似文献
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为研究半挂车架设计及动态特性,使用ANSYS有限元软件对XWS9360TZ-1骨架式集装箱半挂车架进行模态分析,确定其固有频率和振型,以清晰的动态图象描述结构在受到激励时的表现,并分析其动态特性. 相似文献
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以轻钢结构临建房屋骨架结构试验为基础,采用有限元分析软件Ansys提出轻钢结构临建房屋的有限元计算模型建立方法,并对轻钢结构临建房屋骨架结构的水平侧移进行计算和分析。计算结果表明,所采用的有限元计算模型建立方法正确合理,且轻钢结构临建房屋骨架结构在设计荷载作用下的水平侧移不能满足规范要求。 相似文献
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Based on a series of previous studies, an experiment on the integral seismic behavior of a 1/3 scaled model of two-bay and three-story reinforced concrete frame with split columns at lower two stories is performed under cyclic loading. The original columns at lower two stories of the model frame are short columns and they are replaced by the split columns. The hysteresis curves between the horizontal cyclic load and the lateral displacement at the top of the model frame, indicate that under the cyclic loading, the model frame undergoes the process of cracking, yielding, and maxi-mum loading before being destroyed at the ultimate load. They also indicate that the model frame has better ductility, and the ratio of the ultimate displacement to the yielding displacement, reaches 6.0. The yielding process of the model frame shows that for the frame with split columns, plastic hinges are generated at the ends of beams and then the columns begin yielding while the frame still possesses the bearing and deformation capacity. The design idea of directly changing the short col-umn to long one in the reinforced concrete frame may be realized by replacing the short column with the split one. 相似文献
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Numerical Simulation of Dynamic Response and Collapse for Steel Frame Structures Subjected to Blast Load 总被引：4，自引：0，他引：4
The progressive collapse of steel frame structures under the blast load was investigated using LS-DYNA. The multi-material Eulerian and Lagrangian coupling algorithm was adopted. A flu-id-structure coupling finite element model was established which consists of Lagrange element for simulating steel frame structures and concrete ground, multiple ALE element for simulating air and TNT explosive material. Numerical simulations of the blast pressure wave propagation, struc-tural dynamic responses and deformation, and progressive collapse of a five-story steel frame structure in the event of an explosion near above ground were performed. The numerical analysis showed that the Lagrangian and Eulerian coupling algorithm gave good simulations of the shock wave propagation in the mediums and blast load effects on the structure. The columns subjected to blast load may collapse by shear yielding rather than by flexural deformation. The columns and joints of steel beam to column in the front steel frame structure generated enormous plastic defor-mation subjected to intensive blast waves, and columns lost carrying capacity, subsequently lead-ing to the collapse of the whole structure. The approach coupling influence between struc-tural deformation and fluid load well simulated the progressive collapse process of structures, and provided an effective tool for analyzing the collapse mechanism of the steel frame structure under blast load. 相似文献
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The progressive collapse of steel frame structures under the blast load was investigated using LS-DYNA.The multi-material Eulerian and Lagrangian coupling algorithm was adopted.A fluid-structure coupling finite element model was established which consists of Lagrange element for simulating steel frame structures and concrete ground,multiple ALE element for simulating air and TNT explosive material.Numerical simulations of the blast pressure wave propagation,structural dynamic responses and deformation,and progressive collapse of a five-story steel frame structure in the event of an explosion near above ground were performed.The numerical analysis showed that the Lagrangian and Eulerian coupling algorithm gave good simulations of the shock wave propagation in the mediums and blast load effects on the structure.The columns subjected to blast load may collapse by shear yielding rather than by flexural deformation.The columns and joints of steel beam to column in the front steel frame structure generated enormous plastic deformation subjected to intensive blast waves,and columns lost carrying capacity,subsequently leading to the collapse of the whole structure.The approach coupling influence between structural deformation and fluid load well simulated the progressive collapse process of structures,and provided an effective tool for analyzing the collapse mechanism of the steel frame structure under blast load. 相似文献
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在冲击荷载作用下,钢框架结构的动态响应是一个复杂的非线性过程。运用ANSYS/LS-DYNA建立了钢框架的三维模型,对冲击荷载作用下钢框架的动态响应和破坏形态进行研究。采取多点积分算法,有效避免沙漏问题,保证计算结果精确。以冲击块与钢框架的碰撞冲击为例,研究了冲击速度、冲击块质量、冲击位置等参数对钢框架在横向冲击作用下动力响应的影响,并分析冲击荷载下钢框架的破坏形态。结果表明:冲击块的质量、速度、冲击位置的增加都会不同程度地加剧钢框架的动态响应;在冲击作用下,高应变主要出现在被冲击柱子的冲击区域、柱脚处和梁柱节点处;冲击荷载下钢框架的破坏形态为整个框架发生侧移,受冲击柱在冲击处翼缘出现局部屈曲,受冲击区域的截面发生弯扭,未受冲击柱出现倾斜。 相似文献
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To investigate the bilateral shear strength of rectangular frame column subjected to oblique horizontal load, we presented a simplified space truss-arch model developed from unilateral truss-arch model. Main parameters in the new model were the cross-sectional area, transverse reinforcement raito, axial load, and material strength of the column. The reduction coefficient of concrete sterength owing to the severe cracking of column was also introduced in the model. Finally, 14 specimens under oblique horizontal load were tested to verified the feasibility and applicability of the space truss-arch model. 相似文献