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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(9):1227-1246
The influence of the tyre–road contact model on the simulated vertical vibration response was analysed. Three contact models were compared: tyre–road point contact model, moving averaged profile and tyre-enveloping model. In total, 1600 real asphalt concrete and Portland cement concrete longitudinal road profiles were processed. The linear planar model of automobile with 12 degrees of freedom (DOF) was used. Five vibration responses as the measures of ride comfort, ride safety and dynamic load of cargo were investigated. The results were calculated as a function of vibration response, vehicle velocity, road quality and road surface type. The marked differences in the dynamic tyre forces and the negligible differences in the ride comfort quantities were observed among the tyre–road contact models. The seat acceleration response for three contact models and 331 DOF multibody model of the truck semi-trailer was compared with the measured response for a known profile of test section. 相似文献
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用弹性稳定理论及弹塑性稳定理论,对下承式钢板梁的整体稳定问题进行了详细分析,由此说明了<铁路桥涵设计规范>(TBJ2-85)附录8中给出的公式及数据的适用性. 相似文献
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为了适应品种繁多的化学品运输,开发了适装性强的9000t不锈钢化学品船。设计时采用了奥氏体-铁素体双金属相不锈钢材料,很好地满足了高蒸气表压、高装运温度、高货品密度的设计要求,明显减轻了不锈钢重量、降低了造价,并改善船厂不锈钢施工的工艺。本文从五个方面讲述了结构设计中所需要特别注意的问题。 相似文献
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介绍了化学品船建造中首次采用双相不锈钢中防止板材损伤和污染,以及焊接以后不锈钢表面处理的技术措施,保证装焊的合格率在98%以上,达到较高的质量标准。 相似文献
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岳新华 《山东交通学院学报》2008,16(4)
建立了MZ1400T上行式双向移动模架主梁的有限元模型,通过有限元计算说明模架主梁浇注前后在自重作用下的变形及主梁纵向抗倾覆稳定系数均满足设计规范要求。通过工程实例说明该移动模架在箱梁线形、混凝土外观控制上都获得了一定的成效,对以后同类型桥梁的施工具有一定的参考价值。 相似文献
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试验研究了2205DSS焊接结构的母材区、融合区、热影响区分别在草酸、硝酸和盐酸溶液中的腐蚀速率。研究发现:该结构在草酸和沸腾的硝酸溶液中有较好的耐腐蚀能力,而在盐酸溶液中较差;熔合区腐蚀速率最快,母材区次之;在盐酸溶液中腐蚀速率随着温度的升高而加快,随着盐酸溶液浓度的增加先增加后降低,随着腐蚀时间的进行而降低。建立了腐蚀速率与盐酸溶液的温度、浓度、腐蚀时间之间的数学模型,该模型能快速计算该焊接结构在盐酸溶液中的腐蚀速率。 相似文献