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基于虚拟试验场的坑洼路动态载荷研究 被引量:4
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作者 杨建森 李欣 王新宇 《重庆理工大学学报(自然科学)》 CAS 北大核心 2019年第7期21-27,共7页
试验场耐久工况载荷谱是汽车零部件疲劳寿命精准分析的必要输入,目前行业内通常把物理样车采集的车轮六分力应用到多体动力学模型的分解计算中,而虚拟试验场的日渐成熟正逐渐取代这一应用十几年的技术路线。坑洼路是试验场耐久试验中极... 试验场耐久工况载荷谱是汽车零部件疲劳寿命精准分析的必要输入,目前行业内通常把物理样车采集的车轮六分力应用到多体动力学模型的分解计算中,而虚拟试验场的日渐成熟正逐渐取代这一应用十几年的技术路线。坑洼路是试验场耐久试验中极具代表性的工况,具有频率高、非线性大的特点,为提升其仿真精度,将柔性化车身和FTire轮胎模型应用到整车多体动力学建模中。结果显示:虚拟试验场仿真的车轮六分力、减震器位移及其轴向力与实车采集数据对比均有很好的相关性,说明虚拟试验场技术是一种在汽车开发早期获取试验场耐久工况载荷谱的可靠、有效方法。 展开更多
关键词 虚拟试验场 载荷谱 疲劳耐久 坑洼路
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Dodging the Potholes: The Spatio-Distribution and Socio-Economic Impacts of Potholes in the Residential Areas of Gweru, Zimbabwe
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作者 Mutekwa Timothy Matsa Mark Kanyati Kudzanai 《Journal of Environmental Science and Engineering(B)》 2012年第7期874-889,共16页
Since the year 2000, the city of Gweru has had an unprecedented proliferation of unattended potholes on most of its roads. These potholes have caused discomfort to the motoring public, caused death to others and damag... Since the year 2000, the city of Gweru has had an unprecedented proliferation of unattended potholes on most of its roads. These potholes have caused discomfort to the motoring public, caused death to others and damaged vehicles. This paper presents the results of a study that sought to establish the spatial distribution of potholes and determine their socio-economic impacts in Gweru's residential areas. Pothole location and dimensions were measured in the field whilst interviews and questionnaires were administered to vehicle owners, motor mechanic experts, drivers and the travelling public to determine their socio-economic and mechanical impacts. Stratified, convenience and purposive sampling methods were used in the selection of study streets and respondents to questionnaires and interviews. Results revealed that potholes are more concentrated in high density residential areas compared to low density areas. This is primarily due to the substandard construction of roads done in high density residential areas. Other causes of pothole formation identified during this study are poor drainage on the roads, rainfall impact, advanced age of roads, poor or lack of maintenance, type and volume of traffic as well as the effect of tree-root prying on paved surfaces. It is recommended that Gweru City Council enters into partnerships in road construction. The city should also establish fundraising projects to augment its budget. This would help ease problems of service delivery including road maintenance. Signposts can be erected to warn drivers about these hazards in the most affected streets and suburbs. It is also important that council set aside a toll-free telephone line link with road users so that areas where new potholes have been detected are quickly reported and attended to. This will not only save lives but also reduce road maintenance costs and vehicle damage. 展开更多
关键词 POTHOLE city council road maintenance high-density suburbs.
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