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Line heating process is a very complex phenomenon as a variety of factors affects the amount of residual deformations. Numerical
thermal and mechanical analysis of line heating for prediction of residual deformation is time consuming. In the present work
dimensional analysis has been presented to obtain a new relationship between input parameters and resulting residual deformations
during line heating process. The temperature distribution and residual deformations for 6 mm, 8 mm, 10 mm and 12 mm thick
steel plates were numerically estimated and compared with experimental and published results. Extensive data generated through
a validated FE model were used to find co-relationship between the input parameters and the resulting residual deformation
by multiple regression analysis. The results obtained from the deformation equations developed in this work compared well
with those of the FE analysis with a drop in the computation time in the order of 100 (computational time required for FE
analysis is around 7 200 second to 9 000 seconds and where the time required for getting the residual deformation by developed
equations is only 60 to 90 seconds). 相似文献
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鉴于最近倾向于使用有更高效率和更低热损耗的发动机,可用于车厢暖气设备的热量越来越少。一种可改进现用汽车水暖系统性能的方法是增加一个以汽油为燃料的预热器,即辅助加热器,但比其他辅助热源显得体积大、结构复杂、费用昂贵;另一种办法是用电加热座椅,但附加的热量仅仅局限于座椅而难于提高车厢的 相似文献
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車辆空气調节装置一、一般經过一般所說的空气調节装置,主要指冷气装置。冷气装置在日本铁路車辆上的采用,始于1936年,安装在特快列車“燕子”号的一辆餐車上,使用了以車軸驅动的发电机为其电源的冷气装置。最近几年, 相似文献
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装有车载暖气的客车在发动和提速时产生较大的噪音,会使乘车舒适度大打折扣。昌吉公交集团公司汽车修配厂针对这一问题开发出了客车用暖气消声器。 相似文献
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日本是汽车工业大国,近年来开发汽车节能减排技术也走在世界前列,重大项目有新能源汽车和清洁燃料汽车等,有的已经投产,如丰田汽车公司的“普锐斯”混合动力汽车,有的正在进行地区性实际运行验证试验,如大型DME(二甲醚)载货汽车的公路行驶试验,同时,也在细微处下功夫,以取得集少成多的效果。汽车行车过程中经常有停车、驻车发动机怠速运转的情况。 相似文献