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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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某公司部分商用车发动机上的暖气开关为手动式,当夏天使用空调制冷时应手动将其关闭。如果不装或不关此开关,分析空调制冷效果会打折扣,甚至会影响整车油耗。实际上制冷效果的折扣及影响到底有多大,一直没有试验数据说明,以至于很多人认为此开关可有可无,甚至某公司有几种发动机机型根本没有预留开关位置而无法装配。就此问题进行试验,验证关闭开关时空调制冷效果是否更好,油耗能否得到改善。分别利用J5M、悍V、天V三个车型就暖气开关打开与关闭时,进行空调制冷能力和油耗试验,得出数据证明在使用空调时关闭暖气开关不仅可以大大提高空调制冷能力、降低油耗,同时还定量得出影响大小,继而得出结论暖气开关并非可有可无,所有发动机型都应该安装。 相似文献
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