In this paper, focus on vibrating problem of floor during one sedan development, the author finds out the reason lies to exhaust pipe system by road test and modal test.
针对某轿车开发过程中的地板振动问题，通过道路试验和模态试验，发现排气管的振动对地板振动影响很大，是地板振动的主要原因。
Tensile test shall be carried out on one pipe sample representing each inspection lot. But not less than one pipe sample representing each heat test.
每批检验品只抽一个钢管代表整批的来做张力测试，但是至少有一个以上样品代表整批做热度测试。
Tensile test shall be carried out on one pipe sample representing each inspection lot.
每批拉伸实验只要挑选1个样品钢管进行即可。
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