The analysis of the problem of the finite length rod beingimpacted becomes very complex because viscoelasticity is introduced.

有限长细杆冲击问题的分析由于引入了粘弹性本构关系而变得比较复杂。

youdao

I make it very simple — I make the length one meter, and I hang on the rod, at the bottom, a mass m, which, let's say, is 500 kilograms.

为了简单-，假设长度为一米，我握住这棒子，底部挂质量M的物体，重为500公斤。

youdao

Whether the length of the rod returns to the original length.

棒子的长度是否，会回到原长。

youdao

In his love of angling for trout and other freshwater fish, Walton used a long rod of spliced ash and hazelwood, with a line of about the same length as the rod, made out of woven hair from a horse's tail.

WSJ: It Has Hooked Generations of Fishermen | Izaak Walton | The Compleat Angler | By H. George Fletcher