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本帖最后由 wdhd 于 2016-8-1 10:58 编辑
一些文献上的free-free是指什么?两端都无约束么
。。。which are used in coupling the spindle (B) with the free–free model of the end mill (A).
。。。can be evaluated from a finite element model or an analytical beam model of the free–free beam, which represents the end mill.
。。。but to identify it from a constant spindle measurement, analytical modelof the free–free tool with constant assembly joint parameters.
After keeping the spindle–tool holder FRF parameters (h2,Mf, h2,ff, h2,MM) in a constant database and FRFs of a free–free end mill (hA11, hA12, hA21, hA22) of any geometry identified with FE, one can evaluate the FRF of a tool–spindle assembly (x1 / f1) using Eq. (10).
Fig. 3b shows the FE based free–free response of the long tool substructure modeled using Timoshenko beam elements。
The long blank cylinder was modeled with the FE method, and its free–free dynamics on both ends are calculated.
搞不懂这个free-free啥意思,帮帮忙了,谢谢! |
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