静力学分析中时间概念的具体含义

yitianlgl

小弟正在分析一个旋转件，用的是Static general分析步，可是网上有人说静力学分析中时间没有物理意义，不太理解是什么意思，希望知道的给解答一下，谢谢！

songhengxu

1# yitianlgl
静力学么，相当于静态的，没有时间的作用（加速度，惯性效应）。
所以你step设定的时间其实就相当于一个计算的标尺，譬如step=1,那么当你计算到时间步达到0.88时，就相当于你这个问题计算了总规模的88%。还有12%就整体就算完成了、

JingheSu

如何设置了材料的率相关数据，在进行静态分析，这个时候时间是不是就有了一定的作用？

songhengxu

3# JingheSu
Rate-dependent yield (“Rate-dependent yield,” Section 20.2.3), hysteresis (“Hysteresis in elastomers,” Section 19.8.1), and two-layer viscoplasticity (“Two-layer viscoplasticity,” Section 20.2.11) are the only time-dependent material responses that are active during a static analysis. The rate-dependent yield response is often important in rapid processes such as metal-working problems. The hysteresis model is useful in modeling the large-strain, rate-dependent response of elastomers that exhibit a pronounced hysteresis under cyclic loading. The two-layer viscoplasticity model is useful in situations where a significant time-dependent behavior as well as plasticity is observed, which for metals typically occurs at elevated temperatures. An appropriate time scale must be specified so that Abaqus/Standard can treat the rate dependence of the material responses correctly.
Static creep and swelling problems and time-domain viscoelastic models are analyzed by the quasi-static procedure (“Quasi-static analysis,” Section 6.2.5). When any of these time-dependent material models are used in a static analysis, a rate-independent elastic solution is obtained and the chosen time scale does not have an effect on the material response. For creep and swelling behavior this implies that the loading is applied instantaneously compared with the natural time scale over which creep effects take place.
只是课上听说了率相关，并没有做过，不过帮助里面这段话表明还是有关的。

JingheSu

恩，是有关的。

guoyj8

静力学 -- 从名字和力学本身上讲，如2楼所言是跟时间尺度无关的，因此在CAE计算时时间是作为一个加载过程的比例标尺的，用1和10没有什么分别，只是用0到1表示加载开始和结束还是0到10表示加载开始到结束。
ABAQUS/STANDARD中的general static是用隐式求解器计算力学问题，包括静力学问题，但不限于静力学问题，特殊问题，如3楼讲的率相关（即速度相关--也就和时间相关）等，则就必须考虑时间的实际物理意义了。

yangerrol

在静力学分析中，与率相关的参数可能会被忽略。

yangerrol

在静力学分析中，与率相关的参数可能会被忽略。