zhlbeyond 发表于 2009-12-2 20:49

ansys help中例子VM33(热-结构分析)中几处如何理解?

1.Due to symmetry, only a wedge of arbitrary height is required for modeling. A 5° wedge is selected to minimize curved geometry effects when using a lower order element
为什么要建立楔形单元,这样建模的力学原理是什么?低阶单元的曲面几何效应又是什么意思?
2.The thermal steady state condition is satisfied when the inner and outer wall temperature difference is constant
我理解的热稳态条件是结构中的温度不随时间变化,但这里说是内外壁的温差为恒定值,到底该怎么理解稳态条件??
3.Since the structural dynamic effects are not of concern, inertial and damping structural effects can be ignored, by specifying time integration for the temperature degree of freedom only.
我在它提供的程序中并没有找到只指定温度自由度的时间积分的语句,只有CNVTOL,HEAT 和CNVTOL,F,似乎还贴点边,但也不是。不知它在做得过程中是怎么实现的。此外,当考虑惯性效应和阻尼效应时,又该怎么设定??
还望大侠指点一二。上面英文是原话,中文是我的理解和问题。先谢了。
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