求翻译：初始设计结构离散为单元长度为2mm的20结点Solid90六面体单元，共7816个单元。为使分析计算的结果更加精确，取初始删除率RR0为1%,进化率ER为1%。利用所编APDL程序计算出不同删除率下的结构拓扑如图3所示，结构总体积迭代历程如图4所示。是什么意思？

Initial design structure of the discrete unit length 2mm 20 nodes solid90 six icosahedral units, a total of 7816 units. More accurate analysis of the results, taking the initial delete rr0 1% er of the evolutionary rate of 1%. Compiled apdl program calculated delete rate structure topology shown in

Initial design of structural discrete to unit length is 2 mm 20 point of the 906 panel Solid unit, a total of 7816 units. In order to analyze the results of the calculation more accurate, and delete the original RR Rate 0 to 1 per cent, ER evolution for 1 per cent rate. Take advantage of the program

The reference design structure separate for the unit length is the 2mm 20 point Solid90 hexahedron unit, altogether 7816 units.In order to cause the analysis computation the result to be more precise, takes initial deletion rate RR0 is 1%, evolution rate ER is 1%.Using arranges the APDL procedure to

Initial design of structure of discrete units of length 2mm 20 knot Solid90 Prism unit, a total of 7,816 units. To make the analysis of the results of a calculation more accurate, take the initial delete RR0 for rates, the evolutionary rate of ER 1%. Prepared by APDL under program calculates differe

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