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| The influence of structural mass on optimization effect of rational criterion methods |
| Received:October 09, 2013 Revised:December 02, 2013 |
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| DOI：10.7511/jslx201501006 |
| KeyWord:structural optimization rational criterion Virtual work method Guide-weight method Lagrange condition,Influence of mass |
| Author | Institution |
| 陈树勋 |
广西大学 机械工程学院, 南宁 |
| 韦齐峰 |
广西大学 机械工程学院, 南宁 ;广西大学 土木建筑工程学院, 南宁 |
| 黄锦成 |
广西大学 机械工程学院, 南宁 |
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| Abstract: |
| Structural mass plays two ambivalent roles in structural optimization:As design resource,mass can improve structural performances; On the other hand,as structural load,mass may make structural performances bad.Criteria equation group of virtual work method has ignored derivatives of structural load to design variables,cannot consider the other hand of ambivalent roles of structural mass.For aircraft,spacecraft,high-speed train,high-precision antenna etc.,whose structural main load are structural weight or inertial load,the result obtained through Virtual Work method are far away from the optimum solution.In Guide-weight method,the criteria equation groups of are strictly deduced,the limitation of Virtual Work method has been overcome,and its optimization result is improved greatly.But for some simple trusses composed by 3 bars or 5 bars,the result obtained through Virtual Work method is the same as the result obtained through Guide-weight method.According to Lagrange condition,this enigmatic problem is explained.The condition,that the result of Virtual Work method is the same as the result of Guide-weight method,is firstly presented.For rational criterion methods of structural optimization and its engineering applications,the study has important academic and practical value. |
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