基于Abaqus的等边三角形网格加筋壳建模分析方法及试验验证研究
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摘要
为获取高精度的网格加筋壳的有限元计算模型,首先梳理了这种网格现有有限元建模方面的研究,然后提出了基于Abaqus壳模型高精度建模方法。最后以新型中型运载火箭某贮箱为例,建立了等边三角形网格加筋壳为箱体的全模型,并进行试验预示。通过对比试验和预示结果,计算的破坏形式破坏位置与试验相符,破坏载荷相差仅1.8%,充分验证了这种建模方法的正确性。
The isogrid stiffened shell has the characteristics of isotropic and high specific stiffness, and has been widely used in shell design of launch vehicle. The existing finite element modeling of isogrid is studied at first. Then a high-precision modeling method based on Abaqus is proposed. Finally, taking a certain tank of new generation medium-sized launch vehicle as an example, the full model of with isogrid stiffened shell is established, and the test is predicted. Moreover, the calculated failure mode and location are consistent with the test, and the difference of failure load between them is only 1.8%. The method of modeling is fully verified by the test.
The isogrid stiffened shell has the characteristics of isotropic and high specific stiffness, and has been widely used in shell design of launch vehicle. The existing finite element modeling of isogrid is studied at first. Then a high-precision modeling method based on Abaqus is proposed. Finally, taking a certain tank of new generation medium-sized launch vehicle as an example, the full model of with isogrid stiffened shell is established, and the test is predicted. Moreover, the calculated failure mode and location are consistent with the test, and the difference of failure load between them is only 1.8%. The method of modeling is fully verified by the test.
引文
[1]Mc Donnell Douglas Astronautics Company.NASA contractor report[R].NASA-CR-124075,Isogrid Design Handbook,1973.
[2]鲁宇.中国运载火箭技术发展[J].宇航总体技术,2017,1(3):1-8.Lu Yu.Space lauch vehicle’s development in China[J].Astronautical Systems Engineering Technology,2017,1(3):1-8.
[3]范瑞祥,等.等边三角形网格加筋壳轴压承载研究[J].强度与环境,2014,41(4):33-40.Fan Ruixiang,et al.Research on stability and critical load of isogrid stiffened cylinder under axial compression[J].Structure&Environment Engineering,2014,41(4):33-40.
[4]Lovejoy A E,Hilburger M W.Design of 8-ft-diameter barrel test article attachment rings for shell buckling knockdown factor project[R].NASATM-2010-216839,2010.
[5]Quinn D,Murphy A,Mc Ewan W,Lemaitre F.Stiffened panel stability behaviour and performance gains with plate prismatic sub-stiffening[J].Thin-Walled Structures,2009,47(12):1457-1468.
[6]Hao P,Wang B,Li G,Meng Z,Wang L.Hybrid framework for reliability-based design optimization of imperfect stiffened shells[J].AIAAJournal,2015,53(10):2878-2889.
[7]Hao P,Wang B,Tian K,Li G,Du KF,Niu F.Efficient optimization of cylindrical stiffened shells with reinforced cutouts by curvilinear stiffeners[J].AIAA Journal,2016,54(4):1350-1363.
[8]Hao P,Wang B,Tian K,Li G,Sun Y,Zhou C X.Fast procedure for non-uniform optimum design of stiffened shells under buckling constraint[J].Structural and Multidisciplinary Optimization,2017,55(4):1503-1516.
[9]王博,等.一种壁板焊接机械铣三角形网格加筋结构快速有限元建模方法:中国,CN106997405A[P].2017-08-01.Wang Bo,et al.A fast finite element modeling method for wall plate welding mechanical milling isogrid shell structure:China,CN106997405A[P].2017-08-01.
[10]徐卫秀,等.动力学求解薄壁网格加筋壳稳定性技术研究[J].导弹与航天运载技术,2014,322(3):38-43.Xu Weixiu,et al.Research on buckling analysis of thin-walled grid-stiffened shells using dynamic FEM[J].Missiles and Space Vehicles,2014,322(3):38-43.
[2]鲁宇.中国运载火箭技术发展[J].宇航总体技术,2017,1(3):1-8.Lu Yu.Space lauch vehicle’s development in China[J].Astronautical Systems Engineering Technology,2017,1(3):1-8.
[3]范瑞祥,等.等边三角形网格加筋壳轴压承载研究[J].强度与环境,2014,41(4):33-40.Fan Ruixiang,et al.Research on stability and critical load of isogrid stiffened cylinder under axial compression[J].Structure&Environment Engineering,2014,41(4):33-40.
[4]Lovejoy A E,Hilburger M W.Design of 8-ft-diameter barrel test article attachment rings for shell buckling knockdown factor project[R].NASATM-2010-216839,2010.
[5]Quinn D,Murphy A,Mc Ewan W,Lemaitre F.Stiffened panel stability behaviour and performance gains with plate prismatic sub-stiffening[J].Thin-Walled Structures,2009,47(12):1457-1468.
[6]Hao P,Wang B,Li G,Meng Z,Wang L.Hybrid framework for reliability-based design optimization of imperfect stiffened shells[J].AIAAJournal,2015,53(10):2878-2889.
[7]Hao P,Wang B,Tian K,Li G,Du KF,Niu F.Efficient optimization of cylindrical stiffened shells with reinforced cutouts by curvilinear stiffeners[J].AIAA Journal,2016,54(4):1350-1363.
[8]Hao P,Wang B,Tian K,Li G,Sun Y,Zhou C X.Fast procedure for non-uniform optimum design of stiffened shells under buckling constraint[J].Structural and Multidisciplinary Optimization,2017,55(4):1503-1516.
[9]王博,等.一种壁板焊接机械铣三角形网格加筋结构快速有限元建模方法:中国,CN106997405A[P].2017-08-01.Wang Bo,et al.A fast finite element modeling method for wall plate welding mechanical milling isogrid shell structure:China,CN106997405A[P].2017-08-01.
[10]徐卫秀,等.动力学求解薄壁网格加筋壳稳定性技术研究[J].导弹与航天运载技术,2014,322(3):38-43.Xu Weixiu,et al.Research on buckling analysis of thin-walled grid-stiffened shells using dynamic FEM[J].Missiles and Space Vehicles,2014,322(3):38-43.