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| High-performance method for mooring load computation of helicopter based on parametric variational principle |
| Received:July 25, 2021 Revised:October 08, 2021 |
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| DOI：10.7511/jslx20210725001 |
| KeyWord:helicopter mooring load parametric variational principle convergence nonlinear |
| Author | Institution |
| 张燕辉 |
中国直升机设计研究所, 景德镇 |
| 高强 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
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| Abstract: |
| To ensure the security of the carrier helicopter on a warship,the helicopter must be moored on the deck by using a mooring device.The mooring problem of the helicopter can be simplified to a truss consisting of the helicopter body,the rope and undercarriage.The rope is subject only to tension not compression,while the undercarriage is subject only to compression not tension.This indicates that the mooring problem of the helicopter is strongly nonlinear and the effective numerical algorithms are needed.Based on the parametric variational principle,a high-performance method is proposed to compute the mooring load of the helicopter when the large deformation of the structure is considered.This method can accurately determine the states of tension and compression for rope and undercarriage by using the parametric variational principle,and the material nonlinearity analysis of the mooring system is transformed into a complementary problem.The convergence of the results is greatly improved.Compared with the results of NASTRAN and ABAQUS software packages,the accuracy,convergence and efficiency of the proposed method are verified by numerical examples. |
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