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| An error reduction method based on the least squares method for inverse computation of boundary loads of engineering structures |
| Received:June 29, 2019 Revised:November 11, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20190629001 |
| KeyWord:finite element method the least squares method error boundary loads computation |
| Author | Institution |
| 李玉良 |
东华大学 机械工程学院, 上海 |
| 何宇轩 |
中国航发沈阳发动机设计所, 沈阳 |
| 楚盖 |
东华大学 机械工程学院, 上海 |
| 韩亮亮 |
上海宇航系统工程研究所, 上海 |
| 陈萌 |
上海宇航系统工程研究所, 上海 |
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| Abstract: |
| In order to determine the stress and fatigue life of engineering structures,it is necessary to know the accurate boundary loads of structures.However,due to the difficulties in constructing precise resistance models for cutting and shoveling of soil,sand and other working media,and the accurate friction forces and other losses in the power transmission process of mechanical equipment are not easy to obtain.It is difficult to determine the accurate boundary loads of working structures.In this paper,after separating a local structure from the complex one,the relationships between local structure strains and its boundary loads are established using the finite element method based on the Saint-Venant principle.The source and scope of errors in the inverse boundary loads computing process are analyzed and estimated.An error reduction method for the inverse computation of local structure boundary loads is presented using the least-squares method.The effectiveness of the proposed method is verified by the inverse computing of boundary loads of the beam separated from the working structure of a bulldozer. |
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