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| Motion Reliability Analysis of Pin Puller Mechanism Based on Uncertainty |
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| DOI：10.7643/issn.1672-9242.2022.12.003 |
| KeyWord:pin puller reliability analysis Kriging model sensitivity uncertainty |
| Author | Institution |
| YANG Kun |
Shaanxi Applied Physical-Chemistry Institute, Xi'an , China |
| CHENG Tao |
Shaanxi Applied Physical-Chemistry Institute, Xi'an , China |
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| Abstract: |
| The work aims to study the effects of random variables on the reliability in the working process of pin puller and propose a modeling and analysis method for the motion reliability of the pin puller mechanism based on uncertainty, so as to realize the quantitative analysis and efficient and accurate evaluation of the pin puller reliability. Firstly, based on the stress-strength model and mechanism motion failure mode of the pin puller, the limit state equation was established. Then, considering the effects of uncertainty factors in the working process, a reliability analysis method of mechanism motion based on Kriging surrogate model to approximate the limit state equation was proposed, and the efficient reliability analysis of the mechanism motion of the pin puller was carried out. Finally, the reliability sensitivity analysis was conducted to the random variables in the mechanism motion of the pin puller to determine the effects of the random variables on the motion reliability of the pin puller mechanism, which provided the direction for the optimization design. The motion reliability of pin puller mechanism was more than 0.999 9, meeting the design requirements. The diameter of shear pin d was the biggest factor affecting the startup reliability of pin puller piston, followed by A, f, ρ,etc. The biggest factor affecting the reliability of piston motion was A, followed by f, ρ. This method can accurately describe the effects of uncertainty factors on the motion of the pin puller mechanism, improve the accuracy and efficiency of the quantitative analysis of mechanism motion reliability, and provide support for the fine design of the pin puller. |
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