Optimal Design of Absorber for Systems with Uncertain Parameters
碩士 === 國立臺灣科技大學 === 機械工程系 === 99 === The paper presents a method to design parameters in a vibration absorber by minimizing the failure probability of a system. The mass and stiffness of the main system are assumed to be random variables. The normalized amplitude of the main mass for both the classi...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/q6ru56 |
| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 99 === The paper presents a method to design parameters in a vibration absorber by minimizing the failure probability of a system. The mass and stiffness of the main system are assumed to be random variables. The normalized amplitude of the main mass for both the classical and three-element type 2-DOF models are evaluated. Accordingly, three normalized amplitudes of specified frequencies are chosen as performance measurements to find three failure functions. Each failure function corresponds to a probability of failure by using the reliability index. Therefore the union failure probability can be obtained. Finally the optimal parameters of a vibration absorber can be found by mean of the genetic algorithms. The numerical results show that the probability based optimal design is better than that of deterministic based optimal design for a vibration absorber if the main system parameters are random in nature.
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