Abstract
Ships are subject to excitation from the external environment when sailing, especially explosive shocks are likely to damage important parts of the ship. Marine dampers are generally composed of multiple elements, and their hysteresis exhibits asymmetric, nonlinear characteristics in the shock environment, which makes it difficult to describe them well using the classical Bouc-Wen model. For the hysteresis characteristics of marine dampers in shock environment, a modified Bouc-Wen model is proposed. In addition, in order to reduce the difficulty of parameters identification and to improve the speed and stability of identification, a set of identification processes incorporating genetic algorithm corresponding to the proposed improved model is presented. The model has a simple parameters identification process and can capture the hysteresis characteristics of marine dampers more accurately, which is helpful for the dynamics study of dampers. On this basis, the model parameters at different shock energies are given. The study shows that the proposed modified Bouc-Wen model can effectively model the hysteresis of marine dampers in both dynamic and shock environments. Especially in the shock environment, the accuracy of hysteresis modeling of the proposed model is significantly improved compared to the classical model, with an accuracy improvement of 78.8% at the highest.
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© 2024 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
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Zhou, Y., Wang, D., Qiu, Z., Chen, K., Chen, W., Zhu, R. (2024). Study of Hysteresis Characteristics of Marine Dampers Under Shock Environment. In: Rui, X., Liu, C. (eds) Proceedings of the 2nd International Conference on Mechanical System Dynamics. ICMSD 2023. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-99-8048-2_143
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DOI: https://doi.org/10.1007/978-981-99-8048-2_143
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