Academic Journal
Dynamic analysis for rigid-flexible multibody systems with random and interval fields.
| Τίτλος: | Dynamic analysis for rigid-flexible multibody systems with random and interval fields. |
|---|---|
| Alternate Title: | 考虑随机场与区间场的刚柔耦合多体系统动力学分析. (Spanish) |
| Συγγραφείς: | Yanfei, JIN, Jingwei, MENG |
| Πηγή: | Journal of Southeast University (English Edition); Sep2026, Vol. 42 Issue 3, p269-280, 12p |
| Θεματικοί όροι: | Multibody systems, Random fields, Uncertainty (Information theory), Stochastic processes, High-dimensional model representation |
| Abstract (English): | A nonintrusive dynamic response prediction method is proposed to deal with the rigid-flexible multibody systems involving hybrid uncertainties of random and interval fields. The high-dimensional discrete representations of random and interval fields are embedded into the multibody system dynamics modeling based on the absolute nodal coordinate formulation using the Karhunen-Loève expansion and truncation technique, enabling an effective description of spatially correlated uncertain parameters. To overcome the challenges induced by high-dimensional uncertain variables and long-time domain analysis, the local mean decomposition and high-dimensional model representation are applied to construct a nonintrusive surrogate model for the system dynamic response. The proposed approach improves prediction accuracy while considerably reducing computational cost and enhancing the efficiency of evaluating response statistics and boundary characteristics. The effectiveness and applicability of the proposed method are validated through two numerical examples of typical multibody systems involving one- and two-dimensional random-interval fields in handling spatial uncertainties and predicting system response ranges. [ABSTRACT FROM AUTHOR] |
| Abstract (Spanish): | 针对刚柔耦合多体系统中包含随机场和区间场的混合不确定性问题, 本文提出了一种非侵入式动态 响应预测方法。通过使用Karhunen-Loève展开及截断技术, 将随机场与区间场的高维离散表示嵌入基于绝 对节点坐标法的多体系统动力学建模中, 实现了对空间相关不确定性参数的有效描述。在此基础上, 为应 对高维不确定变量和长时域分析带来的挑战, 结合局域均值分解与高维模型表征方法, 构建了系统动态响 应的非侵入式代理模型。该方法在提高预测精度的同时, 显著降低了计算成本, 提高了响应统计量与边界 特征的求解效率。通过一维与二维随机场-区间场作用下的典型多体系统数值算例, 验证了所提方法在处 理空间相关不确定性、预测系统响应范围等方面的有效性与适用性. [ABSTRACT FROM AUTHOR] |
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| Βάση Δεδομένων: | Complementary Index |
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