【摘要】 以相对穿阈率为评估指标,探讨了强非线性杜芬系统稳态随机振动的等效化问题。结果表明,在不同位移阈值条件下,随着系统振动非线性的增强,立方恢复力等效模型预测精度逐步提高。该等效模型对强非线性杜芬系统具有良好的适用性。更多还原

【Abstract】 According to the relative crossing threshold rate,the equivalent problem of random vibration of strong nonlinear Duffing systems is approached.The results show that the prediction precision of the cubic restoring force equivalent model improves with nonlinearity strengthening of the system vibration for different threshold values of drift.The equivalent model has good applicability for strong nonlinear Duffing systems.更多还原