【摘要】 根据在离散时间间隔内未知外载荷按线性变化的这一更为合理的假定,给出了比例阻尼系统的一种改进的载荷时域识别方法。即若已知结构的任一种响应:位移、速度或加速度,根据本文推导出的递推连锁计算公式便可确定未知作用力的时程。算例表明,本方法简便、有效,且具有较强的抗噪能力。更多还原

【Abstract】 Based on more reasonable assumption that unknown external forces vary linearly within the discrete time interval, an improved method for dynamic load identification for proportional damping system was presented. A set of concise recursive formulae for determining the values of these forces was derived, any one of structural response: displacement, velocity or acceleration needed only for the input. Practical examples showed that compared with other formulae given in recent literature, the proposed approach is simple, effective and has a strong anti-noise ability.更多还原