基于机械导纳理论的方钢结构减振特性

Vibration compression of quadrate steel beams using mechanical mobility method

应用机械导纳理论,推导了布设方钢的无限板在点激励作用下的振动响应方程,通过数值计算研究了不同的方钢布设方式对减振效果的影响。结果表明,单级方钢或多级平行方钢平板结构目标区的振动级落差随距振源距离的增大逐渐减小,远离振源靠近对称轴附近的目标区的振动有所放大;不平行方钢改变了平板振动对称分布的特性,改变方钢的不平行度可提高减振效果。

The vibration response equation of is derived using mechanical mobility method. vibration are investigated by numerical calcul target area decrease with the increase in the an infinite plate with quadrate steel beams under point force load The effects of different layouts of quadrate steel beams on plate ation. The results show that the vibration level difference of the distance from the load to the target area; the vibration of the target area that is far from the load and near the symmetry axis is amplified for plate with single quadrate beam or several parallel quadrate beams. The symmetrical characteristic of the vibration distribution in infinite plate is remodeled by several non-parallel quadrate beams. The vibration suppression capacity is enhanced by increasing the angle between quadrate beams.