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A dynamic tree sway model

机译:动态树摇摆模型

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摘要

The proposed anisotropic, mathematical model can be used to simulate the sway of a Scots pinetree resulting from a tree-pulling test in the direction of the pulling force to a reasonable degree.However, under real wind conditions the model's ability to simulate the dynamics of wind-induced tree vibrations is limited. Possible sources of the model's simulative inability arise fromsporadic decoupling of the tree response from near-surface airflow, effects of cross-coupling ofthe two horizontal displacement components, changes in instantaneous wind load frequency andtree response frequency, and the insufficient description of the acting wind load.
机译:所提出的各向异性数学模型可以用来模拟由拔树试验引起的苏格兰松树在合理的拉力方向上的摇摆。但是,在实际风条件下,该模型能够模拟松树的动态。风引起的树木振动是有限的。该模型无法模拟的原因可能是由于树木响应与近地气流的偶发解耦,两个水平位移分量的交叉耦合的影响,瞬时风荷载频率和树响应频率的变化以及对活动风荷载的描述不足。

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