防鸟刺针刺长度选择方法

The selection method of the length of the bird thorn

防鸟刺可以防止鸟落在针刺上的原理是防鸟刺一般为弹性体材料,在自身重力、鸟类重力、起飞或降落的作用下只发生弹性变形。目前,关于鸟类起飞或降落时对支撑物作用力的研究较少,因此本文设计作用力试验装置,进行家鸽在起飞和降落时对支撑物作用力的研究。研究结果表明,家鸽在起飞时对支撑物的作用力呈正态分布,在降落时的作用力呈对数正态分布;家鸽起飞和降落时对支撑物的最大作用力几乎不超过鸟类自身体重的4.6倍和3.8倍。由于未选用野生鸟类,试验结果可能不具通用性,实际使用中建议设计户外测试装置,以增加试验结果可靠性。最后,针对不同针刺材料、长度和直径进行试验,并给出选型建议。

The principle that the bird thorn can prevent birds from falling on it is that the bird thorn is generally made of elastic material,and only elastic deformation occurs under the action of its own gravity,bird gravity,takeoff or landing.There are few studies on the action of birds on the support during takeoff or landing.Therefore,this paper designs a test device to study the action of domestic pigeons on the support during takeoff and landing.The results show that the force exerted by the pigeon on the support during takeoff is normal distribution,and the force exerted by the pigeon on the support during landing is lognormal distribution.The maximum force exerted by the domestic pigeon on the support during takeoff and landing is almost 4.6 times and 3.8 times of the bird’s own weight.Since no wild birds are selected,the test results may not be universal.In actual application,it is recommended to design an outdoor test device to increase the reliability of the test results.Then,tests are carried out for different thorn materials lengths and diameters,and suggestions for type selection are given.