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遗传算法在分段等截面两端固定吊杆拉力测定中的应用

Keywords: 桥梁工程,拉力测定,遗传算法,分段吊杆,固有频率,对分法

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Abstract:

吊杆拉力测定中,分段等截面且两端固定的吊杆的抗弯刚度和质量密度往往不能准确获得,对此,提出了利用遗传算法的吊杆拉力识别方法。利用两段等截面且两端固定的吊杆在轴向拉力作用下的横向振动微分方程,根据边界条件和连续条件,得到轴向拉力与两段吊杆的抗弯刚度、长度、线密度及振动频率之间的超越方程关系。将吊杆抗弯刚度、线密度及拉力作为变量,通过测量的吊杆固有频率并利用对分法和遗传算法对某钢筋混凝土桥的不同张紧程度、不同长度的吊杆拉力进行了计算分析,结果表明该方法是可行的,并且可以满足桥梁施工控制的需要。

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