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主要介绍了触发器的设计和性能。为了分析撞击型触发器的几何特征对于轴向冲击荷载作用下耗能构件的抗挤压性能的影响,对其进行数值分析。该耗能构件由一个平盖加一个帽形顶部剖面构成。将触发器视为一个在帽形剖面上具有半圆形横截面的突起物,采用有限元软件LS-DYNA模拟所有的挤压作用。结果显示:在挤压力峰值和轴向冲击荷载作用下的构件耗能能力上,触发器的引入非常有效。同时发现,通过改变触发器的位置和几何尺寸,可以控制构件的挤压响应。
Mainly introduces the design and performance of the trigger. In order to analyze the impact of the geometric characteristics of the impact trigger on the anti-extrusion performance of energy-dissipating components under axial impact loading, numerical analysis is carried out. The energy dissipating member consists of a flat cap plus a hat-shaped top profile. The trigger was considered as a protrusion with a semicircular cross-section on the hat section, and all the extrusion was modeled using the finite element software LS-DYNA. The results show that the introduction of trigger is very effective in the energy dissipation capacity of components under the peak of extrusion pressure and axial impact load. It is also found that by changing the position and geometry of the trigger, the squeeze response of the component can be controlled.