The response of a G4(1S) strong post steel w-beam guardrail system to dynamic impact has been investigated in a series of full-size physical tests and in simulated experiments using LLNL-DYNA3D. The physical tests were conducted at the Federal Outdoor Impact Laboratory (FOIL) at the Turner Fairbank Highway Research Center of the Federal Highway Administration (FHWA) in McLean, Virginia using a pendulum. In the pendulum tests, an 880 kg mass was used to strike the rail perpendicular to its face. The rail section was attached to steel posts and blockouts and supported in a specially designed fixture. Initial velocities of the pendulum at impact were 9.25, 20, 30 and 35 km/h. From acceleration data taken during the testing, acceleration, force, velocity and displacement histories of the impact event were calculated. Data from the LLNL-DYNA3D simulations of the impact tests compared well with the data obtained from the full-scale testing. Animations of the deformed shapes of the rails at 25 msec intervals compared favorably with high speed film images. Force versus displacement histories showed good agreement with those obtained from quasi-static experiments.
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机译：在一系列全尺寸物理测试和使用LLNL-DYNA3D的一系列全尺寸物理测试和模拟实验中，研究了G4（1S）强的钢铁W梁护栏系统对动态冲击的响应。使用摆在弗吉尼亚州的联邦公路管理局（FHWA）的特纳Fairbank公路研究中心的联邦户外影响实验室（箔）进行了物理测试。在摆锤试验中，使用880千克质量垂直于其脸部撞击轨道。轨道部分连接到钢柱和封锁，并在专门设计的夹具中支撑。突击部的初始速度为9.25,20,30和35 km / h。计算在测试，加速，力，速度和速度和位移历史的加速数据进行了计算。来自LLNL-DYNA3D模拟的数据频率与从全尺度测试中获得的数据进行比较。轨道的变形形状的动画与25毫秒间隔有利地与高速胶片图像相比。力与位移历史与从准静态实验中获得的那些吻合良好。
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