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首页> 外文期刊>SAE International Journal of Passenger Cars - Mechanical Systems >Comparison of Quasistatic Bumper Testing and Dynamic Full Vehicle Testing for Reconstructing Low Speed Collisions
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Comparison of Quasistatic Bumper Testing and Dynamic Full Vehicle Testing for Reconstructing Low Speed Collisions

机译：准静态保险杠测试与动态整车测试重构低速碰撞的比较

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It has been proposed that low speed collisions in which the damage is isolated to the bumper systems can be reconstructed using data from customized quasistatic testing of the bumper systems of the involved vehicles. In this study, 10 quasistatic bumper tests were conducted on 7 vehicle pairs involved in front-to-rear collisions. The data from the quasistatic bumper tests were used to predict peak bumper force, vehicle accelerations, velocity changes, dynamic combined crush, restitution, and crash pulse time for a given impact velocity. These predictions were compared to the results measured by vehicle accelerometers in 12 dynamic crash tests at impact velocities of 2 - 10 mph. The average differences between the predictions using the quasistatic bumper data and the dynamic crash test accelerometer data were within 5% for bumper force, peak acceleration, and velocity change, indicating that the quasistatic bumper testing method had no systematic bias compared to dynamic crash testing. The root mean square differences were 21% - 23% for peak vehicle accelerations and 12% for vehicle velocity changes. The root mean square differences when comparing crash test accelerometer data from one vehicle to the other using Newton's second law and assuming the vehicles to be rigid bodies were 11% - 18% for all parameters. We conclude that quasistatic bumper testing is an effective tool for reconstructing low speed collisions because it replicates the results of dynamic full vehicle crash testing with good accuracy.
机译：已经提出，可以使用来自涉及车辆的保险杠系统的定制准静态测试的数据来重建其中隔离到保险杠系统的损害的低速碰撞。在这项研究中，对涉及前后碰撞的7对车辆进行了10次准静态保险杠测试。准静态保险杠测试的数据用于预测给定冲击速度下的峰值保险杠力，车辆加速度，速度变化，动态组合挤压，恢复和碰撞脉冲时间。将这些预测结果与车辆加速度计在12-10 mph的撞击速度下进行的12次动态碰撞测试中测得的结果进行了比较。使用准静态保险杠数据和动态碰撞试验加速度计数据得出的预测结果之间的平均差在5％以内，保险杠力，峰值加速度和速度变化均在5％之内，这表明准静态保险杠测试方法与动态碰撞测试相比没有系统偏差。车辆加速度峰值的均方根差为21％-23％，车速变化的均方根差为12％。使用牛顿第二定律比较一辆车与另一辆车的碰撞测试加速度计数据时的均方根差，并假设所有参数的车辆均为刚体，则均为11％-18％。我们得出的结论是，准静态保险杠测试是重构低速碰撞的有效工具，因为它以良好的精度复制了动态全车碰撞测试的结果。

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