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首页> 外文会议>AHS 59th Annual Forum Proceedings Vol.1 May 6-8, 2003 Phoenix, Arizona >Comparisons of the Impact Responses of a 1/5-Scale Model and a Full-Scale Crashworthy Composite Fuselage Section
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Comparisons of the Impact Responses of a 1/5-Scale Model and a Full-Scale Crashworthy Composite Fuselage Section

机译：1/5比例模型和全尺寸可撞复合机身部分的撞击响应比较

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摘要

A 25-fps vertical drop test of a 1/5-scale model composite fuselage section was conducted to replicate a previous test of a full-scale fuselage section. The purpose of the test was to obtain experimental data characterizing the impact response of the 1/5-scale model fuselage section for comparison with the corresponding full-scale data. This comparison is performed to assess the scaling procedures and to determine if scaling effects are present. For the drop test, the 1/5-scale model fuselage section was configured in a similar manner as the full-scale section, with lead masses attached to the floor through simulated seat rails. Scaled acceleration and velocity responses are compared and a general assessment of structural damage is made. To further quantify the data correlation, comparisons of the average acceleration data are made as a function of floor location and longitudinal position. Also, the percentage differences in the velocity change (area under the acceleration curve) and the velocity change squared (proportional to kinetic energy) are compared as a function of floor location. Finally, correlation coefficients are calculated for corresponding 1/5- and full-scale data channels and these values are plotted versus floor location. From a scaling perspective, the differences between the 1/5- and full-scale tests are relatively small, indicating that appropriate scaling procedures were used in fabricating the test specimens and in conducting the experiments. The small differences in the scaled test data are attributed to minor scaling anomalies in mass, potential energy, and impact attitude.
机译：进行了1/5比例模型复合机身部分的25 fps垂直跌落测试，以复制以前对全尺寸机身部分的测试。该测试的目的是获得表征1/5比例模型机身截面冲击响应的实验数据，以便与相应的全比例数据进行比较。执行此比较以评估缩放过程并确定是否存在缩放效果。对于跌落测试，以与全尺寸部分相似的方式配置1/5比例模型机身部分，并通过模拟的座椅导轨将铅块连接到地板上。比较了按比例缩放的加速度和速度响应，并对结构损伤进行了总体评估。为了进一步量化数据相关性，根据地面位置和纵向位置对平均加速度数据进行比较。同样，将速度变化（加速度曲线下的面积）和速度变化平方（与动能成比例）的百分比差异作为地面位置的函数进行比较。最后，为相应的1/5和全比例数据通道计算相关系数，并绘制这些值与地板位置的关系。从比例缩放的角度来看，1/5和全尺寸测试之间的差异相对较小，这表明在制造试样和进行实验时使用了适当的比例缩放程序。缩放后的测试数据中的细微差异归因于质量，势能和撞击姿态方面的较小缩放异常。

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