为探究差异化的构形参数对复合材料波纹梁吸能性能影响，针对多种构形波纹梁，进行动态压溃试验，对试验现象分析及试验数据处理，给出了多种构形波纹梁的载荷-时间曲线和破坏模式。采用有限元软件（ABAQUS）模拟波纹梁的瞬态冲击过程，得到吸能特性参数比吸能(SEA)和平均载荷值等，并与试验结果对比，对比结果验证了数值模型的有效性。通过试验及数值分析结果讨论了波纹构形对波纹梁峰值载荷和吸能能力的影响，对不同构形波纹梁以及增加薄弱环节设计的吸能差异作出评估，为实际工程设计提供参考依据。结果表明，利用等截面剖面杆轴向压缩载荷作用下的临界应力方程将波纹梁梁高/波幅比、波长/波幅比设定在相应关系式时波纹梁结构表现出较为稳定的压溃过程，具有一定的应用价值；波纹腹板圆角R值除了对峰值载荷及平均载荷有影响，对波纹梁破坏模式改变也有一定关系，薄弱圆角r值能比较好的改善峰值载荷大小。
Abstract
In order to explore influence of different configuration parameters on a energy absorption performance of composite corrugated beams, the dynamic collapse tests were carried out for various configurations of corrugated beams, and the load-time curves and failure modes of various configurations of corrugated beams were given by analyzing the test phenomena and processing the test data. The transient impact process of the corrugated beam was simulated by the finite element software (ABAQUS), and the specific energy absorption (SEA) and the average load value were obtained, which were compared with the experimental results to verify the validity of the numerical model. Based on the experimental and numerical analysis results, the influence of the corrugated configuration on the peak load and energy absorption capacity of the corrugated beam is discussed, and the difference of energy absorption between different corrugated beams and the design of adding weak links is evaluated, which provides a reference for practical engineering design.The results indicate that when the critical stress equation of the corrugated beam under axial compressive load is used to set the height/amplitude ratio and wavelength/amplitude ratio of the corrugated beam in the corresponding relationship, the corrugated beam structure exhibits a relatively stable crushing process, which has certain application value;The R value of the corrugated web fillet not only affects the peak load and average load, but also has a certain relationship with the change of the failure mode of the corrugated beam. The R value of the weak fillet can better improve the peak load.
关键词
抗坠毁 /
波纹梁 /
波纹腹板 /
数值模拟 /
Hashin /
吸能
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Key words
Crashworthiness /
Waved beams /
Waved webs /
Numerical simulation /
Hashin /
energy-absorbing
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