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由于尖顶等效方形波(tipped equivalent square wave,TESW)具有简单、直观、计算方便等优势,在乘员约束系统开发设计阶段,在保持最大动态变形量C和反弹时刻tm相等的特征下,采取简化的等效方形波TESW拟合实际正面碰撞中的车体减速度。在证明TESW波型质心tc与最大动态变形量C和初始碰撞速度v0相关后,推导了TESW波型3个关键点的坐标公式,从而确定TESW波型并举例计算。对TESW波型进行一次和两次积分分别得到速度和位移的曲线,与实际车体的速度和位移曲线拟合较好。最后分析了TESW波型在碰撞安全设计中的应用。
Due to the advantages of simple, intuitive and convenient computation, the tipped equivalent square wave (TESW) is simplified in the development and design phase of the occupant restraint system while keeping the maximum dynamic deformation C and the rebound moment tm equal The equivalent square wave TESW fits the body deceleration in a real frontal collision. After the correlation between the TcW wave centroid tc and the maximum dynamic deformation C and the initial collision velocity v0 is proved, the coordinate formulas of the three key points of the TESW wave model are deduced to determine the TESW wave patterns and give an example calculation. The curves of velocity and displacement were obtained for one and two integrals of the TESW waveforms, respectively, which were better fitted to the actual vehicle body velocity and displacement curves. Finally, the application of TESW wave in crash safety design is analyzed.