关于摆锤式冲击弯曲试验冲击载荷精确测定的研究

摘要

A method of accurate measuring impact force based on stress wave propagation phenomena is proposed here. The measurement of load-time curve is gained by modifying the pendulum-type impact test machine. Then a relatively high accuracy impact force is obtained according to the principle of progressive integral solution,with the transfer function gained from calibration test and application of Fourier transform and inverse transform. At the same time the usefulness of this method in measuring dynamic load of both high and low strength materials is tested and verified by the examples.%提出一种考虑到应力波传播现象的比较精确测定冲击力的方法.即通过改装摆锤式冲击试验机,实现冲击载荷-时间曲线测定,然后利用叠加积分求解的原理,在通过校正实验获得传递函数之后,再运用傅里叶变换和逆变换,求得精确度比较高的冲击力.同时通过实例验证了这一方法在高、低硬度材料动载荷测定中的有效性.