Drophammer: a machine consisting of an anvil or base aligned with a hammer that is raised and then dropped on molten metal used to forge or stamp the metal resting on the anvil.
落锤：由钻或底座及与之对齐的锤组成的机器，锤被举起后落在融化金属上用于锻造或冲压放在砧板上的金属。
2
The basic principle of simple high strain pile test method transformed from measured free fall of drophammer is given in this paper.
给出测量自由落锤的加速度换算高应变试桩的动力的简易法的基本原理、测试操作与工程应用。
3
This paper describes drophammer hydraulic dynamic calibration device's operating principle and its main function. The problems of the current calibration methods are also studied in details.