本试验旨在确定零部件承受随机振动施加的动态应力的能力，随机振动施加在频率上限和下限之间，以模拟各种服务现场环境中经历的振动。随机振动是导弹、大推力喷气式飞机和火箭发动机产生的现代野外环境的特征。在这些类型的环境中，随机振动提供了更真实的测试。然而，出于设计目的，扫频正弦测试可能会产生更相关的设计信息。

This test is conducted for the purpose of determining the ability of component parts to withstand the dynamic stress exerted by random vibration applied between upper and lower frequency limits to simulate the vibration experienced in various service field environments. Random vibration is characteristic of modern field environments produced by missiles, high-thrust jets and rocket engines. In these types of environments, the random vibration provides a more realistic test. For design purposes, however, a swept frequency sinusoidal test may yield more pertinent design information.