一、问题的提出卫星、导弹在发射和飞行过程中所处的环境条件对星弹电子设备的可靠性影响极大。由于现代航天技术的迅速发展,火箭的推力和速度都有很大的提高,因而产生了强烈的宽带随机振动和噪声。这样的振源将激发起飞行器结构及其电子设备的许多共振峰,共振响应将使设备失效,结构破坏。同时,当火箭发动机的燃烧室排气时,由于极高速的气体粒子和周围的低速气体粒子之间发生湍流混和,使大气的稳定状态发生巨大的扰动,因而产生了强烈的 I. PROBLEM PROBLEMS The environmental conditions in which satellites and missiles launch and fly have a great impact on the reliability of satellite-bouncing electronic equipment. Due to the rapid development of modern space technology, the thrust and speed of the rockets have greatly improved, resulting in strong random vibration and noise broadband. Such a source of vibration will excite many formants of the aircraft structure and its electronics, and the resonant response will disable the device and destroy the structure. At the same time, when the rocket engine’s combustion chamber is vented, turbulent mixing occurs between very high velocity gas particles and the surrounding low velocity gas particles, causing a large disturbance in the steady state of the atmosphere, resulting in a strong