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Vibration Damping Design and Testing Research of Space Payload Cabinet

机译:空间有效载荷柜减振设计与试验研究

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摘要

Space payloads which installed on spacecraft such as satellites and airships are usually experienced random vibrations and low-frequency sinusoidal vibrations during launching. In this paper, a space payload cabinet is introduced, and the damping design is carried out by applying constrained viscoelastic damping layer to the surfaces of the cabinet to ensure that the space payloads can withstand the above-mentioned mechanical environmental conditions. A reliable connection between the space payload cabinet and the shaking table is achieved through the vibration test fixture. The basic requirements for the function and design of the vibration test fixture are presented. A method for detecting the dynamic characteristics of the fixture is proposed. The vibration characteristic of the space payload cabinet is simulated with the finite element software MSC.Nastran. Then the vibration test of the cabinet is conducted and the vibration response data is acquired by using the B&K test system. The test results show that the damping effect of the space payload cabinet is obvious after applying the viscoelastic constrained damping layer.
机译:安装在卫星和飞艇等航天器上的空间有效载荷在发射过程中通常会受到随机振动和低频正弦振动的影响。本文介绍了一种空间有效载荷柜,并通过在其表面上施加约束粘弹性阻尼层来进行阻尼设计,以确保空间有效载荷能够承受上述机械环境条件。通过振动测试夹具,可以在空间有效载荷柜和振动台之间建立可靠的连接。提出了振动测试夹具的功能和设计的基本要求。提出了一种检测夹具动态特性的方法。用有限元软件MSC.Nastran模拟了空间有效载荷柜的振动特性。然后进行机柜的振动测试,并通过B&K测试系统获取振动响应数据。试验结果表明,在施加粘弹性约束阻尼层后,空间有效载荷柜的阻尼效果明显。

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