|Table of Contents|

Study on the excess vibration in high frequency region in random vibration test of small fixture(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2019年01期
Page:
73-76
Research Field:
测控与试验
Publishing date:

Info

Title:
Study on the excess vibration in high frequency region in random vibration test of small fixture
Author(s):
XU Hongwei;  MA Xiaoyu;  ZHOU Jian; SONG Shaowei
(Xi'an Aerospace Propulsion Institute, Xi'an 710100, China)
Keywords:
vibration test;  high frequency excess vibration;  fixture
PACS:
V433
DOI:
-
Abstract:
The causes of excess vibration in high frequency region in random vibration test of control cables were analyzed, including vibration test fixture design, numbers of connection screws, connection stiffness, connection nonlinearity and connection damping. In order to solve the excess vibration in high frequency region, the solutions, including reducing the fixture center of gravity, increasing connection stiffness, improving connection damping and multipoint control, were proposed and the control precision and test quality can be improved in random vibration test of small fixture. In addition, the problems encountered in some projects were well explained by this work: 1)the control effect is better in low-order vibration, but the excess vibration in high frequency region occurs in high-order vibration.2)the control effect is utterly different when the vibration tests look like the same in two directions.

References:

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Last Update: 2019-02-20