|Table of Contents|

Nonlinear modal simulation of solenoid valve coil looseness using power spectrum method(PDF)

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

Issue:
2023年06期
Page:
31-37
Research Field:
目次
Publishing date:

Info

Title:
Nonlinear modal simulation of solenoid valve coil looseness using power spectrum method
Author(s):
LIAO Yunlong1; 2;  WU Peipei1; 2;  YOU Gang1; 2
1.Shanghai Institute of Space Propulsion, Shanghai 201112, China; 2.Shanghai Engineering Center of Space Engine, Shanghai 201112, China
Keywords:
nonlinear mode;  power spectral density;  random vibration;  transient dynamics
PACS:
V434
DOI:
-
Abstract:
A nonlinear modal simulation method that combines time-domain transient dynamics simulation with frequency-domain power spectrum analysis was proposed.The simulation process is as follows: first, the periodogram method and probability statistics are used to simulate the random test conditions in the time domain.Combine and verify, obtain the fitting time domain conditions and prove the effectiveness, then use them as input conditions to conduct the transient dynamics simulation of the valve structure, perform the power spectrum conversion on the time domain acceleration result curve, and finally obtain the structural nonlinear modal frequency through the power spectrum analysis. Different from the traditional linear eigenvalue modal simulation principle, the nonlinear modal simulation method completes the nonlinear modal analysis through multiple processes of frequency domain power spectrum conditions-time domain fitting-time domain simulation-frequency domain analysis.The nonlinear effects of contact are introduced in the time domain simulation step.The thread loosening model ofa certain solenoid valve coiluses conservative boundaries for linear modal simulation, and the deviation between simulation results and experimental results is8.96.After the friction coefficient calibration, the nonlinear modal frequency simulation results and experimental deviation considering the nonlinear influence of contact are 0.69.The result is better than linear simulation results.

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