The construction and comparison of damage detection index based on the nonlinear output frequency response function and experimental analysis

Mao, Hanling; Tang, Weibing; Huang, Yang; Yuan, Dahai; Huang, Zhenfeng; Li, Xinxin; Zheng, Weixue; Ma, Shaohua

doi:10.1016/j.jsv.2018.04.028

Cited by 30 publications

(20 citation statements)

References 13 publications

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“…The concept of NOFRFs was proposed by Lang and Billings [28] and has been applied to solve many engineering problems by researchers [29][30][31][32]. For example, the NOFRFs have been applied to structural damage diagnosis and nonlinear system engineering [33][34][35]. Each order of NOFRFs is a one-dimensional frequency function and can be easily displayed and analyzed.…”

Section: Introductionmentioning

confidence: 99%

Dynamics Analysis of Active Variable Stiffness Vibration Isolator for Whole-Spacecraft Systems Based on Nonlinear Output Frequency Response Functions

Zhang

Zhu

et al. 2020

Acta Mech. Solida Sin.

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In order to improve the harsh dynamic environment experienced by heavy rockets during different external excitations, this study presents a novel active variable stiffness vibration isolator (AVS-VI) used as the vibration isolation device to reduce excessive vibration of the whole-spacecraft isolation system. The AVS-VI is composed of horizontal stiffness spring, positive stiffness spring, parallelogram linkage mechanism, piezoelectric actuator, acceleration sensor, viscoelastic damping, and PID active controller. Based on the AVS-VI, the generalized vibration transmissibility determined by the nonlinear output frequency response functions and the energy absorption rate is applied to analyze the isolation performance of the whole-spacecraft system with AVS-VI. The AVS-VI can conduct adaptive vibration suppression with variable stiffness to the whole-spacecraft system, and the analysis results indicate that the AVS-VI is effective in reducing the extravagant vibration of the whole-spacecraft system, where the vibration isolation is decreased up to above 65% under different acceleration excitations. Finally, different parameters of AVS-VI are considered to optimize the whole-spacecraft system based on the generalized vibration transmissibility and the energy absorption rate.

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Section: Introductionmentioning

confidence: 99%

Dynamics Analysis of Active Variable Stiffness Vibration Isolator for Whole-Spacecraft Systems Based on Nonlinear Output Frequency Response Functions

Zhang

Zhu

et al. 2020

Acta Mech. Solida Sin.

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“…For the vibration-based method, which was firstly developed in bridge engineering, delamination is detected by measuring the changes in dynamic characteristics or dynamic response of the system, such as natural frequency, mode shapes, mode shape curvature, waveform chain code, and signature assurance criteria [17][18][19][20][21][22][23][24]. Memari et al [25] developed kinematic-based models to predict earthquakeinduce failure of the SSGS.…”

Section: Introductionmentioning

confidence: 99%

Sealant Delamination Detection of Structural Sealant Glazing Systems Based on Driving-Point Accelerance

Pan

Jiang

Zhang

et al. 2020

Shock and Vibration

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The structural sealant glazing system is widely used in glass curtain wall worldwide. However, due to the aging of the sealants, cracking may form along the sides of the glass. If the panel of curtain wall arises, delamination may occur and induce failure or loss of the system. In order to detect the delamination of the sealant, in this paper, a new vibration-based damage identification method is proposed by using the difference between the predamage and postdamage driving-point accelerance (DA). This detection method would require only one acceleration sensor on a glass panel and a rubber hammer, which operates very conveniently. When the rubber hammer taps the glass panel near the acceleration sensor, the glass curtain wall panel would generate acceleration response which can be measured by the acceleration sensor. The measured acceleration responses will be used to calculate the DA and lead to a new delamination index, called relative accumulative difference of DA, which will give indications on the potential delamination of the sealant. In addition, the influence of the acceleration sensor installation position was analysed by the finite element method, and the optimal sensor location was determined to be at the intersection of the long-side quarter and the short-side quarter. Nine cases on various delamination severities were identified by the new method, as well as the natural frequency reduction and modal assurance criterion. The laboratory experiments showed that the relative accumulative difference of DA is extremely sensitive to sealant delamination. Even if delamination severity was only 6.39%, the relative accumulative difference of DA would be larger than 18%. As the delamination of the sealant progresses, the relative accumulative difference of DA increases, resulting in an effective detection method for sealant delamination of the structural sealant glazing system. The fundamental frequency reduction is suitable to identify relatively large delamination, and the modal assurance criterion of higher modes is also sensitive to sealant delamination.

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“…e results show that the method can effectively detect the accumulated fatigue damage of used parts. Under the development of nonlinear output frequency response functions, researchers have begun to focus on relevant indexes based on NOFRFs [26,27]. Peng et al [26] proposed a method based on NOFRFs related index Fe.…”

Section: Introductionmentioning

confidence: 99%

“…Comparing with the index of nondamaged test pieces, the results reveal that the newly proposed method can be used to detect fatigue accumulation damage of used parts. Mao et al [27] proposed a nonlinear scale index NL and a divergence index NDI based on the basis of NOFRFs. e experimental results show that these indexes can well identify the morphology and extent of microcracks before they appear.…”

Section: Introductionmentioning

confidence: 99%

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Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults

Liu

Zhao

et al. 2019

Shock and Vibration

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Rub-impact between the rotating and static parts is a more common fault. The occurrence of faults is often accompanied by the generation of nonlinear phenomena. However, it is difficult to find out because the nonlinear characteristics are not obvious at the beginning of the fault. As a new frequency domain-based method, nonlinear output frequency response functions (NOFRFs) use the vibration response to extract the nonlinear characteristics of the system. This method has a better recognition rate for fault detection. Also, it has been applied in structural damages detection, but the high-order NOFRFs have the characteristics that the signals are weak and the features are difficult to extract. On this basis, the concept of the weighted contribution rate of the NOFRFs is proposed in this paper. The variable weighted coefficients with orders are used to amplify the influence of high-order NOFRFs on the nonlinearity of the system so as to extract its fault characteristics. The new index RI is proposed based on Clenshaw–Curtis quadrature formula to eliminate the effect of artificially selected weighted coefficients on sensitivity. Especially in the early stage of the fault, the new index varies greatly with the deepening of the fault. Both simulation and experimental results verify the validity and practicability of the new index. The new index has certain guiding significance in the detection of mechanical system faults.

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The construction and comparison of damage detection index based on the nonlinear output frequency response function and experimental analysis

Cited by 30 publications

References 13 publications

Dynamics Analysis of Active Variable Stiffness Vibration Isolator for Whole-Spacecraft Systems Based on Nonlinear Output Frequency Response Functions

Dynamics Analysis of Active Variable Stiffness Vibration Isolator for Whole-Spacecraft Systems Based on Nonlinear Output Frequency Response Functions

Sealant Delamination Detection of Structural Sealant Glazing Systems Based on Driving-Point Accelerance

Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults

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