A dynamic modeling approach for nonlinear vibration analysis of the L-type pipeline system with clamps

Chai, Qingdong; Zeng, Jin; Ma, Hui; Li, Kun; Han, Qingkai

doi:10.1016/j.cja.2020.04.007

Cited by 63 publications

(12 citation statements)

References 57 publications

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“…Therefore, in actual modeling, multiple spring pairs need to be used. Here, according to previous experience (Chai et al , 2020), each hoop position is simulated by two spring pairs (as Figure 2(b) shows).…”

Section: Analysis Of Vibration Response Of Pipeline Under Random Exci...mentioning

confidence: 99%

Vibration response analysis and hoop layout optimization of spatial pipeline under random excitation

Wang

Sun

Gao

et al. 2022

AEAT

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Purpose In many cases, the external pipelines of aero-engine are subjected to random excitation. The purpose of this paper is to reduce the vibration response of the pipeline system effectively by adjusting the hoop layout. Design/methodology/approach In this paper, a spatial pipeline supported by multi-hoops is taken as the object, the methods of solution of the vibration response of the pipeline system by using pseudo excitation and hoop layouts optimization with amplitude reduction of vibration response as the goal are presented. First, the finite element model of the spatial pipeline system is presented. Then, an optimization model spatial pipeline is established. Finally, a case study is carried out to prove the rationality of the random vibration response analysis of the pipeline system. Furthermore, the proposed optimization model and genetic algorithm are applied to optimize the hoop layout. Findings The results show that the maximum response variance after optimization is reduced by 32.8%, which proves the rationality of the developed hoop layout optimization method. Originality/value The pseudo excitation method is used to solve the vibration response of aero-engine pipeline system, and the optimization of the hoop layout for aero-engine spatial pipelines under random excitation to reduce random vibration response is studied systematically.

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Section: Analysis Of Vibration Response Of Pipeline Under Random Exci...mentioning

confidence: 99%

Vibration response analysis and hoop layout optimization of spatial pipeline under random excitation

Wang

Sun

Gao

et al. 2022

AEAT

View full text Add to dashboard Cite

show abstract

“…C t is affected by many factors, such as the size of damping orifice, the density and temperature of silicone oil, and the viscosity and shear rate of silicone oil. It usually exhibits a complex nonlinear behavior [29].…”

Section: Driving Mechanismmentioning

confidence: 99%

Trim Flap System Design for Improving Ballistic-Lifting Entry Performance of the Tianwen-1 Mars Probe

et al. 2022

Aerospace

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The trim flap is an aerodynamic control surface capable of allowing Mars entry vehicles to improve landing performance during the most dangerous entry, descent, and landing (EDL) phase. In present work, a deployable trim flap system was proposed to meet the aerodynamical trim requirement of the Tianwen-1 Mars probe, which provided a mass-saving alternative to the conventional use of the center-of-gravity (CG) offset of ballast mass. In order to guide the trim flap design, theoretical and finite element (FE) models were established to predict and evaluate the deployment performance. Then, a full-scale physical prototype was manufactured for deployment experiments to verify the design effectiveness as well as validate the theoretical and FE models. Results predicted by theoretical and FE models were in good agreement with deployment experiments. Furthermore, the effects of three factors on the deployment performance were investigated, including the non-linear behavior of the damping, acceleration environment, and backshell flexibility. The manufactured prototype was installed on the Tianwen-1 Mars probe, saving more than 300 kg when compared to the conventional use of ballast mass CG offset, and assisted Tianwen-1 in achieving a successful landing, making China the first country in the world to utilize the trim flap technology for Mars EDL.

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“…Using the measured data of the test rig, the nonlinear system of the loosening clamp is identified. Multi-scale method is used to analyze the vibration characteristics of the nonlinear system under main resonance, and the frequency responses of the nonlinear system are obtained [28][29]. Finally, the test of different severity of looseness of the clamp is performed.…”

Section: ⅳ Conclusionmentioning

confidence: 99%

Nonlinear Characteristic of Clamp Loosing in Aero-Engine Pipeline System

et al. 2021

Self Cite

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Long service time and excessive vibration of aero-engine will cause failure of clamps, which usually fix pipelines on the outside of an aero-engine. In this paper, the nonlinear vibration characteristics caused by loosening clamps in aero-engine pipeline are determined. According to the real parameters of an aero-engine clamp-pipeline test rig, the clamp is simplified into a nonlinear spring-damping. Thus, a clamppipeline nonlinear model based on cubic stiffness is established. The multi-scale method is used to obtain the analytical solution of the nonlinear model. Based on the real test data, the model parameters of the clamp-pipeline nonlinear system are identified, and then the nonlinear vibration characteristics of the system are obtained. Finally, using the vibration transmissibility method, the influence of the severity of clamp loosening on the nonlinear vibration characteristics of the system is obtained.

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A dynamic modeling approach for nonlinear vibration analysis of the L-type pipeline system with clamps

Cited by 63 publications

References 57 publications

Vibration response analysis and hoop layout optimization of spatial pipeline under random excitation

Vibration response analysis and hoop layout optimization of spatial pipeline under random excitation

Trim Flap System Design for Improving Ballistic-Lifting Entry Performance of the Tianwen-1 Mars Probe

Nonlinear Characteristic of Clamp Loosing in Aero-Engine Pipeline System

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