Identification of bolted lap joints parameters in assembled structures

Ahmadian, Hamid; Jalali, Hassan

doi:10.1016/j.ymssp.2005.08.015

Cited by 124 publications

(65 citation statements)

References 13 publications

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“…Proper modelling of bolted joints is critical to estimating the dynamic characteristics of reciprocating compressors. The characteristics of bolted joints have drawn much attention in recent years [5][6][7][8][9][10][11][12]. Pratt and Pardoen [5] proposed nonlinear finite element models to predict the load-elongation behaviour of conical-head bolted lap joints and verified simulation results by the comparison to test data.…”

Section: Introductionmentioning

confidence: 99%

“…Pratt and Pardoen [5] proposed nonlinear finite element models to predict the load-elongation behaviour of conical-head bolted lap joints and verified simulation results by the comparison to test data. Ahmadian and Jalali [6] established a detailed parameter model of a bolted joint interface and extracted modal parameters by the force-state mapping method. Kim et al [7] established four kinds of numerical models to investigate the pretension effect and contact behaviour of bolted joints.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation and Experimental Validation of the Vibration Modes for a Processing Reciprocating Compressor

Zhao

Chen

Zhou

et al. 2017

Shock and Vibration

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The low-order vibration modes of a reciprocating compressor were studied by means of numerical simulation and experimental validation. A shell element model, a beam element model, and two solid element models were established to investigate the effects of bolted joints and element types on low-order vibration modes of the compressor. Three typical cases were compared to check the effect of locations of moving parts on the vibration modes of the compressor. A forced modal test with the MRIT (Multiple References Impact Test) technique was conducted to validate the simulation results. Among four numerical models, the solid element model with the bolt-pretension method showed the best accuracy compared with experimental data but the worst computational efficiency. The shell element model is recommended to predict the low-order vibration modes of the compressor with regard to effectiveness and usefulness. The sparsely distributed bolted joints with a small bonded region on the contact surface were key bolted joints that had greater impacts on the low-order vibration modes of the compressor than the densely distributed bolted joints. The positions of the moving parts had little effect on the low-order vibration modes of the compressor.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Validation of the Vibration Modes for a Processing Reciprocating Compressor

Zhao

Chen

Zhou

et al. 2017

Shock and Vibration

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“…For a long time, many scholars at home and abroad have carried out a lot of studies [2][3][4]. Dynamics model of joint surfaces was built by Zhou and Sun [5] as a springdamper mechanical model from the aspects of macro.…”

Section: Introductionmentioning

confidence: 99%

Fractal Prediction Model for Normal Contact Damping of Joint Surfaces considering Friction Factors and Its Simulation

Yue

Zhao

et al. 2014

Advances in Mechanical Engineering

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To research the dynamic characteristics of the joint surfaces from the microperspective, the fractal prediction model of the normal contact damping of joint surfaces is established based on the "solid-gap-solid" contact model which was proposed by the author, tribology theory, and contact fractal theory. And the kinetic model of joint surfaces is improved to a certain extent. The influences of actual contacting area, friction coefficient, and the fractal dimension on the normal contact damping are revealed by the research of numerical simulation. Simulation results show that the normal contact damping of joint surfaces decreases to a constant value with the increase of actual contacting area, increases with the increase of friction coefficient, and decreases with the increase of fractal dimension. Actual contacting area influences the location of the turning point of the * -(critical friction coefficient), and the critical friction coefficient increases with the increase of actual contacting area. Normal damping coefficient of joint surfaces continuously decreases with the increase of fractal dimension and the difference of magnitude exists between normal contact damping coefficients with different fractal dimension values.

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“…In lumped models, the effect of joint is considered to be concentrated at a single point and the joint model has no dimension. Several models have been proposed: the Valanis model [11], the elasto-slip model [2], the LuGre model [2], the Iwan model [1], the Bouc-Wen model [12], models with Jenkins elements [12] and models integrating a cubic stiffness [13]. The second category, based on thin layer elements, is represented as an element with physical dimensions and specific force-displacement relation.…”

Section: Introductionmentioning

confidence: 99%

“…By increasing importance of friction in the joints (through an increase of the excitation amplitude), measured hysteresis loops became distorted and superharmonics appeared in the frequency spectra of the responses, showing the importance of considering higher order terms in the Fourier development of the response. Only odd harmonics were present suggesting the possibility to use a cubic stiffness in the bolted joint model [10,13] and to only consider odd harmonics in the harmonic balance method, usual practice for dry friction system [17].…”

Section: Introductionmentioning

confidence: 99%

An adaptive harmonic balance method for predicting the nonlinear dynamic responses of mechanical systems—Application to bolted structures

Jaumouillé

Sinou

Petitjean³

2010

Journal of Sound and Vibration

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adaptive harmonic balance method for predicting the nonlinear dynamic responses of mechanical systems. Application to bolted structures. Journal of Sound and Vibration, Elsevier, 2010, 329, pp.4048-4067. <10.1016/j.jsv.2010 AbstractAeronautical structures are commonly assembled with bolted joints in which friction phenomena, in combination with slapping in the joint, provide damping on the dynamic behaviour. Some models, mostly non linear, have consequently been developed and the harmonic balance method (HBM) is adapted to compute non linear response functions in the frequency domain. The basic idea is to develop the response as Fourier series and to solve equations linking Fourier coefficients. One specific HBM feature is that response accuracy improves as the number of harmonics increases, at the expense of larger computational time. Thus this paper presents an original adaptive HBM which adjusts the number of retained harmonics for a given precision and for each frequency value. The new proposed algorithm is based on the observation of the relative variation of an approximate strain energy for two consecutive numbers of harmonics. The developed criterion takes the advantage of being calculated from Fourier coefficients avoiding time integration and is also expressed in a condensation case. However, the convergence of the strain energy has to be smooth on tested harmonics and this constitutes a limitation of the method. Condensation and continuation methods are used to accelerate calculation. An application case is selected to illustrate the efficiency of the method and is composed of an asymmetrical two cantilever beam system linked by a bolted joint represented by a nonlinear LuGre model. The practice of adaptive HBM shows that, for a given value of the criterion, the number of harmonics increases on resonances indicating that non linear effects are predominant. For each frequency value, convergence of approximate strain energy is observed. Emergence of third and fifth harmonics is noticed near resonances both on vibratory responses and on approximate strain energy. Parametric studies are carried out by varying the excitation force amplitude and the threshold value of the adaptive algorithm. Maximal amplitudes of vibration and frequency response functions are plotted for three different points of the structure. Non linear effects become more predominant for higher force amplitudes and consequently the number of retained harmonics is increased.

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Identification of bolted lap joints parameters in assembled structures

Cited by 124 publications

References 13 publications

Numerical Simulation and Experimental Validation of the Vibration Modes for a Processing Reciprocating Compressor

Numerical Simulation and Experimental Validation of the Vibration Modes for a Processing Reciprocating Compressor

Fractal Prediction Model for Normal Contact Damping of Joint Surfaces considering Friction Factors and Its Simulation

An adaptive harmonic balance method for predicting the nonlinear dynamic responses of mechanical systems—Application to bolted structures

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