Abstract
Structural stiffness exerts from joint connections and contact interfaces are significantly affect the dynamic behaviour of the bolt-jointed structure. Randomness in the joint connections due to the manufacturing variability in the identical bolted joints and uncertainty in contact interfaces due to the assambled and reassambled of the joint structure make sets of the dynamic behaviour of the bolt-jointed structure always inconsistent. On this account, a stochastic analytical model needs to be developed for the bolt-jointed structure to be used for uncertain parameters quantification. Hence, this paper is intended to propose an accurate and efficient stochastic analytical modelling of bolt-jointed structure in predicting the dynamic behaviour of the structure due to the randomness in the joint connections and uncertainty in contact interfaces. The aim of the study was accomplished by investigating four different finite element (FE) models of bolt-jointed structure with different element connectors to represent the bolted joints connections, namely rigid element (RBE), beam element (CBEAM), and 2 types of spring elements namely CELAS and CBUSH. Stochastic modelling was conducted by coupled the appropriate FE models with Latin Hypercube Sampling (LHS) algorithm to provide variability sampling due to the randomness in the bolted joints. The experimental modal analysis was performed by reassembled and disassembled the bolted joints to extract the variability in the dynamic behaviour, and the results were compared with LHS using statistical characteristics. Stochastic model updating then was used to minimise the discrepancies between experimental result and predicted model. The result has shown that the CBUSH is the most appropriate connector to accurately predict the dynamic behaviour of the bolt-jointed structure under variability conditions using the stochastic model updating method.
Highlights
Bolt joints are widely used in the mechanical industries, such as in the applications of automotive engine, pipe flanges, and machining pulley joint
This paper focuses on developing an accurate stochastic dynamic behaviour of bolt-jointed structure with concerning to model source of uncertainty contributed from stiffness properties of bolt joints interface and contact zones
The results of the first ten natural frequencies obtained from the Experiment modal analysis (EMA) and finite element method (FEM) of the substructures elliptical plate A and elliptical plate B were tabulated in Table 4 and Table 5
Summary
Bolt joints are widely used in the mechanical industries, such as in the applications of automotive engine, pipe flanges, and machining pulley joint. Accurate analytical modelling of boltjointed structure has always been found to be very difficult and cumbersome [1], [2]. The accurate responses obtained from analytical modelling is highly dependent on the structural model form and structural model parameters [3]. These criteria make the analytical modelling, especially using the finite element (FE) method becomes a challenging task. In the bolt-jointed structure, the modelling of the substructures, joint interfaces and contact zone are the three main characteristics that affect the reliability of the predicted responses
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Automotive and Mechanical Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
