A simplified coupled crankshaft–engine block model

Bellakhdhar, Bilel; Dogui, Abdelwaheb; Ligier, Jean-Louis

doi:10.1016/j.crme.2013.09.008

Cited by 9 publications

(5 citation statements)

References 12 publications

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“…Based on the research and analysis of scholars on the main bearings of diesel engines, the design parameters that may affect the strength, deformation, contact, and weight of the main bearing assembly structure are selected. 33,34 Combined with the numerical calculation of the main bearing assembly structure, the key design parameters of the main bearing assembly structure are extracted as design variables, including the structural size parameters, assembly parameters, and load parameters. The value range of each design variable is determined according to the limit of the design parameters, ensuring that the stress, deformation, and contact pressure of the structure are within a reasonable design range.…”

Section: Design Variables Determinationmentioning

confidence: 99%

Multi‐objective optimization of main bearing assembly structure based on improved NSGA‐II

Zhao

Tie-xiong

Liu

et al. 2021

Energy Science & Engineering

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Section: Design Variables Determinationmentioning

confidence: 99%

Multi‐objective optimization of main bearing assembly structure based on improved NSGA‐II

Zhao

Tie-xiong

Liu

et al. 2021

Energy Science & Engineering

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show abstract

“…As one of the important main load‐bearing structures of diesel engines, the main bearing assembly structure has always been the focus of the reliability research of HPD diesel engines 18–20 . It mainly consisted of the engine block, main bearing cover, main bearing shell, crankshaft, connecting bolts, and others.…”

Section: Introductionmentioning

confidence: 99%

“…As one of the important main load-bearing structures of diesel engines, the main bearing assembly structure has always been the focus of the reliability research of HPD diesel engines. [18][19][20] It mainly consisted of the engine block, main bearing cover, main bearing shell, crankshaft, connecting bolts, and others. Jiao et al investigated the strength reliability of the KL crankshaft by carrying out the physicochemical analysis, numerical simulation analysis and experimental research.…”

Section: Introductionmentioning

confidence: 99%

A multilevel multiobjective coordination matching design technique for the main bearing assembly structure of a diesel engine

Zhao,

Shi,

et al. 2023

Energy Science & Engineering

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The main bearing assembly structure is one of the most important main load‐bearing structures of a diesel engine. The working loads of this structure increases dramatically with the increase of the power density of diesel engines, resulting in the problem of unsatisfactory reliability coordination design in restricted design space, while the mechanisms for coordinated design are still at the blank stage. Aiming at the problem, a multilevel multiobjective coordination matching design technique is innovatively proposed in this paper. This technique is characterized by a multilevel multiobjective coordination evaluation system for the assembly structure and its components based on the improved analytic hierarchy process. The finite element model and mathematical model of the main bearing assembly structure are established to realize the joint of finite element technology and optimization technology for coordination matching design. By carrying out verification experiments, the strength coordination, deformation coordination and contact strength coordination of the assembly structure increase by 13.91%, 14.96%, and 2.63%, respectively, after matching design, while the mass coordination remains almost constant meeting the lightweight design requirements. The overall coordination of the main bearing assembly structure is improved by 11.10%, achieving the goal of matching design of the main bearing assembly structure. The results show that the coordination evaluation system can quantitatively characterize the coordination relationship of the assembly structure and the multi‐reliability of components, and it is a feasible coordination evaluation method. The demonstrated coordination evaluation system and coordination matching design modeling approach provide important theoretical guidance for the matching design of complex assembly structures.

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“…The proposal of a simplified engine block-crankshaft coupling model based on beam theory revealed the variation laws of the important parameters such as the bending stiffness of crankshaft and bearing deformation stiffness under load. 11 An efficient and numerically stable calculation model of a journal plain floating ring bearing was proposed to use in a virtual turbocharger assembled in multibody systems. And this approach allows to effectively solve transient events, such as turbocharger run-up, considering issues of rotor dynamics, tribology of bearings, flows of lubricant in the channels, and potentially also gas flow through the sealing system.…”

Section: Introductionmentioning

confidence: 99%

Research on coordination design method of main bearing assembly structure based on the maximum radial deformation of bearing bush

Zhao

Tie-xiong

Liu

et al. 2021

International Journal of Engine Research

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Aiming at the difficulty of control and evaluation of main bearing deformation in the coordination design of the main bearing assembly structure for a high-speed diesel engine, taking MRD (the MRD means the maximum radial deformation of the bearing bush) of the bearing bush as an index to evaluate the out-of-round deformation of the bearing bush was proposed in this paper. The numerical calculation method of the MRD was given and the correctness of the method was experimentally verified. And the influence rules of different design parameters on the MRD were analyzed. On this basis, the coordination multi-objective optimization research of the main bearing assembly structure was carried out, and the optimization results were analyzed based on the influence rules of different design parameters on the reliability indexes. The results show that, when the pre-tightening force of the vertical bolt and the bearing bush interference are 240 kN and 0.17 mm respectively, the MRD reaches the minimum value. If the two values continue to increase, redundant loads can be generated, leading to the increase of the MRD. After optimization, the engine block strength coordination and bearing cap strength coordination had increased by 2.47% and 10.48%, respectively, and the deformation coordination and contact coordination had increased by 46.15% and 14.84%, respectively.

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A simplified coupled crankshaft–engine block model

Cited by 9 publications

References 12 publications

Multi‐objective optimization of main bearing assembly structure based on improved NSGA‐II

Multi‐objective optimization of main bearing assembly structure based on improved NSGA‐II

A multilevel multiobjective coordination matching design technique for the main bearing assembly structure of a diesel engine

Research on coordination design method of main bearing assembly structure based on the maximum radial deformation of bearing bush

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