Design and analysis of the thermal-stress coupled topology optimization of the battery rack in an AUV

Mao, Zhaoyong; Yan, Shaokun

doi:10.1016/j.oceaneng.2017.11.025

Cited by 16 publications

(5 citation statements)

References 5 publications

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“…Then, seeking materials distribution for optimal performance of structure under a certain material. Mao et al [12] applied the Solid Isotropic Material with Penalization (SIMP) method to design the battery rack in an AUV, and obtained the optimization results under different ratios of force and thermal loads. The results demonstrated that topology optimization could reduce the temperature gradient of the battery rack structure while bearing the force load.…”

Section: Introductionmentioning

confidence: 99%

Topology Optimization of Stiffener Layout Design for Box Type Load-Bearing Component under Thermo-Mechanical Coupling

Yang¹,

Xiong²,

Du³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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The structure optimization design under thermo-mechanical coupling is a difficult problem in the topology optimization field. An adaptive growth algorithm has become a more effective approach for structural topology optimization. This paper proposed a topology optimization method by an adaptive growth algorithm for the stiffener layout design of box type load-bearing components under thermo-mechanical coupling. Based on the stiffness diffusion theory, both the load stiffness matrix and the heat conduction stiffness matrix of the stiffener are spread at the same time to make sure the stiffener grows freely and obtain an optimal stiffener layout design. Meanwhile, the objectives of optimization are the minimization of strain energy and thermal compliance of the whole structure, and thermo-mechanical coupling is considered. Numerical studies for square shells clearly show the effectiveness of the proposed method for stiffener layout optimization under thermo-mechanical coupling. Finally, the method is applied to optimize the stiffener layout of box type load-bearing component of the machining center. The optimization results show that both the structural deformation and temperature of the load-bearing component with the growth stiffener layout, which are optimized by the adaptive growth algorithm, are less than the stiffener layout of shape '#' stiffener layout. It provides a new solution approach for stiffener layout optimization design of box type load-bearing components under thermo-mechanical coupling.

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Section: Introductionmentioning

confidence: 99%

Topology Optimization of Stiffener Layout Design for Box Type Load-Bearing Component under Thermo-Mechanical Coupling

Yang¹,

Xiong²,

Du³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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“…Bracket et al 20 and Zhuet al 21 applied the SIMP method considering thermo-mechanical coupled to the engineering field, the results proved that this method can improve the heat dissipation and mechanical properties of the material. Mao and Yan 22 used topology optimization to design the battery rack in an AUV, and obtained the optimization results under different ratios of force and thermal loads. The results demonstrated that topology optimization can reduce the temperature gradient of the battery rack structure while bearing the force load.…”

Section: Introductionmentioning

confidence: 99%

Cage structural topology optimization considering thermo-mechanical coupling

Yang

Guo

Weng

et al. 2022

Advances in Mechanical Engineering

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The performance of the cage can directly affect the service life of the bearing. This paper presents a cage topology optimization method for improving the heat dissipation and structural stiffness. Firstly, a multi-objective structural topology optimization model is established based on the SIMP method and MMA algorithm, the effects of force and thermal load are considered comprehensively. Secondly, considering the centrifugal force and frictional heat, under the conditions of a given volume constraint, the bearing cage topology optimization model is carried out with heat dissipation weakness and compliance as the optimization objectives. Using iterative calculations based on the MMA algorithm and boundary smoothing processing, the structure with the optimal material layout is obtained. Finally, compared with the initial structures, the maximum temperature reduces about 27% and the maximum stress reduces about 14.8%. The results show that topology optimization can provide a reference for the design of bearing cages, which can improve the structural performance while reducing weight.

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“…Underwater mooring platforms (UMPs) are a collection of oceanographic devices, which are connected to a chain and anchored on the seafloor, and deployed in deeper waters, areas covered by sea ice, areas within or near shipping lines or areas that are prone to theft or vandalism. The UMPs can implement military missions and civilian researches even among awful ocean environment [1,2]. The attached instrumentation is wide-ranging but often includes CTDs (conductivity, temperature depth sensors), current meters (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…These passive sonars are designed with low power consumption (0.25 W). Long-term UMPs can be deployed for duration of half a year, powered with alkaline or lithium battery packs [1]. However, the power capacity of battery packs is constrained by the confined space and volume, then the long-endurance and consecutive capacities for UMPs are restricted [5].…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of a two-directional energy harvester with low-frequency vibration

Ding

Mao

Cao

et al. 2020

Smart Mater. Struct.

Self Cite

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This study evaluates the power harnessing performance of a two-directional inertial pendulum energy harvester for miniature underwater mooring platforms (UMPs). This novel harvester can achieve a dominant rotational motion under different parametrical excitations. The two-directional energy harvesting performance is investigated through vibration platform experiments over rollpitch coupling excitations. The frequency ratio between the pitch and roll motion is about 2 to 1, the roll excitation frequency is over the range of 0.2-0.3 Hz, and the pitch amplitude is much lower than the roll amplitude. Experimental results indicate that the inclination configuration of the harvester can improve two-directional energy harvesting performance significantly with lowfrequency vibration. Geometrical tunability through adjusting inclination configuration for the harvester can enhance the two-directional energy harvesting apparently. Four prominent phenomena of the two-directional energy harvesting performance are observed with the increasing load resistance. The motion state transformation of the inertial pendulum can result in dramatical jumps or drops in two-directional energy harvesting.

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Design and analysis of the thermal-stress coupled topology optimization of the battery rack in an AUV

Cited by 16 publications

References 5 publications

Topology Optimization of Stiffener Layout Design for Box Type Load-Bearing Component under Thermo-Mechanical Coupling

Topology Optimization of Stiffener Layout Design for Box Type Load-Bearing Component under Thermo-Mechanical Coupling

Cage structural topology optimization considering thermo-mechanical coupling

Performance evaluation of a two-directional energy harvester with low-frequency vibration

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