Due to the different microstructures caused by the heat source effect,welding joints exhibit significant differences in mechanical properties compared to the base *** characterization of the constitutive characteristi...
详细信息
Due to the different microstructures caused by the heat source effect,welding joints exhibit significant differences in mechanical properties compared to the base *** characterization of the constitutive characteristics of the welded joint requires a large number of repetitive experiments,which are costly,inefficient,and have limited accuracy *** paper proposes an integrated experimental-simulation-based inverse calibration method,which establishes a calibration optimization problem based on the corresponding constitutive model and a finite element calculation model built by the distribution of hardness in the *** the global tensile force-displacement curve of the MIG-welded 6005A-T6 aluminum alloy specimen and the experimental data of local deformation with time change obtained from DIC(Digital Image Correlation),the parameters involved in the constitutive models are optimized *** method can directly obtain the constitutive characteristics of the weldment under conditions of limited experiments and insufficient ***,the adaptability of the constitutive model to the calibration method and the influence of optimization results are discussed and *** results indicate that the global force-displacement response of the non-saturated Ramberg-Osgood(R-O)model is in the best agreement with that of the experimental data,and the energy error is only 2.62%,followed by the MPL model,while the saturation-based Voce model shows the largest simulation error in terms of the presented ***,the simulation results of R-O,Voce,and MPL models in the local area are far superior to traditional fitting methods.
The railway transportation system is a complex system composed of 'human' and 'machine' elements. Among the 'human' components, whether train drivers operate according to regulations and proced...
详细信息
Coordinated control of coal-fired units is a key system to ensure the stability and economic operation of power supply. While the nonlinearity, strong coupling, and large inertia of coal-fired units bring about challe...
详细信息
In this paper, we study the exact reachability of a kind of linear stochastic systems with partial information. The system is described by a class of Itô stochastic differential equation that includes a controlle...
详细信息
The remaining useful life (RUL) prediction is vital to the heath management of Proton exchange membrane fuel cell (PEMFC). However, it is challenging for RUL prediction due to the multiple complex factors such as P E ...
详细信息
Effective ingredient plan plays a crucial role in the copper industry as it directly impacts both economic interest and resource utilization of the enterprise. Aims at minimizing both production cost and loss simultan...
详细信息
This paper, a control method for suppressing attitude disturbance of a tail-sitter UAV is proposed. Due to the special structure of the UAV and the change of pitch angle during the transition, nonlinear terms and unwa...
详细信息
The state of charge (SOC) estimation is essential for battery management systems (BMS), necessitating proper modeling and filtering approaches. This study zeroes in on enhancing the accuracy of SOC estimation of batte...
详细信息
With the increasing prevalence of lithium-ion batteries, the accurate prediction of remaining useful life (RUL) has emerged as a critical concern. However, the model-based approach exhibits stable estimation but lacks...
详细信息
In this paper,the authors consider distributed convex optimization over hierarchical *** authors exploit the hierarchical architecture to design specialized distributed algorithms so that the complexity can be reduced...
详细信息
In this paper,the authors consider distributed convex optimization over hierarchical *** authors exploit the hierarchical architecture to design specialized distributed algorithms so that the complexity can be reduced compared with that of non-hierarchically distributed *** this end,the authors use local agents to process local functions in the same manner as other distributed algorithms that take advantage of multiple agents'computing ***,the authors use pseudocenters to directly integrate lower-level agents'computation results in each iteration step and then share the outcomes through the higher-level network formed by *** authors prove that the complexity of the proposed algorithm exponentially decreases with respect to the total number of *** support the proposed decomposition-composition method for agents and pseudocenters,the authors develop a class of *** operators are generalizations of the widely-used subgradient based operator and the proximal operator and can be used in distributed convex ***,these operators are closed with respect to the addition and composition operations;thus,they are suitable to guide hierarchically distributed design and ***,these operators make the algorithm flexible since agents with different local functions can adopt suitable operators to simplify their ***,numerical examples also illustrate the effectiveness of the method.
暂无评论