Abstract Undetected fatigue and overload damages at the key locations of crane boom are among biggest threats in construction, leading to structural failure. Thus, health should be monitored real time ensure that it works under designed load capacity. In this study, we developed a lightweight digital twin by multifidelity surrogate (MFS) model improve real-time monitoring prediction accuracy safety boom. Digital technology, which can establish mapping between physical space space, has...

This article proposes an adaptive dragonfly algorithm (DA) for the structural optimization of frame structures. algorithm, named Coulomb force search strategy-based (CFSSDA), combines strategy (CFSS) with DA method. The CFSS is applied to automatically determine step in each iteration, thus enhancing exploration capability CFSSDA. performance CFSSDA investigated on basis three widely used benchmark numerical examples. results indicate that proposed achieves a markedly improved convergence...

Battery thermal management system (BTMS) is a complex and highly integrated system, which used to control the battery conditions in electric vehicles (EVs). The BTMS consists of many subsystems that belong different disciplines, poses challenges optimization using conventional methods. This paper develops general variable fidelity-based multidisciplinary design (MDO) architecture optimizes by considering systems/disciplines from systemic perspective. Four and/or subdisciplines are modeled,...

A multidisciplinary design optimization model is developed in this article to optimize the performance of hard rock tunnel boring machine using collaborative architecture. Tunnel a complex engineering equipment with many subsystems coupled. In established process article, four are taken into account, which belong different sub-disciplines/subsytems: cutterhead system, thrust driving and economic model. The technology models machine’s build objective minimize construction period from system...

Ballast systems and ballast water dynamic allocation between tanks are very important for ensuring the offshore operation efficiency safety of revolving floating crane (RFC). Its modeling solving have multiple difficulties such as complexity, complexity engineering practicability. Early studies showed that domain knowledge is great significance optimization design quality innovation complex issues. By analyzing coupled process characteristics among crane, ship hull system, a model based on...

Polar ships are subjected to the ice loading. Low temperature impact toughness of ship steels is important for ice-breaking efficiency and navigation safety polar ships. In this paper, absorption energy EH36 steel under different temperatures, velocities plate thickness analyzed by experimental test, Taguchi ANOVA method. The was divided into crack formation propagation energy. results show that positively correlated with temperature, negatively velocity when it in state. order significance...

Purpose The traditional precision design only takes the influence of geometric tolerance parts and does not involve load deformation in assembly process. This paper aims to analyze mechanism flexible on precision, then ensure reliability stability mechanical system. Design/methodology/approach Firstly, this adopts N-GPS constructs a coupling 3D mathematical model deviation based SDT theory, homogeneous coordinate transformation theory surface authentication idea. Secondly, least square...

Abstract The navigation safety of polar ships depends on accurate monitoring ice conditions along the route. Complex environments but scarce datasets pose challenges for deep learning‐based object detection methods. To address this issue, we propose an method based environment adaptive image enhancement. This approach adaptively augments dataset by simulating such as snowflakes and aurora to improve training precision models in harsh meet needs safe ships. First, augmentation randomly...

Purpose This paper aims to comprehensively achieve the requirements of high assembly precision and low cost, a precision-cost model based on three-dimensional (3D) tolerance is established in this paper. Design/methodology/approach The related parts deformation matching surfaces under load. In paper, small displacement torsor (SDT) theory first utilized analyze manufacturing tolerances deviation surface. meanwhile, extracting method SDT parameters proposed calculation 3D established. Second,...

Non-circular gear systems (NCGSs) are among the most widely used transmission mechanisms in bucket wheel stacker/reclaimers (BWSRs), performance of which depends greatly on NCGS dynamic characteristics such as efficiency, vibration, and gear-teeth failure. To improve dynamical performance, a new non-circular system is designed based principle gears while taking into account special requirements BWSR. The newly comprises sun gear, fixed four planetary gears. By considering time-varying...

Large cable shovel is a complex mechatronic system used for primary production in the open pit mine. For such structure-control highly coupled system, conventional sequential design strategy (structure followed by control optimization sequence) cannot manage this interaction adequately and explicitly. In addition, large consists of number sub-systems and/or disciplines, which also poses challenges to global optimal shovel. To enhance shovel’s performance, an integrated combining simultaneous...

In general design and analysis of a tunnel boring machine (TBM), many analytical models are proposed to predict the TBM's performance. Various may result in different performance predictions for same TBM excavating under geological conditions. Therefore, it is essential perform quantitative impacts from prediction corresponding key input factors on Recently, there almost no relevant study such issues urgent fill this gap. paper, by comparing analyzing using models, three types total thrust...

Turn-milling is regarded as the milling of a curved surface while rotating workpiece around its center point, which combines effectively advantages both turning and milling, wherein it allows for good metal removal with difficult-to-cut thin-walled workpieces in aviation. The objective present work to study cutting force by turn-milling condition. Aiming at deformation properties blade, predicted models rigid flexible ball cutter are provided, respectively, process. values blade calculated,...

As the key route detection device, performance of marine LiDAR in harsh environments is great importance. In this paper, a metric reliability analysis method for systems under extreme wind loads proposed. First, static measurement accuracy evaluation model system proposed, targeting problem that tail reduces accuracy. Second, distribution speeds Pacific Northwest investigated, and load probability developed. Finally, impact hull fluctuations on analyzed by performing fluctuation simulations...