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High-Fidelity Model of the sandwich composite structure with real geometry is reported. The model includes two composite facesheets, honeycomb core, piezoelectric actuator/sensors, adhesive layers, and the impactor. The novel feature of the model is that it includes modeling of the impact and wave propagation in the structure before and after the impact. Results of modeling of the wave propagation,...
In this paper we investigate the utility of an interactive, desktop-based virtual reality (VR) system for training personnel in hazardous working environments. Employing a novel software model, CRAM (Course Resource with Active Materials), we asked participants to learn a specific aircraft maintenance task. The evaluation sought to identify the type of familiarization training that would be most useful...
This paper presents how an improvement can be realized by using prediction in Process Failure Mode and Effects Analyze (PFMEA) with the neural networks approach to determine the fault occurrence. Neural networks have the ability to time-series data prediction, in our case series containing all values of the failures of the items. The improvement in prediction of PFMEA has followed continuously data...
This article analysis the tunnel water leakage characteristics of the Trial operation of Shanghai Metro on the 7th line. Pointed out that the causes of disease, there are four main areas - engineering design, construction, project supervision, operations environment. Depth analysis of the key of the operations of leakage is segment structural cracks, surface subsidence, segment shrink, protected area...
Generally, asynchronous motors used in actuator systems (whether they are three-phase or single-phase motors) have two demountable bearing shields. This design allows easy access to the winding, on both sides of the stator, making the maintenance a relatively simple process. Another type of motor, with a special design, also exists. It has a single removable bearing shield, the other being made integral...
Virtual Reality (VR) models were created in order to help in the maintenance of exterior closures and interior finishes of walls and in the construction of buildings. The maintenance model allows the visual and interactive transmission of information related to the physical behavior of the elements. To this end, the basic knowledge of material most often used in walls, anomaly surveillance, techniques...
Equipment Support Process is a dynamic and complex process. Combining with the advantages of ARENA and UML, the models of equipment support process were established by the means of UML, including function models, dynamic models and object models. The frame work of UML-ARENA simulation software was constructed, and the mapping relations between UML object classes and ARENA models were designed. Based...
Globalization enables many high-tech manufacturing firms to have more reverse logistics demand; reverse logistics is further complicated when operating in a multinational setting. High-tech manufacturing firms thus must have an adequately large in-house fleet size as well as warehousing and advanced IT management systems to accommodate this unpredictable and large demand in reverse logistics. This...
This paper presents a methodology and corresponding results how interdependencies in-between lifecycle phases deriving from the application of Eco-Design strategies can be identified to support engineering management. Thereby, interdependencies among the phases `Product Planning', `Product Development', `Production Planning', `Production', `Distribution', `Utilization', `Maintenance', `Modernization'...
The benefits brought by information sharing in construction supply chain (ISCSC) can be manifested in many aspects. The calculation of added-value generated from information sharing is complicated and difficult, and this paper proposes to measure the above-mentioned benefits from three aspects: construction period, cost and quality. By establishing mathematical equations of added-value in terms of...
With the flourishing development of construction and real estate industry, engineering accidents happen more frequently. The purpose of this paper is to generate emergency case as quick as possible so as to improve the quick emergency reaction capability when engineering accident happens. The flow of CBR based emergency case generating system (CBR/ECGS) under engineering accidents is studied. Both...
Advertising is a critical process for promoting both products and services in trade. And most of the fluctuations in advertising revenue originate from fluctuations in the volume of advertising space sold.So far,experts usually use FCFS(First Come First Serve) principle to provide hirer with service.But FCFS couldn't control waiting time of maintenance.According to linear material cutting model,this...
To make an accurate prediction about the amount of equipment maintenance materials consumption (EMMC), which plays an important role of equipment maintenance materials support, precondition and management, an LM algorithm prediction model of EMMC established based on the improved BP neural network algorithm by means of history data processing, and which has been discussed and verified through example...
In modern conditions high quality of a life can be provided only under condition of natural systems preservation and quality of environmentmaintenance. Maintenance of harmonious economic social-natural interaction is offered by the sustainable development concept. A basis of transition to a new trajectory of development is change of public institutes. One of such institutes of functioning of a society...
In order to adapt to the new situation of the construction market, and consider to serve the construction market and the project cost management, the establishment of the Web-based Construction Cost Management Information System is of great practical significance. Through the establishment of a complete and systemic construction project cost information database, and the process for all kinds of cost...
The immense competitive pressure by global competition in the machine tool industry forces the companies to enlarge their efforts in respect to innovations, which is bond with the production of complex and high-tech products. In the meantime the shortening of a product’s life cycle leads to the condition that companies are to focus on their service offers in order to ensure an advantage in competition...
Study on the enterprise's technology innovation from the perspective of VE is to consider innovation as an activity or a process, and the purpose of analysis is to make a choice of the innovation strategy by functions and life-cycle cost analysis. Technological innovation strategy is an overall planning on technological innovation activities and can be divided into three types such as the innovation...
In order to achieve failure free functionality of heavy plant equipment, reliability centered maintenance technique is used which has its own limitations, such as tedious preventive maintenance tasks and significant start up costs. Moreover, previous method uses cased based reasoning which does not work when two or more cases conflict and no or an inapplicable solution is provided to the problem....
According to the manufacturing management situation in the shop of aviation enterprise, work-in-process management and control as the inevitable result of the production process have become the key link of production plan. Due to the growing production requirements and the potential economical benefits of manufacturing process flow, aviation enterprises have been pushed to integrate work-in-process...
EDF studies the maintenance of its main nuclear components. Until now, maintenance strategies need to operate in air, after draining water from the component. A great benefit is identified to perform its operation underwater. This paper deals with the study of one of the main processes used for maintenance, milling, implemented underwater. The study demonstrated the feasibility of underwater robotized...
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