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Focused on the CCD composite dielectrics (Si3N4/SiO2), the method of the thermal-mechanical coupling simulation was studied by three different ANSYS models including the whole model, the 1/4 model and the 2-D model in this paper. The thermal stress and deformation were calculated, and the reasonableness of the simulation method was validated, and the differences of these three models simulation results...
A simulation model for joint optimization of GM and spare part inventory control under infinite horizon is presented through analyzing the characteristic of spare part demand of a system under group maintenance (GM) policy. In this model, maintenance activities of GM and spare supply are simulated using Monte Carlo method, by which costs of repair, spare inventory, and loss of system downtime induced...
This paper develops a METRIC-like model to optimize inventory allocation of repairable spares in a three-echelon supply system. Supply availability is selected as the optimizing object of the model, and the total ordering cost of repairable spares is taken as the constraint condition. The optimal allocation of repairable spares is reached by the marginal analysis algorithm. Then the established model...
This research takes the safety inventory and the uncertainty of supply and demand in inventory distribution network into consideration, establish the reliability model and supply-demand distribution model, and demonstrates the feasibility and practicability of the model which is used to solve problems of reliability of supply-demand distribution in spare parts inventory distribution network.
Treating product quality as the ultimate embodiment of military product quality has been paid more and more attention to. Taking necessary measures and management methods to evaluate product using quality and effective control of product quality, has become urgent need to solve the problem. This paper described using quality of product, quality information, the basic concept of quality evaluation...
Engineering experience reminds us of the importance of uncertainty analysis in fatigue reliability based design. In the present paper, according to the procedure of fatigue reliability analysis, parameter uncertainty and model uncertainty are studied and the corresponding solutions are reviewed. The aim of parameter uncertainty analysis is to obtain reliability index to quantify uncertainties imported...
To a prolonged operation production system, if the availability of facility production capability is strong randomness, design appropriate amount of buffer stock to meet the continued operation or the maximum to reduce the loss because of the preventive maintenance process and occasional failure is very necessary. In this paper, we trade off the holding cost, shortage cost, the occasional failure...
The mission reliability analysis and evaluation of complex system is a very important domain of reliability engineering. Aiming at the problem of complex system mission reliability simulation, basing on multi-agent simulation modeling technology, the paper brings forward a simulation modeling method for complex system mission reliability simulation via mission profile modeling, environment profile...
The demand of kinematic accuracy is increasing for modern mechanical systems, while elastic deformation will lead to the decline in kinematic accuracy. This paper examines the application of finite element analysis (FEA) method to kinematic error analysis of elastic mechanisms based on Kineto-Elastodynamics model. The simulation of limit state equations of link mechanisms is performed with Back Propogation...
Traditional dynamic reliability analyzing methods which are evolved from those methods used in discrete system, are short in dealing with continuous variable and process variable. Using dynamic reliability analyzing methods, this paper proposes a system hybrid dynamic model in which discrete events are included in the continuous system model. Simulation results show that this method can detailed depict...
The paper analyzes the conception and the measuring model of operational availability. For the restrictions of present models' assumptions, an instantaneous operational availability model and an average operational availability model for evaluating material availability together with a simulation method for the two models are put forward. The distinctions between the two models are also given by the...
In this paper, we presented a simulation based model to analysis the reliability of phased-mission system (PMS) with repairable components. Many researches on the repairable PMS supposed that failed components would be repairable only when the system is in a good state. It is different here that failed components can be repaired no matter what state is the system in. The mission successes if and only...
Cargo transport can perform many type missions, such as airlift, airdrop and airborne etc. Each type mission need corresponding cargo configuration by installing mission equipment in the cargo to meet the need of the mission. The configuration proportions of mission equipments must consider the mission capability rate, economy and utilization ratio. The paper take small scale cargo transport fleet...
New ordnance equipment posed a new challenge for maintenance support ability of the army. It is urgent to set up a scientific method to allocate maintenance task and layout support resource. Aimed at this requirement, a general method of maintenance task allocation and support resource programming is built up which can optimize and standardize the analysis process. The key techniques and their interfaces...
Based on general researches regarding visualization theory and application practices, this paper concentrates on the visualization techniques in business process simulation (BPS) and presents a review of visualization in BPS. It gives the procedures of BPS, summarizes the three kinds of typical visualization techniques. According to the BPS steps, different visualization usage in different BPS phase...
In order to optimize the process of equipment maintenance and improve the maintenance efficiency effectively, by the four steps of choosing the method of DOE, fitting the model, analyzing the residual and optimizing the result, equipment maintenance process optimization model method under equipment maintenance lean six sigma project is established based on design of experiment (DOE). Via taking a...
The maintenance support level of armies has an important effect on their integrated combat efficiencies. How to evaluate the capability of a given maintenance support network is very important for equipment maintenance support scheduling. This paper proposes an object-oriented Petri net (OOPN) based approach for modeling and analyzing the capability of the maintenance support network. First, it presents...
Aiming at the atrocious storage environment of missile solid rocket motor, especially the higher requirement for structural reliability, based on the modified Arrhenius and GM-BP methods, the solid rocket motor life prediction principle was proposed. Using these methods, the engine life estimate and the propulsion system store life prediction model were founded. The modified Arrhenius method suits...
A two-level inventory supply system is designed with considering the randomness of supply chain mode and consumption rate of military equipment. Each level inventory's cost construction is analyzed based on Economic Order Quantity (EOQ) model. The optimization of order and delivery period is validated by a real example.
Possibilistic reliability theory is the study of reliability based on the principles of possibility theory. In this paper, the possibilistic reliability function of multi-state system is redefined and analyzed utilizing the possibility distribution of system lifetime. In order to express the internal relationship between system state and residual lifetime, state corresponding most possible residual...
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