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Dołączył: 29 Paź 2010
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 Wysłany: Śro 20:08, 12 Sty 2011 Temat postu: moncler jacken Highway road construction machinery |
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Highway optimal allocation of road construction machinery
Type general service system. Application of queuing theory, by determining the characteristics of the system work with random parameters,[link widoczny dla zalogowanych], calculate the system efficiency indicators to determine the optimal system configuration. However, the computational complexity of this method,[link widoczny dla zalogowanych], the calculation of some parameters difficult to draw well-established formula, which was held only by one by one calculation method, and then compare the parameters one by one, in order to obtain a fuzzy result. This is obviously difficult and practical, but can learn about ideas. Road construction work, operation of mechanical systems the total number of vehicles remains the same, first come first serve. To make mixing machine and the paver the high cost of two large full play the role of mechanical work during the mixing machine always has a dump truck waiting at the loading; Similarly, there is always the paver at a waiting dump truck discharge, the number of vehicles that run on the following formula to determine the (L / V + L / V +). -------- Ten where a: L for the dump truck transport distance (kin): V, Vz, respectively, and heavy dump truck load average transport speed (km / h); for the average truck load Time (h), t ~ = g / P. ; G for the dump load (t); for the average truck unloading time (h), = g / P. AMPRS system in order to achieve the reasonable allocation of models to ask, first determine the system's leading machinery,[link widoczny dla zalogowanych], other machinery driven by productivity and Number machinery may be. In theory, to improve the speed of construction, should play a redundant sub-paver ability to work. However, in actual construction, the mixing machine capacity generally can not fully meet the requirements of the productivity of paver. Therefore, we should choose the lesser of the two production-oriented machine, the construction process to ensure the continuity and stability. When the production capacity of paver production capacity greater than the mixing machine, the paver should be adjusted to the speed or decrease the work of paving width for single paving operation, so that the production capacity of Pavers and a leading mechanical mixing machine production capacity to match the production capacity of roller should be slightly larger than the production capacity of Pavers. Cluster configuration is the optimal construction schedule and construction quality assurance under the premise that the utilization of the aircraft to the highest, ie, the lowest unit cost of construction, the equation used to evaluate the ninC a ΣBJl where: c for the types of machines Taiwan class with a total production cost; B class for the cost of the Taiwan machinery J;, J Number of units for the mechanical construction of the least expensive unit combination for optimal allocation models. Cluster configuration to achieve the most concern, in theory, computation is accurate, the only, but the actual operation, should be based on the specific situation of enterprises existing machinery, the productivity to meet the requirements of the leading mechanical construction period and the conditions required to select more kinds of quasi-optimal cluster configuration, the economic analysis and comparison, to choose the optimal program. 2 road construction machinery optimal configuration program according to the principle of optimal allocation, relational data using FoxPro2.6 She systems (DBMS) are strong advantages of transaction processing and imitation WINDOWS interface SDK tools, we developed a practical road optimal allocation of construction machinery group computer program. (1) process workflow. Workflow processes, such as photo shows. (2) flow chart for instructions. The selection process is based on a variety of mechanical engineering capacity and construction machinery, construction period and the optimal assignment routine of Xi'an Jiaotong University 78,[link widoczny dla zalogowanych], l998 Fu Cheng Chuai photos Zhu Cheng set back requirements of the work to choose. As calculated according to the optimal configuration of the mechanical principles of the main parameters, not necessarily meet the company's existing machinery. So choose a machine in each before and prompts a calculation of the optimal range of parameters of the machine and the company's existing list of the machinery for the selection, the selected models were then checked and read the model parameters and the last Find the number of models of the configuration table. After all selected models, the production capacity of the fleet, the construction period, Taiwan class production, unit cost and total cost of construction such as data calculation, then the output of the configuration of the relevant configuration data. Also from the quasi-optimal solution in several select the optimal solution. 3 Conclusion (1) This program is run entirely consistent with the theoretical results. (2) The checksum in the construction practice,[link widoczny dla zalogowanych], all kinds of machinery with better utilization and higher, can more clearly the low parapet construction costs. (3) full Chinese display, imitation WINDOWS graphical interface, the operation vivid, simple and convenient, and highly practical value.
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