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Development of Base Technologies

Doosan Infracore focuses on research on base technologies as a means of securing new technologies and making fundamental improvements to its products, and further enhances the value of its products via the application of advanced design processes.

Virtual Product Development

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    Operations of the VPD(Virtual Product Development) Process

    We identify problems that might occur in marketed products ahead of time and support systematic collaboration with related departments – including the Design, Testing and Production Departments – in order to improve on or rectify predicted problems through the integrated operation and management of virtually verifiable areas regarding construction equipment (excavators and wheel loaders) and engines of various sizes. Through such efforts, we succeed in stabilizing product quality and releasing verified products in the shortest possible time.

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    Structural Interpretation

    We strive to develop robust and highly reliable products by pre-verifying the strength/rigidity and fatigue characteristics of structures from the initial design stage to the final testing of a prototype. We also carry out R&D activities aimed at verifying design feasibility and shortening the development period by applying structural analysis technologies to the overall design of structures, including engine assembly and welding structures for construction equipment frames and fronts.

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    Dynamical Interpretation

    We use multi-body dynamical interpretation technologies to predict the dynamic behavioral characteristics of systems over time. We reflect the results of our evaluations of the dynamic loads and performances of products in our designs. We predict excavation loads and equipment behavior by simulating excavator operation modes linked to hydraulic and electronic control systems in dynamic analysis. We then pre-verify the dynamic characteristics and durability of major parts via an integrated, dynamic interpretation of engine moving systems such as crankshafts, valve trains, and gear trains.

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    Heat Flow Interpretation

    We verify and improve draft designs, enhance product reliability and performance, and shorten the development period by applying heat flow interpretation technologies. We also develop diverse HVAC interpretation technologies that are designed to make improvements in engine room cooling, and to predict breather performance and cabin heating and cooling performance, in order to evaluate the thermal stability of construction equipment. We apply the results to our product development processes, and also conduct breather combustion performance and cooling performance interpretation in order to predict engine performance. Finally, we apply heat flow interpretation technologies to performance prediction for after-treatment devices with the aim of meeting emission regulations.

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    Noise/Vibration Interpretation

    We carry out verification tasks through pre-review and testing with the aim of improving the rigidity and response characteristics of construction equipment structures, and analysis of the dynamic rigidity of engine/driving devices. We also analyze noise characteristics by applying suitable methods depending on frequency characteristics, among other factors; analyze the degree of contribution to the characteristics of cabin noise and external noise on the basis of the measured noise from its construction equipment; and pre-evaluate and improve sound power.

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    Digital Mock-Up

    We analyze and evaluate potential problems in virtual products with product design data expressed in three-dimensional CAD models. To secure design quality and minimize design time and costs, we create virtual mockups and conduct diverse processes to verify interference, clearance, regulation/safety, moving parts, operability, maintainability, flexible parts, and accumulated assembly tolerance.

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    Integrated Simulation

    We make comprehensive predictions of the overall behavior and performance of equipment by integrating numerous models of individual system into one. An integrated simulation creates an environment in which we do not have to build costly prototypes in order to make predictions about the loads and performance of individual systems, and enables us to solve problems in diverse areas using models built in the same environment. For instance, when the engine specifications are altered, it is possible to interpretively analyze the alteration’s impact on equipment.

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    Structure Optimization

    To secure the development of reliable and efficient products, we carry out topology optimization to determine the direction of a basic design at the initial design stage, and apply a set of interpretive methodologies in order to determine optimal design proposals through shape/size optimization and sensitivity analysis at the detailed design stage. We have also developed and applied the structural optimization technique, which that can take into account diverse loads and boundary conditions for each type of operation of excavators (digging, truck loading, breaking, etc.) by applying the MMO(multi-model optimization) technique.

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