Hexapod

昆虫

• 批准号: 457695441
• 金额: --
• 依托单位: Universität Rostock
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/457695441?language=en
• 关键词: Hexapod

The Chair of Ocean Engineering at the University of Rostock has a long-standing research expertise in areas such as underwater systems, fluid-structure-environmental interaction (hydrodynamics) and underwater sensor technology. One of the most important challenges in assessing any type of ocean technology is a comprehensive hydrodynamic analysis, i.e. the study of the interactions between wind, current, sea state and object to be deployed. Although many questions can be answered at least partially by means of numerical simulations, the execution of true-to-scale model tests, e.g. when it comes to seakeeping behaviour, is still inevitable.The use of a hexapod enables the implementation of a so-called "hardware-in-the-loop" system. By using a hexapod, an object is not directly examined whilst performing in waves. Rather, the seakeeping behavior of a structure is first approximated numerically, in order to then impose the determined motions onto the object itself or a model of it. This in turn allows dynamic effects and especially nonlinear hydrodynamic parameters to be determined, which are subsequently incorporated into improved numerical analyses and simulations. The use of a hexapod for the simulation of motions in 6 degrees of freedom thus offers in many ways a cost-effective alternative to the classic seakeeping basin with elaborate wave making technology.Also, for systems that are not exposed to waves, the hexapod, in conjunction with existing laboratories, offers completely new possibilities regarding the determination of dynamic fluid forces acting on fully or partially submerged systems. Such forces, as well as the associated hydrodynamic masses, damping and other coefficients of interest for objects undergoing forced motion sequences, cannot be investigated without the use of the hexapod. In addition, the portfolio of possible experiments is extended to include the investigation of highly complex, dynamic flow processes. In particular, the possibility of examining the flow as well as flow-induced forces during high-precision motion sequences while changing the flow direction is of paramount interest. In addition, fully automatic tests covering a wide range of relative positions between objects and flow, without having to temporary shutdown the wind tunnel are possible. As a result, the time required for testing is reduced whilst the quality of the measurement increases. Hence, test campaigns can be made much more efficient.The hexapod, in conjunction with the existing laboratory facilities of the chair, will significantly expand the experimental portfolio and thus opens up completely new perspectives with regards to innovative, future-oriented research in the field of ocean technology at the University of Rostock.

罗斯托克大学海洋工程系主任在水下系统、流体-结构-环境相互作用（流体动力学）和水下传感器技术等领域拥有长期的研究专业知识。评估任何类型的海洋技术最重要的挑战之一是全面的水动力分析，即研究风、海流、海况和待部署物体之间的相互作用。尽管许多问题至少可以部分地通过数值模拟得到解答，但执行真实比例的模型测试，例如当涉及适航行为时，仍然是不可避免的。六足机构的使用可以实现所谓的“硬件在环”系统。通过使用六足机构，在波浪中表演时不会直接检查物体。相反，首先对结构的耐波性能进行数值近似，然后将确定的运动施加到物体本身或其模型上。这反过来又可以确定动态效应，尤其是非线性流体动力学参数，随后将其纳入改进的数值分析和模拟中。因此，使用六足机构模拟 6 个自由度的运动，在许多方面为具有复杂造波技术的经典耐波盆地提供了一种经济高效的替代方案。此外，对于不暴露于波浪的系统，六足机构与现有实验室相结合，为确定作用于完全或部分浸没系统的动态流体力提供了全新的可能性。如果不使用六足位移台，就无法研究此类力以及相关的流体动力质量、阻尼和经历受迫运动序列的物体的其他相关系数。此外，可能的实验组合已扩展到包括高度复杂的动态流动过程的研究。特别是，在改变流动方向的同时检查高精度运动序列期间的流动以及流动引起的力的可能性是至关重要的。此外，可以进行覆盖物体和气流之间各种相对位置的全自动测试，而无需暂时关闭风洞。因此，测试所需的时间减少了，同时测量的质量提高了。因此，测试活动可以变得更加高效。六足机器人与椅子现有的实验室设施相结合，将显着扩大实验范围，从而为罗斯托克大学海洋技术领域的创新、面向未来的研究开辟全新的视角。