3 results about "Scale effect" patented technology

The invention provides a method for constructing a bearing test distortion model of an ice-resistant structure under the action of a dynamic ice load, and belongs to the field of test similar reduced scale model design under an ice breaking load of the ice-resistant structure. The problem that in the prior art, the strain rate of a fully-similar model is dissimilar due to the scale effect is solved; a traditional distortion model design method has the problem of dissimilar energy distribution. The method comprises the following steps: establishing a fully similar model from an ice-resistant structure prototype to a geometric and plate thickness equal ratio reduced scale; establishing a plate thickness distortion reduced scale model by using the same material on the basis of the geometric similar reduced scale model; preliminarily determining a collision contact position of the thickness distortion reduced scale model; a dynamic ice load similarity criterion is applied, correction factors are deduced through dimensional analysis, and ice body parameters and collision speed of a distortion model system are adjusted, so that the ice breaking capacity and dynamic structure response are similar to those of a prototype system. The device is mainly used in the field of polar region icebreaking.

The application provides a kind of floating wind turbine physical-numerical mixed scale model test method, belongs to offshore wind power generation technical field, the test method will floating wind turbine modeling into two parts of physical model and numerical model, in addition to physical model and numerical model, test platform also includes measurement system and loading system;Real-time interaction is carried out between the measured signal of measurement system and the calculation result of numerical model by computer, signal loading is realized by loading system, and the construction and closed-loop control of hybrid test platform are realized.Finally, the required information is monitored and extracted through the visual interface.The application can not only accurately capture the performance of the dynamic response of the key structure, but also solve a series of problems such as scale effect, incompatibility of scale rule caused by scale effect and difficulty in simulating indoor test of offshore floating wind turbine.

The invention relates to the technical field of landscape pattern analysis, and discloses a simulation and prediction method for space-time evolution of an island ecosystem landscape pattern based on a scale effect, which is used for improving the accuracy of a simulation result. The simulation and prediction method for the space-time evolution of the island ecosystem landscape pattern based on the scale effect comprises the following steps: acquiring and preprocessing a multi-temporal remote sensing image; extracting landscape type data of each time phase through object-oriented classification; performing scale effect analysis to determine the most suitable spatial granularity; calculating landscape pattern indexes of the whole island group and each single island based on the granularity to obtain space-time evolution characteristics; identifying a driving factor of pattern change by using a grey correlation analysis method; and finally, in combination with landscape type data and a driving force analysis result, a future landscape pattern is obtained through simulation prediction.