Research On The Reliability Of Vertical Axis Wind Turbine Drive System

In the face of the modern high-speed development of the traffic industry,bridge structure has become an important building to ensure the safety,convenience and smooth travel of vehicles and pedestrians,and its safety problem is the focus of current research.In the construction and use of each stage,the scientific and effective analysis of the structure,evaluation and improvement of the reliability of the structure,can increase the service life of the structure,improve the use efficiency of the structure,save the later maintenance funds.Therefore,the necessary reliability analysis of the structure is helpful to the maintenance of the basic function of the structure.In order to make the reliability of the bridge structure system more consistent with the actual production and operation situation,this paper considers the influence of vehicle load and wind load on the structure of the bridge structure in daily use,and proposes the reliability algorithm of the structure changing with time under the random load.Therefore,this paper focuses on the reliability of the bridge system under random load to carry out the following work:(1)Load analysis of bridge structure.This paper mainly analyzes the vehicle load and the wind load which have a great influence on the bridge structure.The analysis of vehicle load equates the damage of different types of vehicles in the time segment to the bridge,and connects the obtained vehicle load to form the load spectrum.The analysis of wind load mainly transforms the basic wind speed into the basic wind pressure through the calculation of Bernoulli equation,and then obtains the wind load of the structure through the correction of other influencing factors such as ground roughness and geomorphologic features.(2)Dynamic analysis of bridge structure.Simulation model is established and modal analysis,get the inherent nature of bridge structure vibration,extract the typical model of the bridge during applying acquired vehicle load and wind load,and will receive the random load on the bridge of the bridge structure to analyze the transient,consider different direction of the wind load and vehicle load under the joint action of structure dynamic response,for the next bridge structure performance degradation and provide theoretical basis for reliability analysis.(3)Performance degradation and reliability analysis of bridge structure.According to the load analysis of load model and dynamic analysis of the dynamic response of the integrated use of s-n curve and rain flow count method by loading cycle and amplitude,and the load-resistance model of time-varying reliability calculation and analysis of the structure of the bridge,the results showed that the constant load,vehicle load and wind load of three load reliability analysis under the action of a more comprehensive and accurate result,the stability of wind load on the bridge.