Based on the variable stiffness elastic principle, completed three series of variable stiffness elastic suspension system design for the ocean pipe laying tensioners, effectively improved the clamping ability of the tensioner when the local pipe diameter is changing, and improved the overall stress environment of the tensioner. Established non-linear mathematical model and got the impact of instant response and response force by using the Matlab software.
As one of the main reason of fatigue failure, vibration has received more attention in reliability and comfort research on vehicles. The shock from bumpy roads has a great impact to the fatigue of vehicle parts and components. The method of survey user conditions is described for the road test in the article, and three accelerating data of X, Y, Z directions of a vehicle left shaft position have been obtained with the typical user condition. Through studied the data, we have obtained the load spectrum and the power spectral density data of one car. The obtained quantitative results from the analysis can be used for evaluating the comfort of using vehicle.
Unlike ordinary plate air preheater, the new dual-plate air preheater can generate temperature gradient through adding another plate in cold side to maintain certain space. And it can decrease the temperature of hot fluid in the outlet while increasing the temperature of plate surface to achieve the purpose of anti-corrosion.
Different from the traditional method of preventing low temperature corrosion, heat exchanger with dual-plate structure change structure of plate heat exchanger and can decrease the temperature of hot gas in the outlet while increasing wall temperature to achieve the purpose of preventing low temperature corrosion.
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