如何打出薄薄的蛋花汤:摘要翻译

abstract：The mechanical fatigue ineffectiveness is the most important manner of ineffectiveness, thus the research of mechanical fatigue is mainly focused on the study of the mechanical fatigue ineffectiveness. So far it has two aspects, one of which is to choose the onloading program to carry on the fatigue tests according to the acquired stress-chart in laboratories or on text-beds, thus obtain the curve of б——N to analyze the property of the tested machine(material), and the other is to estimate the life-span of the machine though the analysis of the machine property , the stress-chart, and the Miner principle. The statistic of stress-chart is the key factor for both fatigue tests and fatigue life-span estimations.
Among the modern testing technologies, the application of computers to deal with the testing signals, which has become the symbol of modern testing technologies, takes advantages of A/D switching board to sample the data of the output signals of the sensors to work out the digital signals, then input them to computers deal with the digital signals using the compiled corresponding programs.
The main measure of the stress-chart statistic at present is the rain-flow method. But when processing the statistic, the traditional rain-flow method will divide the signals at the point of the max and the minimum and join the two sections from the beginning to the end, then the rain-flow method can be take. Using this method we should beginning to processing when we finish the signal collection, thus the time for text is so long that we need to store the data in a large storage space, which brings some inconvenience for the tests. Through the improvement of the rain-flow model, we can begin to process the method when sampling, and delete the counting points conforming to the counting conditions, in addition, we can see the rough stress-chart while experimenting and acquire the intact stress-chart after the experiment.

Mechanical fatigue failure is the main failure mode mechanical failures, mechanical failures on the main study is mechanical fatigue failure. Currently, mechanical fatigue failure research has two aspects : First, according to derive the payload type procedures to determine inclusion in the laboratory or pilot platform for the mechanical fatigue testing, drawn machinery (material) 4,020,000 --N curve analysis machinery (material) identity; 2 is based on mechanical (material) with a payload of spectral characteristics and criteria used to estimate Miner mechanical fatigue life. Fatigue testing is done or whether the estimated fatigue life, the statistics are critical load spectrum. In modern testing technology, computer applications to address test signal is the hallmark of modern testing technologies, the use of sensors will A/D conversion boards for digital signal output sampling produce digital signals, digital signals into a computer, using the preparation of the corresponding procedures for dealing with digital signals.

Currently in the field of statistical mechanical methods is the main payload type stormwater flow count law. But traditional stormwater flow count law in the time required to load the statistical signals from the highest minimum at around or punishment opened, and two for head and tail docking can only count for stormwater flow law. China needs to use this method of collecting End signals can be handled in the lengthy trial, the need for flood storage space to store data brought to the test of inconvenience. Through stormwater flow model law incalculable improvement in the sampling time to start counting stormwater flow France will meet the conditions of point count deleted without affecting the remaining points, and in tests also can be seen in the load board, the pilot in the end, able to quickly derive complete load range.