The Fatigue Loads Spectrum Of Grid Structure With Bolt Sphere Joints

The fatigue load spectrum is a load-time process based on probability statistics to show the member's load character under every working condition and guarantee the statistics of load amplitude and its frequency. So, the fatigue spectrum is a basis for member fatigue design,fatigue life calculation,model experiment,strength analysis , calculation and reliability design. The fatigue development history is recalled and fatigue load spectrum dynamic situation in erevr fields is stated.Meanwhile, the type and parameter of motor hoisting and motor single suspending crane is is introducedThe theoretical load spectrum compiled by computer program C#,Matlab,SQL Server 2005 is the key and the fuction can be realized as follows:1 each page is easy to learn and has an advantage of network;2 it can compile the revelant curve.Finally, the right of program process is testified by model experiment.