Research On Interval Factor Method Of Structural Static/Dynamic Analysis With Interval Parameters

There are many uncertain factors in engineering structures. As these factors can be expressed as interval parameters, they can be studied by using interval analysis method. This paper put forward interval factor method to study structural static/dynamic analysis with interval parameters. The structural interval parameters can be expressed as the product of two parts corresponding to the interval factors and the deterministic value. Then, study and analyze the structural problems with the functions of the interval factors. As for structural static analysis, the structural displacement and stress can be mainly studied. This paper has studied the response of displacement on plane truss and freely supported beam structure. Analyze interval variance ratios of 3D truss structural parameters, and result shows that interval variance ratio of structure accordingly affect structural displacement and stress. Interval factor can be used in structural dynamic characteristics. Have computed structural natural frequency and mode of vibration of plane truss and 3D antenna and analyzed the effect of variance ratios with interval parameters on ones of structural natural frequency and mode of vibration. Have studied dynamic analysis of socle beam structure and undamped-free vibration system. Natural frequency and mode of vibration computed have a comparison between interval and certain parameters on diagram about structural mode of vibration. What have studied indicates that interval factors of structural parameters have accordingly affected structural static/dynamic characteristics. Interval factor method is effective and feasible on the study of engineering problems.