Equivalent Duffing System Method of Nonlinear System Dynamic Reliability Analysis |
| |
Authors: | ZHANG Zhenhao and YANG Weijun |
| |
Institution: | School of Civil Engineering and Architecture, Changsha University of Science and Technology, Changsha 410076, China;School of Civil Engineering and Architecture, Changsha University of Science and Technology, Changsha 410076, China |
| |
Abstract: | Equivalent linear system method is the main method of nonlinear structural system random response analysis. While it would generate big error when the results of equivalent linear system method are used to analyze the structural dynamic reliability. Through minimum mean square error principle, general nonlinear system was converted to equivalent Duffing nonlinear system, based on which the structural dynamic reliability was analyzed. The accurate steady state analytic solution of Duffing nonlinear system can be worked out by FPK equation, so it is not only convenient but also accurate to analyze structural dynamic reliability by using the equivalent nonlinear system method. It is also shown that the analysis results of equivalent nonlinear system method presented here is reliable and the calculation accuracy is higher than equivalent linear system method apparently through the example analysis. |
| |
Keywords: | nonlinear system dynamic reliability equivalent Duffing nonlinear system random vibration response |
|
| 点击此处可从《保鲜与加工》浏览原始摘要信息 |
| 点击此处可从《保鲜与加工》下载免费的PDF全文 |
|