組合結構之有限元素模擬技術與模型驗證

Finite Element Modeling Techniques for Assembly Structures and Model Verification

王栢村(Bor-Tsuen Wang) ； 謝宗廷(Tsung-Ting Hsieh) ； 陳正陽(Cheng-Yang Chen) ； 周芳俊(Fang-Chun Chou)

《應用聲學與振動學刊》 5卷1期 (2013/06) Pp. 11-22

https://doi.org/10.6282/JASV.2013.5.1.02

摘要

有限元素分析已為工業界廣泛採用於產品設計，而有限元素模型之驗證與認證則是一個重要的課題，本文應用實驗模態分析於包含7個零組件的組合結構，進行模型驗證，說明執行模型驗證的原理與步驟。首先對每一個零組件進行驗證，透過實驗模態分析與有限元素分析所求得之模態參數相互驗證，然後再對螺栓接合之次組合結構建立有限元素模型，並驗證其等效性，最後對整體組合件結構，包含螺栓接合狀態及斜楔緊裝配，進行整體結構之驗證分析。結果顯示在不同層次的組合結構有限元素模型能有效模擬典型的工具機組合結構，如螺栓組合及斜楔緊裝配。本文闡述模型驗證的理念，並探討一個複雜多組合件結構的模型驗證之分析技術及實驗方法，可有效應用於其它工程結構之設計分析。

關鍵字

有限元素分析 ； 實驗模態分析 ； 模型驗證 ； 螺栓接合結構 ； 斜楔緊裝配 ； 驗證與認證

並列摘要

Finite element analysis (FEA) has been widely adopted for product design in industrial applications. The verification and validation (V & V) of FE model is a crucial and important issue. This work applies experimental modal analysis (EMA) to perform model verification on the assembly structures that consists of seven individual components. The principle and procedure in carrying out model verification is presented. Firstly, each component is validated by examining modal parameters obtained from both EMA and FEA. The bolt-jointed sub-assembly structure is then constructed and validated for the effectiveness of FE model. The final assembly structure that composes oblique blocks for tight fits and bolted conditions is considered. Results show the finite element models of the assembly structures in different assembly stages for simulating the bolted joints and tight fits with oblique blocks can be well validated. The finite element modeling techniques are effective in simulating the typical assembly structure for a machine tool. This work lays out the model verification concept and provides the case study on a complex assembly structure with multiple components. The analytical techniques as well as the experimental approaches can be useful and applied to other industrial applications.

並列關鍵字

Finite Element Analysis (FEA) ； Experimental Modal Analysis (EMA) ； Model Verification ； Bolt-Jointed Structure ； Oblique Block Tight Fit ； Verification and Validation (V & V)