Applications of DSP to Explicit Dynamic FEA Simulations of Elastically-Dominated Impact Problems
Explicit Dynamic Finite Element techniques are increasingly used for simulating impact events of personal electronic devices such as portable phones and laptop computers. Unfortunately, the elastically-dominated impact behavior of these devices greatly increases the tendency of Explicit Dynamic meth...
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| Format: | Article |
| Language: | English |
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Wiley
2000-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2000/931351 |
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| _version_ | 1832563418173800448 |
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| author | Ted Diehl Doug Carroll Ben Nagaraj |
| author_facet | Ted Diehl Doug Carroll Ben Nagaraj |
| author_sort | Ted Diehl |
| collection | DOAJ |
| description | Explicit Dynamic Finite Element techniques are increasingly used for simulating impact events of personal electronic devices such as portable phones and laptop computers. Unfortunately, the elastically-dominated impact behavior of these devices greatly increases the tendency of Explicit Dynamic methods to calculate noisy solutions containing high-frequency ringing, especially for acceleration and contact-force data. For numerous reasons, transient FEA results are often improperly recorded by the analyst, causing corruption by aliasing. If aliasing is avoided, other sources of distortion can still occur. For example, filtering or decimating Explicit Dynamic data typically requires extremely small normalized cutoff frequencies that can cause significant numerical problems for common DSP programs such as MATLAB. This paper presents techniques to combat the unique DSP-related challenges of Explicit Dynamic data and then demonstrates them on a very challenging transient problem of a steel ball impacting a plastic LCD display in a portable phone, correlating simulation and experimental results. |
| format | Article |
| id | doaj-art-36db2917f6af48c3a518818f41c83fc3 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2000-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-36db2917f6af48c3a518818f41c83fc32025-02-03T01:20:14ZengWileyShock and Vibration1070-96221875-92032000-01-017316717710.1155/2000/931351Applications of DSP to Explicit Dynamic FEA Simulations of Elastically-Dominated Impact ProblemsTed Diehl0Doug Carroll1Ben Nagaraj2Mechanical Technology Center, PCS, Motorola, 8000 W. Sunrise Blvd., Fort Lauderdale, FL 33322, USAAdvanced Technology, Smart and Connected Products, Motorola, 1500 Gateway Blvd., Boynton Beach, FL 33426, USAMechanical Technology Center, PCS, Motorola, 8000 W. Sunrise Blvd., Fort Lauderdale, FL 33322, USAExplicit Dynamic Finite Element techniques are increasingly used for simulating impact events of personal electronic devices such as portable phones and laptop computers. Unfortunately, the elastically-dominated impact behavior of these devices greatly increases the tendency of Explicit Dynamic methods to calculate noisy solutions containing high-frequency ringing, especially for acceleration and contact-force data. For numerous reasons, transient FEA results are often improperly recorded by the analyst, causing corruption by aliasing. If aliasing is avoided, other sources of distortion can still occur. For example, filtering or decimating Explicit Dynamic data typically requires extremely small normalized cutoff frequencies that can cause significant numerical problems for common DSP programs such as MATLAB. This paper presents techniques to combat the unique DSP-related challenges of Explicit Dynamic data and then demonstrates them on a very challenging transient problem of a steel ball impacting a plastic LCD display in a portable phone, correlating simulation and experimental results.http://dx.doi.org/10.1155/2000/931351 |
| spellingShingle | Ted Diehl Doug Carroll Ben Nagaraj Applications of DSP to Explicit Dynamic FEA Simulations of Elastically-Dominated Impact Problems Shock and Vibration |
| title | Applications of DSP to Explicit Dynamic FEA Simulations of Elastically-Dominated Impact Problems |
| title_full | Applications of DSP to Explicit Dynamic FEA Simulations of Elastically-Dominated Impact Problems |
| title_fullStr | Applications of DSP to Explicit Dynamic FEA Simulations of Elastically-Dominated Impact Problems |
| title_full_unstemmed | Applications of DSP to Explicit Dynamic FEA Simulations of Elastically-Dominated Impact Problems |
| title_short | Applications of DSP to Explicit Dynamic FEA Simulations of Elastically-Dominated Impact Problems |
| title_sort | applications of dsp to explicit dynamic fea simulations of elastically dominated impact problems |
| url | http://dx.doi.org/10.1155/2000/931351 |
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