[go: nahoru, domu]

Jump to content

Editing Modal testing

You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to a username, among other benefits.
Content that violates any copyrights will be deleted. Encyclopedic content must be verifiable through citations to reliable sources.
Latest revision Your text
Line 20: Line 20:
For large civil engineering structures much larger shakers are used, which can have a mass of 100 [[kg]] and above, and are able to apply a force of many hundreds of [[newtons]]. Several types of shakers are common: rotating mass shakers, electrodynamic shakers, and electrohydraulic shakers. For rotating mass shakers, the force can be calculated by knowing the mass and the speed of rotation, while for electrodynamic shakers, the force can be obtained through a load cell or an accelerometer placed on the moving mass of the shaker. Shakers have an advantage over the impact hammer as they can supply more energy to a structure over a longer period of time. However, problems can also be introduced; shakers can influence the dynamic properties of the structure and can also increase the complexity of analysis due to [[window function|windowing]] errors.
For large civil engineering structures much larger shakers are used, which can have a mass of 100 [[kg]] and above, and are able to apply a force of many hundreds of [[newtons]]. Several types of shakers are common: rotating mass shakers, electrodynamic shakers, and electrohydraulic shakers. For rotating mass shakers, the force can be calculated by knowing the mass and the speed of rotation, while for electrodynamic shakers, the force can be obtained through a load cell or an accelerometer placed on the moving mass of the shaker. Shakers have an advantage over the impact hammer as they can supply more energy to a structure over a longer period of time. However, problems can also be introduced; shakers can influence the dynamic properties of the structure and can also increase the complexity of analysis due to [[window function|windowing]] errors.


==External links==
*[http://www.mpihome.com/pdf/soa_structural_dynamics_testing.pdf Structural Dynamics Testing/Modal Analysis]
*[http://www.pcb.com/techsupport/tech_hammers.php Impact Hammer Selection Guide]
*[http://www.lmsintl.com/modal-analysis A Brief Introduction to Modal Analysis]
==See also==
==See also==
*[[Modal Analysis]]
*[[Modal Analysis]]
By publishing changes, you agree to the Terms of Use, and you irrevocably agree to release your contribution under the CC BY-SA 4.0 License and the GFDL. You agree that a hyperlink or URL is sufficient attribution under the Creative Commons license.
Cancel Editing help (opens in new window)

Copy and paste: – — ° ′ ″ ≈ ≠ ≤ ≥ ± − × ÷ ← → · §   Cite your sources: <ref></ref>


{{}}   {{{}}}   |   []   [[]]   [[Category:]]   #REDIRECT [[]]   &nbsp;   <s></s>   <sup></sup>   <sub></sub>   <code></code>   <pre></pre>   <blockquote></blockquote>   <ref></ref> <ref name="" />   {{Reflist}}   <references />   <includeonly></includeonly>   <noinclude></noinclude>   {{DEFAULTSORT:}}   <nowiki></nowiki>   <!-- -->   <span class="plainlinks"></span>


Symbols: ~ | ¡ ¿ † ‡ ↔ ↑ ↓ • ¶   # ∞   ‹› «»   ¤ ₳ ฿ ₵ ¢ ₡ ₢ $ ₫ ₯ € ₠ ₣ ƒ ₴ ₭ ₤ ℳ ₥ ₦ № ₧ ₰ £ ៛ ₨ ₪ ৳ ₮ ₩ ¥   ♠ ♣ ♥ ♦   𝄫 ♭ ♮ ♯ 𝄪   © ® ™
Latin: A a Á á À à  â Ä ä Ǎ ǎ Ă ă Ā ā à ã Å å Ą ą Æ æ Ǣ ǣ   B b   C c Ć ć Ċ ċ Ĉ ĉ Č č Ç ç   D d Ď ď Đ đ Ḍ ḍ Ð ð   E e É é È è Ė ė Ê ê Ë ë Ě ě Ĕ ĕ Ē ē Ẽ ẽ Ę ę Ẹ ẹ Ɛ ɛ Ǝ ǝ Ə ə   F f   G g Ġ ġ Ĝ ĝ Ğ ğ Ģ ģ   H h Ĥ ĥ Ħ ħ Ḥ ḥ   I i İ ı Í í Ì ì Î î Ï ï Ǐ ǐ Ĭ ĭ Ī ī Ĩ ĩ Į į Ị ị   J j Ĵ ĵ   K k Ķ ķ   L l Ĺ ĺ Ŀ ŀ Ľ ľ Ļ ļ Ł ł Ḷ ḷ Ḹ ḹ   M m Ṃ ṃ   N n Ń ń Ň ň Ñ ñ Ņ ņ Ṇ ṇ Ŋ ŋ   O o Ó ó Ò ò Ô ô Ö ö Ǒ ǒ Ŏ ŏ Ō ō Õ õ Ǫ ǫ Ọ ọ Ő ő Ø ø Œ œ   Ɔ ɔ   P p   Q q   R r Ŕ ŕ Ř ř Ŗ ŗ Ṛ ṛ Ṝ ṝ   S s Ś ś Ŝ ŝ Š š Ş ş Ș ș Ṣ ṣ ß   T t Ť ť Ţ ţ Ț ț Ṭ ṭ Þ þ   U u Ú ú Ù ù Û û Ü ü Ǔ ǔ Ŭ ŭ Ū ū Ũ ũ Ů ů Ų ų Ụ ụ Ű ű Ǘ ǘ Ǜ ǜ Ǚ ǚ Ǖ ǖ   V v   W w Ŵ ŵ   X x   Y y Ý ý Ŷ ŷ Ÿ ÿ Ỹ ỹ Ȳ ȳ   Z z Ź ź Ż ż Ž ž   ß Ð ð Þ þ Ŋ ŋ Ə ə
Greek: Ά ά Έ έ Ή ή Ί ί Ό ό Ύ ύ Ώ ώ   Α α Β β Γ γ Δ δ   Ε ε Ζ ζ Η η Θ θ   Ι ι Κ κ Λ λ Μ μ   Ν ν Ξ ξ Ο ο Π π   Ρ ρ Σ σ ς Τ τ Υ υ   Φ φ Χ χ Ψ ψ Ω ω   {{Polytonic|}}
Cyrillic: А а Б б В в Г г   Ґ ґ Ѓ ѓ Д д Ђ ђ   Е е Ё ё Є є Ж ж   З з Ѕ ѕ И и І і   Ї ї Й й Ј ј К к   Ќ ќ Л л Љ љ М м   Н н Њ њ О о П п   Р р С с Т т Ћ ћ   У у Ў ў Ф ф Х х   Ц ц Ч ч Џ џ Ш ш   Щ щ Ъ ъ Ы ы Ь ь   Э э Ю ю Я я   ́
IPA: t̪ d̪ ʈ ɖ ɟ ɡ ɢ ʡ ʔ   ɸ β θ ð ʃ ʒ ɕ ʑ ʂ ʐ ç ʝ ɣ χ ʁ ħ ʕ ʜ ʢ ɦ   ɱ ɳ ɲ ŋ ɴ   ʋ ɹ ɻ ɰ   ʙ ⱱ ʀ ɾ ɽ   ɫ ɬ ɮ ɺ ɭ ʎ ʟ   ɥ ʍ ɧ   ʼ   ɓ ɗ ʄ ɠ ʛ   ʘ ǀ ǃ ǂ ǁ   ɨ ʉ ɯ   ɪ ʏ ʊ   ø ɘ ɵ ɤ   ə ɚ   ɛ œ ɜ ɝ ɞ ʌ ɔ   æ   ɐ ɶ ɑ ɒ   ʰ ʱ ʷ ʲ ˠ ˤ ⁿ ˡ   ˈ ˌ ː ˑ ̪   {{IPA|}}

Wikidata entities used in this page