±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 192  |  »Ø¸´: 1
µ±Ç°Ö÷ÌâÒѾ­´æµµ¡£

likefeng

½ð³æ (ÕýʽдÊÖ)

[½»Á÷] ·­ÒëÇóÖú

The additive loading includes among others the product of the harmonic components cos(wt)  and cose( t),see Eq.(B.1).It turns out that the response period is determined from the interference of the response caused by the circular frequencies w0+  and w0-  .The corresponding periods become T=2pi/ w0+ ,T=2pi/ w0-  .
In order to find the combined period of the response T the following ratios are evaluated T/w=n(1+2/w).  The factor n is found as the minimum value at which both T tand T1 attain integer values.Poincare¡ämaps of 2000 excitation periods are plotted in Fig.3 for various ratios of w0/ .=0.8.The amplitude is u0=0:3 m, the damping ratios c1=c2=1 and the frequency ratio w0/w1=2 Tindicate the phase value  ,every excitation period T0,andeTindicates the phase value at every response period T.As seen the period tends towards infinity as w0/ .becomes irrational.As an example w0/=3:14159 results in n=314 159. For an irrational frequency ratio a so-called almost periodic response is achieved in which case a continuous closed curve is obtained in the phase plane for the Poincare¡ämap.As seen from Fig.3 the amplitude of q1 increases as w0/ . is increased.The reason is that the fundamental blade circular eigenfrequency for the considered example is given as w0/ .=3:2125.Hence,the simulations tend towards resonance in the fundamental eigenmode as w0/ . is increased.
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zw0912

½ð³æ (ÕýʽдÊÖ)

ÎÞΪÔòÎÞ²»Îª

¡ï
likefeng(½ð±Ò+1,VIP+0):ʵÔÚÊDzîÔ¶ÁË £¬²»¹ýлл 4-22 09:08
ÔØÈëÖаüÀ¨Ìí¼Ó¼ÁµÈ²úÆ·µÄг²¨³É·Ö²úµØÀ´Ô´Ö¤£¨ÖØ£©ºÍÆÏÌÑÌÇ£¨¶Ö£© £¬¼û¾ùºâÆ÷¡£ £¨ B.1½Ú£© ¡£½á¹û±íÃ÷£¬¸Ã·´Ó¦ÆÚ¼äÈ·¶¨µÄ¸ÉÈÅËùÔì³ÉµÄ·´Ó¦Í¨º¯ÆµÂÊw0 +ºÍw0 - ¡£ÏàÓ¦ÆÚ¼ä³ÉΪŤ = 2pi / w0 + £¬ Ť = 2pi / w0 - ¡£

ΪÁËÕÒµ½ºÏ²¢ÆÚ¼äµÄ·´Ó¦ŤÒÔϱÈÂÊÆÀ¼ÛŤ / WÐÍΪN £¨ 1 +2 / WÐÍ£© ¡£Òò×ÓnÊÇ·¢ÏÖµÄ×îµÍÖµ¶¼ÔÚ±í t1 Ť tandʵÏÖÕûÊývalues.Poincare 'µØÍ¼¼¤·¢ÆÚ¼äµÄ2000ÄêÔÚͼ»æÖƸ÷ÖÖ±ÈÀýw0 / .= 0.8.TheÕñ·ùu0 = 0ʱ03·ÖÄУ¬×èÄá±ÈµÄC1 = c2 = 1ºÍƵÂʱÈw0/w1 = 2 Tindicate¼ÛÖµµÄ½×¶Î£¬Ã¿Ò»¸ö¼¤·¢ÆÚ¼äT0·ÖÀëÐÔ£¬ andeTindicatesµÄ¼ÛÖµÔÚÿһ¸ö½×¶ÎµÄ·´Ó¦¿ÉÒÔ¿´³öÆÚ¼ä¶ÖÆÚ¼äÇ÷ÓÚÎÞÇî×÷Ϊw0 / ¡£³ÉΪirrational.AsÒ»¸öÀý×Ów0 / = 3:14159½á¹ûÔÚN = 314 159 ¡£¶ÔÓÚ²»ºÏÀíµÄƵÂʱÈËùν¸ÅÖÜÆÚµÄ·´Ó¦ÊÇÔÚÕâÖÖÇé¿öÏ£¬ÊµÏÖÁ¬Ðø·â±ÕÇúÏßÖлñµÃÏàÆ½ÃæµÄPoincare'map ¡£ÕýÈç´Óͼ3µÄÕñ·ùΪw0Ôö¼Ó1¼¾¶È/ ¡£ÊÇÔö´óµÄÔ­ÒòÊÇ»ù±¾µ¶Æ¬Ô²ÐÎÆµÂÊΪÉóÒéʵÀý×÷Ϊw0 / .= 3:2125 ¡£Òò´Ë£¬Ä£ÄâÇãÏòÓÚÔö¼Ó¹²ÕñµÄ¸ù±¾Õñ×÷Ϊw0 / ¡£
·­µÃºÜÂÒ£¬Ï£ÍûÂ¥Ö÷¼ûÁÂ
ÐÞÉí¡¢ÐÞÐÄ¡¢Ð޵¡¢ÐÞÖÇ
2Â¥2009-04-21 19:24:57
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ likefeng µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] Çóµ÷¼Á +18 111623 2026-04-04 20/1000 2026-04-06 00:35 by T¿É¿ÉÎ÷ÀïT
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +14 Ò¼·¡·¡ÒÚ 2026-04-04 14/700 2026-04-05 23:31 by À´¿´Á÷ÐÇÓê10
[¿¼ÑÐ] Çóµ÷¼Á +11 ÐܶþÏëÉϰ¶ 2026-04-04 11/550 2026-04-05 22:21 by ×íÎÌwl
[¿¼ÑÐ] 085600£¬320·ÖÇóµ÷¼Á +7 ´ó²öС×Ó 2026-04-01 8/400 2026-04-05 21:19 by ѧԱ8dgXkO
[¿¼ÑÐ] Ò»Ö¾Ô¸ ÄϾ©º½¿Õº½Ìì´óѧ £¬080500²ÄÁÏ¿ÆÑ§Ó빤³Ìѧ˶ +10 @taotao 2026-03-30 10/500 2026-04-05 17:57 by jj987
[¿¼ÑÐ] 358Çóµ÷¼Á +7 Çïgk 2026-04-04 7/350 2026-04-05 13:29 by huangmoli
[¿¼ÑÐ] ¹¤¿Æ277·ÖÇóµ÷¼Á²ÄÁÏ +8 ÉÏÁËÉÏÁËÉÏŶ 2026-04-05 9/450 2026-04-05 13:05 by wwytracy
[¿¼ÑÐ] 290Çóµ÷¼Á085701 +10 1314Åõ»¨ 2026-04-02 10/500 2026-04-05 10:19 by Sealedwind
[¿¼ÑÐ] 11408,335·Ö£¬±¾¿Æ211£¬Çóµ÷¼Á£¬¿Éתרҵ +5 öùÀæ´óöùÓã 2026-04-03 5/250 2026-04-04 22:49 by chongya
[¿¼ÑÐ] 325Çóµ÷¼Á +4 ´º·ç²»½èÒâ 2026-04-04 4/200 2026-04-04 22:08 by à£à£à£0119
[¿¼ÑÐ] »·¾³285·Ö£¬¹ýÁù¼¶£¬Çóµ÷¼Á +10 xhr12 2026-04-02 10/500 2026-04-04 21:53 by bn53987
[¿¼ÑÐ] 331Çóµ÷¼Á +3 niby 2026-04-02 3/150 2026-04-04 19:56 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 265Çóµ÷¼Á +20 ÁºÁºÐ£Ð£ 2026-04-01 21/1050 2026-04-04 00:38 by userper
[¿¼ÑÐ] 322Çóµ÷¼Á +6 FZAC123 2026-04-03 6/300 2026-04-03 22:23 by ¿ÆÑÐСר¼Ò
[¿¼ÑÐ] 320µ÷¼Á +4 ũҵ¹¤³ÌÓëÐÅÏ¢¼ 2026-04-03 4/200 2026-04-03 21:40 by lbsjt
[¿¼ÑÐ] ±§Ç¸ +5 ÌïºéÓÐ 2026-03-30 5/250 2026-04-03 10:24 by linyelide
[¿¼ÑÐ] Çóµ÷¼Á£¡ÉúÎïÓëҽҩר˶ +4 Äæ×ªÂ½ÏÈÉú 2026-04-01 5/250 2026-04-03 08:33 by Jaylen.
[¿¼ÑÐ] ѧ˶»¯Ñ§¹¤³ÌÓë¼¼Êõ£¬Ò»Ö¾Ô¸Öйúº£Ñó´óѧ320+Çóµ÷¼Á +8 ÅûÐÇºÓ 2026-04-02 8/400 2026-04-02 14:12 by oooqiao
[¿¼ÑÐ] 282Çóµ÷¼Á +13 ºôÎü¶¼ÊǼõ·Ê 2026-04-01 13/650 2026-04-02 14:10 by baoball
[¿¼ÑÐ] ²ÄÁÏÓ뻯¹¤£¨0856£©304ÇóBÇøµ÷¼Á +8 Çñgl 2026-03-30 16/800 2026-04-01 17:58 by Çñgl
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û