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ÈçͼËùʾ, ±ß³¤ÎªL¡¢µç×èΪRµÄÕý·½ÐθÕÐÔµ¼ÌåÏßȦabcd, ˮƽµØ·ÅÖÃÔڴŸÐӦǿ¶ÈΪBµÄбÏòÉϵÄÔÈÇ¿´Å³¡ÖÐ, ´Å³¡·½ÏòÓëˮƽµÄ¼Ð½ÇΪ37¡ã, ´Å³¡ÇøÓò×ã¹»´ó. ÏÖÒÔÏßȦµÄad±ßΪÖáʹÏßȦÒÔ²»±äµÄ½ÇËÙ¶ÈwÄæʱÕëÐýת90¡ã½Ç, Çó: (1) Ö¸³ö´Ë¹ý³Ì¸ÐÓ¦µçÁ÷µÄ·½Ïò, ²¢Çó³ö¸ÐÓ¦µç¶¯ÊƵÄƽ¾ùÖµ. (2) ´Ë¹ý³Ìͨ¹ýÏßȦºá½ØÃæµÄµçºÉÁ¿. (3) ´Ë¹ý³ÌÖÐbc±ßÊܵ½µÄ°²ÅàÁ¦µÄ×î´óÖµ.
(1) ¸ÐÓ¦µçÁ÷·½Ïò: abcda .
¹ý³Ìƽ¾ù¸ÐÓ¦µç¶¯ÊÆ
(2) ͨ¹ýÏßȦºá½ØÃæµÄµçºÉÁ¿ Q =
(3)
¹ý³Ìƽ¾ù¸ÐÓ¦µç¶¯ÊÆ
(2) ͨ¹ýÏßȦºá½ØÃæµÄµçºÉÁ¿ Q =
(3)
(1) ¸ÐÓ¦µçÁ÷·½Ïò: abcda .
ÏßȦÄæʱÕëÐýת90¡ã¹ý³Ì, ´ÅͨÁ¿±ä»¯Á¿ËùÓÃʱ¼ä
Df = Bcos37¡ã¡ÁL2 + Bsin37¡ã¡ÁL2=
Dt =
´Ë¹ý³Ìƽ¾ù¸ÐÓ¦µç¶¯ÊÆ
(2) ͨ¹ýÏßȦºá½ØÃæµÄµçºÉÁ¿ Q =
(3) µ±ÏßȦƽÃæÓë´Å¸ÐÏßƽÐÐ, ¸ÐÓ¦µçÁ÷×î´ó, bc±ßËùÊܵݲÅàÁ¦Ò²×î´ó.
Em = BL¡ÁwL = BwL2
bc±ßËùÊܵÄ×î´ó°²ÅàÁ¦
ÏßȦÄæʱÕëÐýת90¡ã¹ý³Ì, ´ÅͨÁ¿±ä»¯Á¿ËùÓÃʱ¼ä
Df = Bcos37¡ã¡ÁL2 + Bsin37¡ã¡ÁL2=
Dt =
´Ë¹ý³Ìƽ¾ù¸ÐÓ¦µç¶¯ÊÆ
(2) ͨ¹ýÏßȦºá½ØÃæµÄµçºÉÁ¿ Q =
(3) µ±ÏßȦƽÃæÓë´Å¸ÐÏßƽÐÐ, ¸ÐÓ¦µçÁ÷×î´ó, bc±ßËùÊܵݲÅàÁ¦Ò²×î´ó.
Em = BL¡ÁwL = BwL2
bc±ßËùÊܵÄ×î´ó°²ÅàÁ¦
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