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±àÖ¯²ãµÄÖØÁ¿ÅÌËã:

1. ÏËά±àÖ¯²ãµÄÖØÁ¿ÅÌËã:

1) °´¸ùÊý¡¢¶§ÊýµÄÅÌËã·¨

    W=2a*n/N*sin¦Á         

ÆäÖУº2a¡ª±àÖ¯»ú¶§×Ó×ÜÊý           n¡ªÃ¿¸ö¶§×ÓµÄÏËά¸ùÊý        N¡ªÏËάºÅÊý                    

      sin¦Á¡ª±àÖ¯½ÇÕýÏÒ            N¡¢a¡¢n¡¢sin¦Á¡ªÆ¾Ö¤¹¤ÒյĻ®¶¨

BS±ê×¼ÖÐÌî³äϵÊý¼´±àÖ¯Ãܶȣº

 Ìî³äϵÊý=mnd/¦ÐD*£¨1+¦Ð2D2/L2£©1/2

ÆäÖУºm¡ª¶§×ÓÊý                    n¡ªÃ¿¸ö¶§×ÓÉ϶ÆÎýÍ­Ï߸ùÊý     L¡ª±àÖ¯½Ú¾à³¤¶È   mm

     d--¶ÆÎýÍ­ÏßÓÐÓÿí¶È  mm       D¡ª±àÖ¯½ÚÔ²Ö±¾¶   mm

 2)°´Íâ¾¶ºÍ±àÖ¯ÃܶÈÅÌËã·¨£º

   W=2.04*P1*n/N*1/¦Ä*¦Ð£¨D+¡÷£©  £¨kg/km£©

ÆäÖУºP1¡ªµ¥ÏòÅÅÁÐÃܶÈϵÊý       n¡ªÏËά¹ÉÊý                  ¡÷--µ¥Ãæ±»¸´ºñ¶È  mm  

     1/N¡ªµ¥¸ùÏËÎ¬ÖØ   kg/km     P¡ª±àÖ¯ÃÜ¶È                  N¡ªÏËάºÅÊý

     ¦Ä¡ª±àÖ¯ºóµ¥¸ùÉ´±»¸´¿í¶È  mm

 

±àÖ¯ÃܶÈPÓëµ¥ÏòÅÅÁÐÃܶÈP1µÄ»»Ëã       ±í19

 

P%

P1

P%

P1

P%

P1

99

0.9000

87

0.6394

75

0.5000

98

0.8586

86

0.6258

74

0.4901

97

0.8268

85

0.6127

73

0.4804

96

0.8000

84

0.6000

72

0.4708

95

0.7764

83

0.5877

71

0.4615

94

0.7550

82

0.5757

70

0.4523

93

0.7354

81

0.5641

69

0.4432

92

0.7171

80

0.5528

68

0.4343

91

0.7000

79

0.5417

67

0.4255

90

0.6837

78

0.5310

66

0.4169

89

0.6683

77

0.5704

65

0.4084

88

0.6536

76

0.5101

64

0.4000

2. ½ðÊô±àÖ¯²ãµÄÖØÁ¿ÅÌËã:

(1) °´¸ùÊý¡¢¶§ÊýÅÌËã·¨£º

  W=£¨¦Ð/4*d2*2a*n*r£©/sin¦Á   £¨kg/km£©

ÆäÖУºd¡ª½ðÊô˿ֱ¾¶   mm         r¡ª½ðÊôË¿±ÈÖØ   g/cm3      sin¦Á ¡¢2a¡¢n¡ªÍ¬Ç°

  W=2£¨D+d£©d*Y*0.90*K

ÆäÖУºK¡ª²»ÔȳÆÏµÊý  1.05        Y¡ª½ðÊôË¿±ÈÖØ  g/cm3            D¡ª±àÖ¯²ãÖ±¾¶   mm     

      d¡ª½ðÊô˿ֱ¾¶   mm

(2) °´Íâ¾¶ºÍ±àÖ¯ÃܶÈÅÌËã:

W=¦Ð2/2*d(D+2d)*P1*1.02*r=1.6P1*d*r*¦Ð(D+2d)

=5.03P1*d*r*(D+2d)    £¨kg/km£©

WÍ­=44.75*(D+2d)*d   £¨kg/km£©    W¸Ö=39.26*(D+2d)*d  £¨kg/km£©

ÆäÖУºD¡ª±à֯ǰֱ¾¶   mm        P1¡¢d¡¢r¡ªÍ¬Ç°

±àÖ¯ÃܶÈ: P=(2P1-P12)*100%

±àÖ¯µ¥ÅÅÃܶÈ: P1=a*n*d/(h*cos¦Á)

Ô²ÐÎ: ¦Á=tg-1 { h/[¦Ð(D+T) ]}

   ¶þоÍÖÔ²: ¦Á=tg-1 ( h/{2D+[¦Ð(D+T) ]} )

ÆäÖУºD¡ª±à֯ǰֱ¾¶   mm      d¡ªÏËά»ò½ðÊô˿ֱ¾¶   mm    h¡ª±àÖ¯½Ú¾à  mm

      a¡ª±àÖ¯ÕÀÊý  Îª±àÖ¯»ú¶§ÊýµÄÒ»°ë

(3) îø×°»òÆÁÕÏÍ­(¸Ö)´øµÄÖØÁ¿

   W=¦Ð£¨D+nt£©nt*r/£¨1+B%£©     £¨kg/km£©

ÆäÖУºD¡ª±à֯ǰֱ¾¶   mm     t¡ª¸Ö´øºñ¶È  mm     B%¡ª¼ä϶£¨Öصþ£©ÂÊ

      n¡ª²ãÊý                  r¡ª±ÈÖØ    g/cm3

       W¸Ö=49.01(D+2t)/(1+B%)     Ë«¸Ö´ø¼äÏ¶ÈÆ°ü


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