悬索桥建模助手生成模型进行修改后无法收敛，求高手指点
出现如下提示-S T A R T I N G S O L U T I O NMULTI-FRONTAL SOLVER
AVAILABLE MEMORY = 1400.0 MBYTES
ENTRY PHASE FOR RENUMBERING
ENTRY NUMBERING_EQN
ENTRY FORM_STIFF_MASS_LOAD
THE INDIVIDUAL ELEMENT STIFFNESS AND LOAD MATRICES WILL NOW BE FORMED.
ELEMENT NO. : 348OF 348
ENTRY SOLUTION PHASE
SUSPENSION BRIDGE EQUILIBRIUM STATE ANALYSIS
WARNING : NODE NO. 290RZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 556
WARNING : NODE NO. 30DXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 83
WARNING : NODE NO. 30DYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 84
WARNING : NODE NO. 30DZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 85
WARNING : NODE NO. 290DZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 553
WARNING : NODE NO. 290DYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 552
WARNING : NODE NO. 290DXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 551
WARNING : NODE NO. 160DZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 276
WARNING : NODE NO. 160DYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 275
NONLINEAR STATIC LOADCASE : 1
INCREMENT NO. : 1ITERATION NO. : 1 DISPL. NORM : 0.100E+01
CABLE ELEMENT CONVERGENCE FAILURE 1 CHANGE ELEMENT TYPE CABLE -> TRUSS
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ERRORS ENCOUNTERED.MIDAS JOB TERMINATED. REFER TO .OUT FILE
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