用HyperMesh前处理，导出到Ls-Dyna，计算出现的Error

*** Error segment normals sum to zero at interface
node number 2343671 check segment orientation.
related to this node.
*** Error segment normals sum to zero at interface
node number 2367105 check segment orientation.
related to this node.
*** Error segment normals sum to zero at interface
node number 2434354 check segment orientation.
related to this node.
*** Error segment normals sum to zero at interface
node number 2434464 check segment orientation.
related to this node.
请大侠帮忙看看，如何解决，谢谢！