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单选题
391.为什么发动机前、后吊点要分别传递推理和扭转载荷?( )Why the forward and aft mount can not transmits engine torque loads or thrust together?
A
以容许发动机热膨胀 To allow engine thermal expansion.
B
使发动机结构受力平衡 keep the loads balance of the engine structure.
C
满足习惯要求 meet custom required.
答案解析
正确答案：A
解析：
题目解析
为什么发动机前、后吊点要分别传递推理和扭转载荷?( )Why the forward and aft mounts cannot transmit engine torque loads or thrust together?
答案: A. 以容许发动机热膨胀 To allow engine thermal expansion.
解析: 发动机在运行过程中会受热而膨胀，如果前后吊点都传递推力和扭转载荷，发动机的热膨胀会导致受力不均匀，可能引起不必要的应力集中和结构损伤。因此，将推力和扭转载荷分别通过前后吊点传递，允许发动机在热膨胀时有足够的空间来自由膨胀，从而避免不均匀的载荷分布。
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