对于变截面支腿，用力法计算平面框架内力时要先计算折算惯性矩。
For supporting leg with varying cross section, it is necessary to calculate equivalent inertia moment prior to calculating internal force of plane frames.
本文以该框架为指导，本着理论与实践统一的基本立意，应用SLP法，实现了发动机车间平面布局的优化；
Directed by this frame and based on the unification of theory and practice, the planar engine workshop layout is optimized by using SLP;
本文以该框架为指导，本着理论与实践统一的基本立意，应用SLP法，实现了发动机车间平面布局的优化；
Directed by this frame and based on the unification of theory and practice, the planar engine workshop layout is optimized by using SLP;
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