引用本文: 刘永军. 几何构造分析中关于定向支座的四个辅助规则. 力学与实践, 2023, 45(3): 684-688.
Liu Yongjun. Four auxiliary rules for directional support in geometrical construction analysis of structures. Mechanics in Engineering, 2023, 45(3): 684-688.
 Citation: Liu Yongjun. Four auxiliary rules for directional support in geometrical construction analysis of structures. Mechanics in Engineering, 2023, 45(3): 684-688.

## FOUR AUXILIARY RULES FOR DIRECTIONAL SUPPORT IN GEOMETRICAL CONSTRUCTION ANALYSIS OF STRUCTURES

• 摘要: 几何构造分析是结构力学课程的重要基础内容。通常，几何构造分析要采用三个基本规则和一些辅助规则来进行。考虑到定向支座(双链杆支座)是结构力学中的一种常见支座，因此，本文提出四个与定向支座相关的辅助规则。在这四个辅助规则配合下，很多含有定向支座结构的几何构造分析过程变得清晰、简捷。文中给出五个算例，证明关于定向支座的四个辅助规则易懂、有效。

Abstract: Geometrical construction analysis is an essential and fundamental topic in structural mechanics. In general, geometrical construction analysis is conducted using three basic geometrical construction rules and some auxiliary rules. Considering that directional support (or double-link support) is a common support in structural mechanics, four auxiliary rules related to directional support are proposed in this paper. With the assistance of these four auxiliary rules, the geometric construction analysis process of many structures with directional supports becomes clear and simple. Five examples are given to prove that the four auxiliary rules for directional support are easy to understand and effective.

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