Mechanical Engineering Toolkit vs 力学计算器

Mechanical Engineering Toolkit is a professional engineering calculator for students, researchers, and practicing engineers. Choose a formula, enter your variables, and get instant results — with calculation steps, formulas, diagrams, and unit conversions shown along the way. Switch between SI and Imperial units anytime, save favorites, and find the right tool fast with recommendations by major. Save your inputs as named projects, and export any result as text, image, CSV or PDF. Categories and tools: Mechanics of Material • Moments of inertia of plane areas • Force-displacement relation of a bar • Torsion formula and angle of twist • Flexure formula of a beam • Transverse shear stress • Deflections and slopes of cantilever and simple beams • Plane stress transformation and Mohr's circle • Principal stresses and planes • Spherical shell and thin-walled pressure vessel stresses • Buckling load of a column • Thermal deformation and stress • Combined loading • Bolted / riveted joints • Fatigue safety factor • Shaft power and torque Statics • Centroid of an area • Resultant of a force system • Beam reactions • 2D truss analysis Machine Design • Helical compression springs • Spur gear geometry and stresses • Shaft fatigue design (DE-Goodman) • Bearing L10 life • Belt and chain drives • Bolt preload / torque-tension • Fillet weld strength • Press / shrink-fit interference • Shaft critical speed (Dunkerley) • Beam natural frequency (five end conditions) • Torsional natural frequency (one or two rotors) Fluids & Thermal • Reynolds number and flow regime • Pipe pressure drop (Darcy-Weisbach with Colebrook) • Pump and fan power • Composite wall conduction • Fin efficiency • Heat exchanger sizing by LMTD Theory of Elasticity • Constitutive relation of linear elastic material • Stress/strain of linear elastic material Composite Material • Lamina and laminate stress/strain • Lamina engineering constants • Laminate plane and 3D properties • Rule of mixtures • Failure criteria (Tsai-Hill, Tsai-Wu) Reference Tables • Drill & tap chart (metric and imperial thread series) • ISO 286 fits & tolerances • Standard sections (AISC W, IPE, HEB) • Unit converter No account required. Works offline. Available in English, Chinese, German, French, and Japanese.

单跨梁是梁的一种较为简单和基本的结构形式，就是两端各有一个位移约束点的梁，应用非常广泛。单跨梁主要有5种形式，即悬臂梁、简支梁、一端简支一端固定梁、两端固定梁和伸臂梁。 单跨梁主要承受弯矩，属于弯效结构，故尽量减小单跨梁的竖向弯矩是单跨梁研究的主要问题。合理的造型能够减小梁的弯矩，使其充分发挥其材料性能。 《力学计算器—简支梁》是力学计算器APP系列中的一款计算器，可用于一般的工程师结构力学计算，或者材料力学等学习时参考求解，有如下特点： 1.按上述5种类型，收录了50多种典型、常用的单跨梁结构 2.可以按梁的结构形式输入所需参数，自动计算出结果 3.每种梁的结构形式精心录入对应的计算公式、参数说明和力及变形正负号说明，便于对照学习