varignon's theorem engineering mechanics

The 24th Spring of the National Open University, Civil Engineering Mechanics (This), Form Examination Homework 4 mainly included the following contents: ##1. Multiple-choice questions (3 points for each question, 30 points in total) 1. In the calculation of displacement method, the positive bending moment at the end of the bar is to make the lower side of the beam pull. 2. The coefficient in the typical equation of the displacement method represents the constraint reaction force in the ith additional constraint generated on the basic system. 3. The number of basic unknowns of the displacement method and the number of basic unknowns when solving the structure with the displacement method needed to be analyzed and judged according to the specific structural diagram. 4. The free term in the structural displacement equation, the fixed-end bending moment of the single-span indeterminate beam, and the distributed bending moment were calculated by the corresponding calculation formula in combination with the structural characteristics. The distributed bending moment was the bending moment of the B-end produced when the A-end rotated. 5. In the moment distribution method, the transfer coefficient C is related to the remote support; the unbalanced moment of the continuous beam node B needs to be calculated according to the relevant load and structural conditions. In general, the unbalanced moment of the node is always equal to the sum of the fixed end bending moments of the node. ##2. True or False Questions (3 points per question, 30 points in total) 1. The basic unknown quantity of the displacement method was related to the number of indeterminate times, but the displacement method could calculate the static structure, so this statement was wrong. 2. The basic structure of the displacement method was a hyperstatic structure, which was correct. 3. If the reaction force (moment) in the additional constraint of the basic system of the displacement method was equal to zero, then the basic system was consistent with the original structure, so the original statement was wrong. 4. The free term in the typical equation of the displacement method was the reaction force on the additional constraint under the action of external factors. This statement was correct. 5. The displacement method could be used not only for hyperstatic structures but also for static structures, so the original statement was wrong. 6. In the calculation of the moment distribution method for multi-node structures, it is correct to relax all the non-adjacent nodes at the same time to accelerate the convergence speed. 7. In the moment distribution, when the far end is a directional support, the transmission coefficient is 0. This statement is correct. 8. In a given continuous beam, the unbalanced moment of node B needs to be calculated according to the specific bending moment value. 9. In the moment distribution method, when the far end is a directional support, the transmission coefficient is 1, which is wrong. 10. The moment distribution method was applicable to continuous beams, which was correct. ##3. Calculation questions (10 points for each sub-question, 30 points in total) 1. For example, using the displacement method to calculate the rigid frame: - Basic unknown: determine the basic unknown of the rigid frame (such as the angular displacement of only one node B). - [Basic System: Add additional rigid arms to a specific point (such as point B) to restrict its rotation to obtain the basic system.] - The displacement equation: List the equation. - Calculating the coefficient and free term: By making some values, the corresponding graph is used to assist in the calculation. The node is taken as the research object, and the coefficient and free term are calculated according to the equilibrium condition. Finally, the equation system is solved to obtain the result. 2. The calculation of other rigid frames or continuous beams followed similar steps, including determining the basic unknown variables, the basic system, listing the displacement equation, and then calculating the coefficient terms and free terms. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Since I don't have any specific questions about the civil engineering mechanics examination task 5 (such as question requirements, knowledge points, etc.), I can only provide a general situation. The National Civil Engineering Mechanics Form Test Mission 5 may cover various assessment contents related to civil engineering mechanics. It may involve the discussion of the connection of civil engineering mechanics knowledge in practical work or life, the understanding of relevant concepts and principles of civil engineering mechanics, the application of structural mechanics analysis methods, etc. If you can provide me with more specific questions about Form Test Mission 5, I will be able to give a more accurate answer. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Cardin's theorem was proposed by the famous French entrepreneur Pierre Cardin. The theorem pointed out that one plus one was not equal to two in terms of employment, and sometimes it might even be equal to zero. This meant the importance and effectiveness of cooperation. An effective cooperation could break through the effect of quantity stacking. In other words, one plus one could not only be equal to two, but it could also be greater than two. However, an ineffective combination could reduce all efforts to nothing. Therefore, companies needed to consider a reasonable combination when allocating talents, so that the members could complement each other and cooperate with each other, give full play to their respective advantages, and achieve effective cooperation.

If you wanted to use the Pythagorean theorem to prove that a triangle was a right triangle, you could do the following: For a triangle, let its three sides be a, b, and c (c is the longest side). If a2 + b2 = c2, then this triangle is a right triangle. The principle was that the Pythagorean theorem stated that the sum of the squares of the two right-angle sides of a right triangle was equal to the square of the oblique side. Therefore, when the three sides of a triangle satisfy the above relationship, it can be determined that it is a right triangle. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

He recommended," Who cares about childhood sweethearts when you can cultivate?" It was a Xianxia cultivation novel written by Lin Zhudao. Xu Ji had transmigrated into the body of a third-year student of the Immortal Alliance in the Immortal Cultivation World. His original body had died of Qi deviation due to the words of his childhood sweetheart. After Xu Ji was reborn, he pursued longevity wholeheartedly and was in the limelight at the Immortal Alliance Competition. The Legend of the Heavens of the Siheyuan was not bad either. It was a novel written by Shi Liuguang. Xu Damao started his journey from the courtyard house. There were many characters in the book, such as the female lead Lou Xiao'e, He Yushui, and the supporting role Xu Yang. Each character had a unique setting and rich plot. " I Really Don't Know How to Reasonably Explain " was a mystery detective novel that failed to become a literary work. The main character was a Samsara traveler who wanted to retire but could not. This novel was dark and mysterious. The main character had a unique personality, the plot was full of twists and turns, and the reasoning was reasonable. Although the writing style and concept were average, the plot was extremely attractive. " Entertainment: Counting the Top 10 Breakup Poetry at the Beginning ", a novel written by an urban entertainment star by Hao Li. The protagonist relied on the video editing system to take stock of all kinds of " Top Ten in History " to become an all-around superstar. Unlimited Naruto was Yi Anz's light novel. In Naruto Doujinshi, the main character had transmigrated to the Naruto world where everyone knew the future. Although he faced the crisis of being arrested by Muye, the story had a big brain hole and the male protagonist had strong political power. Although there were some shortcomings in the later stages, it was still considered a masterpiece. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Bell's theorem is really fascinating. The graphic novel likely presents it in an accessible way. It might use illustrations to explain the complex concepts behind Bell's theorem, such as quantum entanglement. Maybe it shows how Bell's work challenges our classical understanding of physics through visual stories.

He recommended a few good novels. The Physiognomist System was an urban supernatural novel written by Yan Xingyu. The conversation between the protagonist and the system was very interesting, like " I'm not learning anymore!" "I'll definitely do my best to learn it well!" The book list commented that the plot was good, and the IQ was high. It was not a low-end pretentious fortune-teller novel. " Grave Robber: I Can Hear the Talking Antiques " was Ge Buyou's mystery adventure novel. Xiao Ran transmigrated into the owner of an antique shop and could hear the talking antiques. He started his adventure in the tomb world. " The Dimensional Shop in Marvel ", a light novel by Swoosh Film L. After Mu Yang obtained the mall system, there were small changes in the universe. " Master Liu's Leisurely Life " was a novel about urban life written by Big Mountain and Black Water. The main character had a fortune-telling system. It was a relaxing and entertaining novel, and it seemed pretty good at the moment. " Siheyuan: The Opening Bombardment of Qin Huairu " was a novel about the infinite heavens in front of Buddha. The story of the Siheyuan characters was very exciting. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The Thomas Theorem originated from the sociological studies. It basically states that if people define situations as real, they are real in their consequences.

The focal ratio theorem of the conical curve was a theorem related to the polar coordinate equation of the conical curve. According to the given polar coordinate equation of the conical curve, p =ep/(1-e* cos0), and the straight line, 0 =c or 0 = Pi +c, where c is a constant, the focal ratio theorem can be derived as:| 1-e*cosc)/(1+e*cosc)|.The specific derivation process is as follows: Consider the intersection of the conical curve and the straight line. The coordinates of the intersection are (ep/(1-e*cosc), c) and (ep/(1+e*cosc), Pi +c). According to the definition of focal radius, the focal radius length was the distance from the focal point to the intersection point. Therefore, the ratio of focal radius to length is| 1-e*cosc)/(1+e*cosc)|.This was the derivation process of the focal ratio theorem for conical curves.

I recommend a few novels. " Cultivation: From the Way of Thought to Experience " was a fantasy novel written by the Spring and Autumn Annals. The main character had transmigrated to a different world of demons and devils. There, the Divine Dao, Immortal Dao, Martial Dao, and demons were all different. The main character, Xu Yan, was in the Marquis Dingyuan Mansion. He relied on the proficiency panel to start his journey of Dao from the Way of Thought. It was very exciting. " Love Chun Love " was Chun Jing's romantic youth novel. The male and female lead Fang Zichun and Lan Keer met in the 1990s and missed each other. Later, their fates were similar and they reunited because of music. There were many difficulties in the middle. There were many characters in the book, and their characteristics were distinct. For example, Lan Keer was gentle and beautiful, while the male lead Fang Zichun was arrogant and confident. Different characters had different charms. " Since I've fallen in love with you, I won't let go." Who else can I love other than you? It was a young school novel. The relationship between the male and female protagonists was very interesting. The female protagonist was strong and stubborn, while the male protagonist was cold and heartless and was touched by the female protagonist. " Romance of Love " was written by Cherry. The female protagonist met the young masters of the four major families due to a small matter at the Santa Maria Academy. Her life was disrupted, especially her relationship with Murong Jingxi. " The First Lady," Xi Bao's ancient romance novel. The interaction between Sophia and Edward was very interesting. No matter how " perverted " it was in the middle, the ending was good. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>